def find_stars(stars, site):
sources = {}
for star in stars:
[az, el] = source_azel(ephem.star(star), site)
if el > 8.0:
sources[star] = ephem.star(star)
return sources
def find_stars(stars, site):
sources = {}
for star in stars:
[az, el] = source_azel(ephem.star(star), site)
if el > 8.0:
sources[star] = ephem.star(star)
return sources
def align_polaris(ra_ticks, dec_ticks):
rho = ep.Observer()
rho.lon, rho.lat = '-82.586203', '29.400249'
pol = ep.star('Polaris')
altair = ep.star('Altair')
altair.compute(rho)
pol.compute(rho)
# print "Polaris:", pol.ra, pol.dec
# print altair.name, altair.ra, altair.dec
# print "Rho Sidereal Time:", rho.sidereal_time()
zero = pol.ra
def find_stars(stars, site, disp):
sources = {}
for star in stars:
[az, el] = source_azel(ephem.star(star), site)
if disp:
print star, az, el
if el > 15.0:
sources[star] = ephem.star(star)
print star, az, el
return sources
def find_stars(stars, site, disp):
sources = {}
for star in stars:
[az, el] = source_azel(ephem.star(star), site)
if disp:
print star, az, el
if el > 15.0:
sources[star] = ephem.star(star)
print star, az, el
return sources
def setReferenceStars():
starDBsize = len(ephem.stars.db.split("\n"))
starDBnow = []
starList = ephem.stars.db.split("\n")
for i, star in enumerate(starList):
if i < starDBsize - 1:
S = ephem.star(star.split(",")[0])
S.compute(obs)
if S.alt > math.pi / 8:
starDBnow.append((S.name, S.alt, S.az, S.mag))
starDBnow = sorted(starDBnow, key=lambda star: star[3])
star1 = ephem.star(starDBnow[0][0])
star1.compute(obs)
star2 = None
nxt = 1
while nxt < len(starDBnow) and star2 == None:
if abs(starDBnow[nxt][1] - star1.alt) > math.pi / 8:
azDiff = min(
abs(starDBnow[nxt][2] - star1.az) % (2 * math.pi),
2 * math.pi - abs(starDBnow[nxt][2] - star1.az) %
(2 * math.pi))
if (azDiff > math.pi / 6) and (abs(math.pi - azDiff) >
math.pi / 6):
star2 = ephem.star(starDBnow[nxt][0])
nxt = nxt + 1
star2.compute(obs)
star3 = None
nxt = 1
while nxt < len(starDBnow) and star3 == None:
if ((abs(starDBnow[nxt][1] - star1.alt) > math.pi / 8)
or (abs(starDBnow[nxt][1] - star2.alt) > math.pi / 8)):
azDiff1 = min(
abs(starDBnow[nxt][2] - star1.az) % (2 * math.pi),
2 * math.pi - abs(starDBnow[nxt][2] - star1.az) %
(2 * math.pi))
azDiff2 = min(
abs(starDBnow[nxt][2] - star2.az) % (2 * math.pi),
2 * math.pi - abs(starDBnow[nxt][2] - star2.az) %
(2 * math.pi))
azDiff = min(azDiff1, azDiff2)
if (azDiff > math.pi / 6):
star3 = ephem.star(starDBnow[nxt][0])
nxt = nxt + 1
star3.compute(obs)
return star1, star2, star3
def quick_s(name, track):
if not track:
clear_lock()
if hasattr(ephem, name.get()): # Check for named planets/moons
obj = getattr(ephem, name.get())()
search(obj, 'Planet/Moon')
else:
try:
ephem.star(name.get()) # Check if named star
except KeyError:
read_db(name) # If not, read from custom objects database
else:
obj = ephem.star(name.get()) # If it's a star
search(obj, 'Named Star')
def confirm_align(star):
result = tkMessageBox.askyesno("Align Telescope", "Are you sure?")
if result is True:
# Check if encoders are available
try:
ra = enc.Enc('RAEncoder')
dec = enc.Enc('DECEncoder')
except:
log_action('ALIGN', 'Scope', 'Encoder(s) not found')
else:
# Initialize encoders
ra = enc.Enc('RAEncoder')
success = ra.connect()
if not success:
log_action('Connect', 'Encoder',
'RAEncoder failed to initialize')
dec = enc.Enc('DECEncoder')
success = dec.connect()
if not success:
log_action('Connect', 'Encoder',
'DECEncoder failed to initialize')
# Look up the star
try:
ephem.star(star) # Check if 'name' is a named star
except KeyError:
obj = read_db(
star
) # If not, read 'name' from the custom objects database (Weird to do but w/e)
else:
obj = ephem.star(star) # But if it was a star...
obj.compute(rho)
# Create Scope object
scope = sc.Scope(obj, ra, dec)
position = scope.where() # Grab scope position to confirm align
st = rho.sidereal_time() # Grab RHO sidereal time
ha = '%s' % ephem.hours(
st - ephem.hours(position[0])) # Calc HA of object from RHO
s_ha.set(ha)
s_dec.set(str(position[1]))
s_tick_ha.set(scope.data['Ticks'][-1][0])
s_tick_dec.set(scope.data['Ticks'][-1][1])
log_action('Align Success', obj.name,
str('HA: ' + position[0] + ' | DEC: ' + position[1]))
s_ready.set('Telescope Aligned')
s_scope.config(fg='black')
else:
# Do nothing
return
def __init__(self, config, name):
super(self.__class__, self).__init__(config)
self.body = ephem.star(STAR_CATALOG[name]['name'])
self.id = STAR_CATALOG[name]['id']
self.name = STAR_CATALOG[name]['name']
self.category = "star"
def PlotStars(window, observer):
for astroObj in config.stardb:
star_db_element = ephem.star(astroObj)
star_db_element.compute(observer)
if (star_db_element.neverup): # Makes it run faster
continue
[x, y] = ProjectCoordinates(star_db_element.alt,
star_db_element.az) # degrees (alt/az)
if (config.VISIBLE and star_db_element.mag < config.MAXMAGNITUDE):
star = Circle(Point(x, y), magnitudeScale(star_db_element))
star.setFill(config.STARCOLOR)
star.setOutline(config.STARCOLOR)
star.draw(window)
if (config.SHOWSTARNAMES):
starName = Text(Point(x, y - 10), astroObj.upper())
starName.setOutline(config.LABELCOLOR)
starName.setSize(7)
starName.draw(window)
if (config.VERBOSE):
print(astroObj)
print("Mag: " + str(star_db_element.mag))
print("alt: " + str(star_db_element.alt))
print("az: " + str(star_db_element.az))
print("")
config.VISIBLE = True
return
def epoch_transmatrix(time, stdtime=2000.0):
import ephem as eph
coorstd = np.zeros((3, 3))
coortime = np.zeros((3, 3))
stars = ['Agena', 'Menkar', 'Polaris']
xs = {}
ys = {}
zs = {}
xt = {}
yt = {}
zt = {}
for starname, i in zip(stars, range(len(stars))):
star = eph.star(starname)
star.compute('2000', epoch='%f' % stdtime)
xs[starname] = np.cos(star.a_dec) * np.cos(star.a_ra)
ys[starname] = np.cos(star.a_dec) * np.sin(star.a_ra)
zs[starname] = np.sin(star.a_dec)
coorstd[i] = [xs[starname], ys[starname], zs[starname]]
star.compute('2000', epoch='%f' % time)
xt[starname] = np.cos(star.a_dec) * np.cos(star.a_ra)
yt[starname] = np.cos(star.a_dec) * np.sin(star.a_ra)
zt[starname] = np.sin(star.a_dec)
coortime[i] = [xt[starname], yt[starname], zt[starname]]
return (coortime.T).dot(la.inv(coorstd.T))
def setupTarget(ra_deg, dec_deg, pmra=0, pmdec=0, name=None, verbose=False):
"""
ra_deg, dec_deg : strings or scalars
Right ascenscion and Declination, in *decimal degrees* (scalar)
or sexagesimal (if strings)
"""
# 2015-03-19 21:37 IJMC: Created
target = ephem.star('Rigel')
if name is not None:
target.name = name
if isNumeric(ra_deg):
ra_deg = hms(ra_deg, output_string=True)
if isNumeric(dec_deg):
dec_deg = dms(dec_deg, output_string=True)
#print ra_deg, dec_deg
target._ra, target._dec = ra_deg, dec_deg
#print target._ra, target._dec
if pmra<>0:
target._pmra = pmra
if pmdec<>0:
target._pmdec = pmdec
return target
def arcturus_observations(self, extra_args={}):
self.observed_location.horizon = standard_horizon()
arcturus = ephem.star('Arcturus')
try:
self.observations["previous_arcturus_rise"] = to_date_time(self.observed_location.previous_rising(arcturus))
except Exception, e:
self.observations["previous_arcturus_rise"] = ""
def epoch_transmatrix(time,stdtime=2000.0):
import ephem as eph
coorstd=np.zeros((3,3))
coortime=np.zeros((3,3))
stars=['Agena','Menkar','Polaris']
xs={};ys={};zs={}
xt={};yt={};zt={}
for starname,i in zip(stars,range(len(stars))):
star=eph.star(starname)
star.compute('2000',epoch='%f'%stdtime)
xs[starname]=np.cos(star.a_dec)*np.cos(star.a_ra)
ys[starname]=np.cos(star.a_dec)*np.sin(star.a_ra)
zs[starname]=np.sin(star.a_dec)
coorstd[i]=[xs[starname],ys[starname],zs[starname]]
star.compute('2000',epoch='%f'%time)
xt[starname]=np.cos(star.a_dec)*np.cos(star.a_ra)
yt[starname]=np.cos(star.a_dec)*np.sin(star.a_ra)
zt[starname]=np.sin(star.a_dec)
coortime[i]=[xt[starname],yt[starname],zt[starname]]
return (coortime.T).dot(la.inv(coorstd.T))
def indexKnownBrightestStars(filename, lat, lon, elevation, date):
f = file(filename)
#we want the star positions for our current observer location to compare against
observer = ephem.Observer()
observer.lat = lat
observer.lon = lon
observer.elevation = elevation
observer.date = date
brightestStars = []
#create ephem body objects for each star name in the file
for line in f:
starname = line.strip('\n')
star = ephem.star(starname)
star.compute(observer)
if (star.alt >= 0):
brightestStars.append(star)
quads = []
for star in brightestStars:
newquad = starQuad(star)
newquad.findQuad(brightestStars)
if (newquad.pointsInUnitCircle):
print star, "closest stars:", newquad.quad
quads.append(newquad)
return (brightestStars, quads)
def __init__(self, config, name):
super(self.__class__, self).__init__(config)
self.body = ephem.star(STAR_CATALOG[name]['name'])
self.id = STAR_CATALOG[name]['id']
self.name = STAR_CATALOG[name]['name']
self.category = "star"
def vega_observations(self, extra_args={}):
self.observed_location.horizon = standard_horizon()
vega = ephem.star('Vega')
try:
self.observations["previous_vega_rise"] = to_date_time(self.observed_location.previous_rising(vega))
except Exception, e:
self.observations["previous_vega_rise"] = ""
def capella_observations(self, extra_args={}):
self.observed_location.horizon = standard_horizon()
capella = ephem.star('Capella')
try:
self.observations["previous_capella_rise"] = to_date_time(self.observed_location.previous_rising(capella))
except Exception, e:
self.observations["previous_capella_rise"] = ""
def setupTarget(ra_deg, dec_deg, pmra=0, pmdec=0, name=None, verbose=False):
"""
ra_deg, dec_deg : strings or scalars
Right ascenscion and Declination, in *decimal degrees* (scalar)
or sexagesimal (if strings)
"""
# 2015-03-19 21:37 IJMC: Created
target = ephem.star('Rigel')
if name is not None:
target.name = name
if isNumeric(ra_deg):
ra_deg = hms(ra_deg, output_string=True)
if isNumeric(dec_deg):
dec_deg = dms(dec_deg, output_string=True)
#print ra_deg, dec_deg
target._ra, target._dec = ra_deg, dec_deg
#print target._ra, target._dec
if pmra <> 0:
target._pmra = pmra
if pmdec <> 0:
target._pmdec = pmdec
return target
def rigel_observations(self, extra_args={}):
self.observed_location.horizon = standard_horizon()
rigel = ephem.star('Rigel')
try:
self.observations["previous_rigel_rise"] = to_date_time(self.observed_location.previous_rising(rigel))
except Exception, e:
self.observations["previous_rigel_rise"] = ""
def set_star(self, star):
print("try to set star to {0}".format(star))
try:
self.obj=ephem.star(star)
except KeyError:
print("Apparently this is not a valid name of a star and can therefore not be set!")
return
print("succesfully set star to {0}".format(self.obj.name))
def quick_s(name, track):
if not track: # If variable 'track' is False, clear the tracking because it's a new object being searched.
clear_lock()
if hasattr(ephem,
name.get()): # Check if variable 'name' is a named planet/moon
obj = getattr(ephem, name.get())() # If so, grab it
search(obj, 'GET Planet/Moon') # Object search and log detail
else:
try:
ephem.star(name.get()) # Check if 'name' is a named star
except KeyError:
read_db(
name) # If not, read 'name' from the custom objects database
else:
obj = ephem.star(name.get()) # But if it was a star...
search(obj, 'GET Named Star'
) # ...Send it along with the correct log detail
def make_all_bodies():
sun = ephem.Sun()
moon = ephem.Moon()
planets = [planet() for planet in PLANETS]
stars = [ephem.star(name) for name in STARS]
comet_dct = Comets()
comets = [comet_dct[name] for name in COMETS]
return [sun, moon] + planets + comets + stars
def RA_DEC(ob,latt,long,ele):
obs=ephem.Observer()
obs.lat=latt
obs.lon=long
obs.elevation=float(ele)
obj=ephem.star(ob)
obj.compute(obs)
print('\n',ob)
print('RA:',obj.ra.real,' DEC:', obj.dec.real)
def get_all_stars():
""" Return all the stars of ephem module."""
stars_dict={}
for star in ephem.stars.db.split("\n"):
key=star.split(",")[0]
#print key
if key:
stars_dict[key]=ephem.star(key)
return stars_dict
def print_stars():
for name in sorted(stars):
star = ephem.star(name)
star.compute()
print(
"{0.mag:+.1f} {0.name:20} {1:>16} {2:>16} {3}".format(
star,
_(star.ra, astro.utils.HMS),
_(star.dec),
ephem.constellation(star)[1]))
def Test():
# px = 986.444
# py = 439.240
# print( "px: %f py: %f" % (px,py) )
# (azim,elev) = PixelToAzEl(px, py)
# (azim,elev) = RadToDeg(azim, elev)
# print( "Az: %f El: %f" % (azim,elev))
# azim,elev = DegToRad(azim,elev)
# px,py,dist = AzElToPixel( azim,elev )
# print( "px: %f py: %f dist: %f" % (px,py,dist) )
# maxDist = 0.0
# maxAzim = 0.0
# maxElev = 0.0
# for i in range(10000):
# azim = uniform(0.0,360.0)
# elev = uniform(0.0,90.0)
# azim2,elev2 = DegToRad(azim,elev)
# px,py,dist = AzElToPixel( azim2,elev2 )
# if dist > maxDist:
# maxDist = dist
# maxAzim = azim
# maxElev = elev
# print("Max dist: %f at azim: %f elev: %f" % (maxDist,maxAzim,maxElev))
vega = ephem.star("Vega")
#vega.compute("2019/9/5")
abq = ephem.Observer()
abq.lon = "-106.5428"
abq.lat = "35.1497"
abq.elevation = 1690.0
abq.date = "2019/9/9 09:00:00"
print("Date: %s" % abq.date)
vega.compute(abq)
alt = float(vega.alt) * 180.0 / pi
az = float(vega.az) * 180.0 / pi
print("Alt: %f Az: %f" % (alt, az))
azim, elev = DegToRad(az, alt)
px, py, dist = AzElToPixel(azim, elev)
print("px: %f py: %f dist: %f" % (px, py, dist))
def star_state(time, latitude, longitude):
global STAR_NAMES
observer = ephem.Observer()
observer.date = time
observer.lat = latitude
observer.lon = longitude
ephem_planets = [ephem.Sun(observer), ephem.Moon(observer), ephem.Mercury(observer),\
ephem.Venus(observer), ephem.Mars(observer), ephem.Jupiter(observer), ephem.Saturn(observer)]
ephem_stars = [ephem.star(star_name, observer) for star_name in STAR_NAMES]
return qt.Qobj(
ALTITUDEaZIMUTH_v([(planet.alt, planet.az)
for planet in ephem_planets])).unit()
def __init__(self, aplon, aplat, target="sunll", Hs=0, time="2012", elev=0, temp=20, press=1013):
self.aplon=(aplon)
self.aplat=(aplat)
self.target=target
self.Hs=Hs
self.time=ephem.date(time)
self.elev = elev
self.temperature = temp
self.pressure = press
self.ap = ephem.Observer()
self.ap.lon = self.aplon
self.ap.lat = self.aplat
self.ap.elevation = self.elev
self.ap.date = self.time
self.ap.temp = self.temperature
self.ap.pressure = self.pressure
if self.target == ("sunll"):
self.o = ephem.Sun()
self.cordir = -1
elif self.target == ("sunul"):
self.o = ephem.Sun()
self.cordir = 1
elif self.target ==("moonll"):
self.o = ephem.Moon()
self.cordir = -1
elif self.target ==("moonul"):
self.o = ephem.Moon()
self.cordir = 1
elif self.target == "venus":
self.o = ephem.Venus()
self.cordir = 0
elif self.target == "Mars":
self.o = ephem.Mars()
self.cordir = 0
elif self.target == "Jupiter":
self.o = ephem.Jupiter()
self.cordir = 0
elif self.target == "Saturn":
self.o = ephem.Saturn()
self.cordir = 0
else:
self.o = ephem.star(self.target)
self.cordir = 0
self.o.compute(self.ap)
self.Dip = 1.76*math.pi/10800*math.sqrt(self.elev)
self.Ho = self.Hs - self.Dip
def compute(target, o=None):
if o is None:
o = ephem.city('Atlanta')
o.date = '2009/09/06 17:00'
if isinstance(target, str):
target = ephem.star(target)
target.compute(o)
# Pyephem use Dublin JD, ephemeride uses Modified JD!
mjd = o.date + 15020 - 0.5
print(' {"%s", %.8f, %.8f, %.8f,\n'
' %.8f, %.8f, %.8f, %.8f, %.8f, %.8f},') % (
target.name, mjd, o.lon * R2D, o.lat * R2D, target.a_ra * R2D,
target.a_dec * R2D, target.ra * R2D, target.dec * R2D,
target.alt * R2D, target.az * R2D)
def give_it_a_spin():
"""
Tests basic functionality of Astrorobot
See: https://github.com/Stellarium/stellarium/blob/585dcacdf71372de845b81420e1b9d1b80369263/src/core/RefractionExtinction.cpp
for calculations on
Extinction = amount of light absorbed by atmosphere vs altitude (NB also causes redenning of objects as blue light absorbed more)
Refraction = bending of light by atmosphere vs altitude (more bending nearer horizon
This is the refraction calculating code used by libastro (which ephem uses):
https://fossies.org/dox/xephem-3.7.7/refract_8c_source.html
"""
dt = datetime(2016,12,31,17,25,00)
ob = Observer(location="Bracknell,UK", timestamp=dt)
ob.get_weather()
print(ob.get_twilight())
s = Target(ob, "Betelgeuse")
print("Betelgeuse:")
print("\tEphem a-RADec: %s, Dec: %s (expected: 5:56:6 / 7:24:32)" % (s.a_ra, s.a_dec))
print("\tEphem RADec: %s, Dec: %s" % (s.ra, s.dec))
print("\tEphem AzAlt: Az: %s, Alt: %s" % (s.az, s.alt))
print("\tAstrorobot RADec apparent: %s" % unicode(s.ra_dec))
print("\tAstrorobot HADec apparent: %s (expected: 18:08:28 / 7:30:10)" % unicode(s.ha_dec))
print("\tAstrorobot AzAlt apparent: %s (expected: 86:56:56 / 7:10:32)" % unicode(s.az_alt))
#And now check directly
e_o = ephem.Observer()
e_o.lat = 51.410684
e_o.lon = -0.728876
e_o.elev = 50
e_o.horizon = 0
e_o.date = dt.strftime(settings.EPHEM_OBSERVER_DATE_FORMAT)
e_o.pressure = 0 #Set to zero
e_o.temp = 10.0
t = ephem.star("Betelgeuse")
t.compute(e_o)
print("Ephem pressure 0 AzAlt: %.12f, %.12f | RADec: %.12f, %.12f" % (t.az, t.alt, t.ra, t.dec))
e_o.pressure = 12000000.0
t.compute(e_o)
print("Ephem pressure 1200mBar AzAlt: %.12f, %.12f | RADec: %.12f, %.12f" % (t.az, t.alt, t.ra, t.dec))
e_o.compute_pressure()
print("ephem_observer pressure computed: %.12f" % e_o.pressure)
t.compute(e_o)
print("Ephem pressure computed AzAlt: %.12f, %.12f | RADec: %.12f, %.12f" % (t.az, t.alt, t.ra, t.dec))
print("--")
back_ra, back_dec = e_o.radec_of(t.az, t.alt)
print("Ephem AzAlt > RADec norm pressure: %s, %s | %.12f, %.12f" % (back_ra, back_dec, back_ra, back_dec))
e_o.pressure = 0
t.compute(e_o)
back_ra, back_dec = e_o.radec_of(t.az, t.alt)
print("Ephem AzAlt > RADec ZERO pressure: %s, %s | %.12f, %.12f" % (back_ra, back_dec, back_ra, back_dec))
def setup_object(self):
"""Method to generate an ephem.star object from the target coordinates.
"""
object = ephem.star('Rigel')
if self.name is not None:
object.name = self.name
ra = utils.hms(self.ra)
dec = utils.dms(self.dec)
object._ra, object._dec = ra, dec
#self.object = object
return object
def ALT_AZ(ob,latt,long,ele):
obs=ephem.Observer()
obs.lat=latt
obs.lon=long
obs.elevation=float(ele)
obj=ephem.star(ob)
obj.compute(obs)
alt=obj.alt.real
az=obj.az.real
altdeg=alt*180/math.pi
azdeg=az*180/math.pi
print('\n',ob)
print('ALT:',altdeg,' AZ:', azdeg)
return altdeg, azdeg
def _get_ephem_body(heavenly_body):
# The library 'ephem' refers to heavenly bodies using a capitalized
# name. For example, the module used for 'mars' is 'ephem.Mars'.
cap_name = heavenly_body.capitalize()
# If the heavenly body is a star, or if the body does not exist, then an
# exception will be raised. Be prepared to catch it.
try:
ephem_body = getattr(ephem, cap_name)()
except AttributeError:
# That didn't work. Try a star. If this doesn't work either,
# then a KeyError exception will be raised.
ephem_body = ephem.star(cap_name)
return ephem_body
def _get_ephem_body(heavenly_body):
# The library 'ephem' refers to heavenly bodies using a capitalized
# name. For example, the module used for 'mars' is 'ephem.Mars'.
cap_name = heavenly_body.capitalize()
# If the heavenly body is a star, or if the body does not exist, then an
# exception will be raised. Be prepared to catch it.
try:
ephem_body = getattr(ephem, cap_name)()
except AttributeError:
# That didn't work. Try a star. If this doesn't work either,
# then a KeyError exception will be raised.
ephem_body = ephem.star(cap_name)
return ephem_body
def star(star_name):
star = ephem.star(star_name)
south_bend = ephem.Observer()
date_class = datetime.now()
south_bend.lat = lat
south_bend.lon = lon
south_bend.date = date_class
star.compute(south_bend)
print "Date ", date_class
print "Mag ", star.mag
print "RA ", star.ra
print "Dec ", star.dec
next = raw_input('Would you like to look up another object?')
if next.strip() in 'y Y yes Yes YES'.split():
choice()
def star(star_name):
star = ephem.star(star_name)
south_bend = ephem.Observer()
date_class = datetime.now()
south_bend.lat = lat
south_bend.lon = lon
south_bend.date = date_class
star.compute(south_bend)
print "Date ", date_class
print "Mag ", star.mag
print "RA ", star.ra
print "Dec ", star.dec
next = raw_input('Would you like to look up another object?')
if next.strip() in 'y Y yes Yes YES'.split():
choice()
def find_ephem_obj(str):
if (not str):
return
if (str == "moon"):
return ephem.Moon()
elif (str == "sun"):
return ephem.Sun()
elif (str == "mars"):
return ephem.Mars()
elif (str == "andromeda" or str == "m31"):
return ephem.readdb("M31,f|G,0:42:44,+41:16:8,4.16,2000,11433|3700|35")
else:
try:
obj = ephem.star(str)
except KeyError:
return None
def compute_GHA_DEC(self):
# sun
if self.body == 'SunLL' or self.body == 'SunUL':
celestial_body = ephem.Sun()
# insert moon here
elif self.body == 'MoonLL' or self.body == 'MoonUL':
celestial_body = ephem.Moon()
# planets
elif self.body == 'Mars':
celestial_body = ephem.Mars()
elif self.body == 'Venus':
celestial_body = ephem.Venus()
elif self.body == 'Jupiter':
celestial_body = ephem.Jupiter()
elif self.body == 'Saturn':
celestial_body = ephem.Saturn()
elif self.body == 'Uranus':
celestial_body = ephem.Uranus()
elif self.body == 'Mercury':
celestial_body = ephem.Mercury()
# anything else must be a star, and its body can be interpreted via the string argument in ephem.star('')
else:
celestial_body = ephem.star(self.body)
obs = ephem.Observer()
# disable a correction for pressure, since we do this later
obs.pressure = 0
# format strings from datetime object
date = self.datetime.strftime('%Y/%m/%d')
time = self.datetime.strftime('%H:%M:%S')
date_string = date + ' ' + time
obs.date = date_string
celestial_body.compute(date_string, epoch=date_string)
deg = ephem.degrees(obs.sidereal_time() - celestial_body.g_ra).norm
ghas = nadeg(deg)
deg = celestial_body.g_dec
decs = nadeg(deg)
# convert GHA and DEC to Angle objects
self.GHA = Angle(ghas, unit=u.deg)
self.DEC = Angle(decs, unit=u.deg)
print('GHA and DEC for body {} are {:.3f} / {:.3f}'.format(
self.body, self.GHA.deg, self.DEC.deg))
return
def __init__(self):
self.logger = logging.getLogger(__name__)
# initialize the motors
self.motors = [
Motor("Azimuth", self.az_pins, positive=1),
Motor("Altitude", self.alt_pins, positive=-1),
]
# initialize observer and target
self._observer = ephem.Observer()
self._target = ephem.FixedBody()
# insteresting objects in our solar system and main stars
self._sky_objects = [
ephem.Sun(),
ephem.Moon(),
ephem.Mercury(),
ephem.Venus(),
ephem.Mars(),
ephem.Jupiter(),
ephem.Saturn(),
]
for star in sorted(
[x.split(",")[0] for x in ephem.stars.db.split("\n") if x]):
self._sky_objects.append(ephem.star(star))
# set boolean variable indicating tracking
self._is_tracking = False
self.restart = [False, False]
self.running = [False, False]
# initialize angles/steps lists for calibration
self._angles_steps = [[], []]
# initialize motor threads
self._motor_threads = [None, None]
az_default_spr = 1293009
alt_default_spr = 1560660
self.motors[0].steps_per_rev = az_default_spr
self.motors[1].steps_per_rev = alt_default_spr
# at startup no client is connected
self._client_connected = False
def _test_body(self, name, sha, dec, date=NP314_DATE):
obj = ephem.star(name)
obs = ephem.Observer()
obs.date = date
obj.compute(obs)
exp_sha = ephem.degrees(sha)
err_sha = math.degrees(2 * ephem.pi - obj.g_ra - exp_sha)
self.assertTrue(
abs(err_sha) < self.MAX_ERROR_DEGREES,
'SHA fail: {0!s:} !< {1!s:}'.format(abs(err_sha),
self.MAX_ERROR_DEGREES))
exp_dec = ephem.degrees(dec)
err_dec = math.degrees(obj.g_dec - exp_dec)
self.assertTrue(
abs(err_dec) < self.MAX_ERROR_DEGREES,
'Dec. fail: {0!s:} !< {1!s:}'.format(abs(err_dec),
self.MAX_ERROR_DEGREES))
def close_star_approaches(year=None):
if year is None:
year = ephem.now().triple()[0]
starting_date = ephem.Date(str(year))
stars_list = [ephem.star(name) for name in stars.keys()]
# Stars don't move, so just compute them once
[star.compute(starting_date) for star in stars_list]
planets = [planet() for planet in PLANETS]
for day in range(365):
date = ephem.Date(starting_date + day)
[body.compute(date) for body in planets]
for body in planets:
for star in stars_list:
sep = ephem.separation(body, star)
if sep < ephem.degrees('3'):
print(date, body.name, star.name, sep)
def _test_body(self, name, sha, dec, date=NP314_DATE):
obj = ephem.star(name)
obs = ephem.Observer()
obs.date = date
obj.compute(obs)
exp_sha = ephem.degrees(sha)
err_sha = math.degrees(2 * ephem.pi - obj.g_ra - exp_sha)
self.assertTrue(
abs(err_sha) < self.MAX_ERROR_DEGREES,
'SHA fail: {0!s:} !< {1!s:}'.format(abs(err_sha), self.MAX_ERROR_DEGREES)
)
exp_dec = ephem.degrees(dec)
err_dec = math.degrees(obj.g_dec - exp_dec)
self.assertTrue(
abs(err_dec) < self.MAX_ERROR_DEGREES,
'Dec. fail: {0!s:} !< {1!s:}'.format(abs(err_dec), self.MAX_ERROR_DEGREES)
)
def _main(args):
if args['get']:
values = {}
template = "ha={ha}\nde={de}"
#@TODO angle formats
if args['raw']:
values = get_raw()
elif args['normalised']:
values = get_normalised()
elif args['internal']:
values = get_internal()
elif args['ring']:
values = get_ring()
elif args['local']:
values = get_local()
elif args['celest']:
values = get_celest()
template = "ra={ra}\nde={de}"
elif args['altaz']:
values = get_altaz()
template = "alt={alt}\naz={az}"
elif args['chirality']:
values = {'chirality': get_chirality()}
template = "{chirality}"
print template.format(**values)
elif args['set']:
if args['internal']:
ha = float(args['<HA>'])
de = float(args['<DE>'])
set_internal({'ha': ha, 'de': de}, args['blind'])
elif args['celest']:
ra = float(args['<RA>'])
de = float(args['<DE>'])
set_internal(celest_to_internal({'ra': ra, 'de': de}), args['blind'])
elif args['star']:
star = ephem.star(args['<NAME>'])
star.compute(tican())
set_internal(celest_to_internal({'ra': star.ra / math.pi * 12, 'de': star.dec / math.pi * 180}), args['blind'])
elif args['cat']:
celest = dagor_catalog.get_celest(args['<NAME>'], args['<CATALOG>'])
set_internal(celest_to_internal(celest), args['blind'])
def _get_ephem_body(heavenly_body):
# The library 'ephem' refers to heavenly bodies using a capitalized
# name. For example, the module used for 'mars' is 'ephem.Mars'.
cap_name = heavenly_body.title()
# If the heavenly body is a star, or if the body does not exist, then an
# exception will be raised. Be prepared to catch it.
try:
ephem_body = getattr(ephem, cap_name)()
except AttributeError:
# That didn't work. Try a star. If this doesn't work either,
# then a KeyError exception will be raised.
ephem_body = ephem.star(cap_name)
except TypeError:
# Heavenly bodies added by a ephem.readdb() statement are not functions.
# So, just return the attribute, without calling it:
ephem_body = getattr(ephem, cap_name)
return ephem_body
def current_separations():
stars_list = [ephem.star(name) for name in stars.keys()]
planets = [planet() for planet in PLANETS]
solar_system = [ephem.Moon()] + planets
[body.compute() for body in solar_system + stars_list]
print(type(stars_list[0]))
angles = []
# Separations between solar system bodies and stars
for body in solar_system:
for star in stars_list:
angles.append(
Separation(body, star, ephem.separation(body, star)))
# more separations
for a, b in itertools.combinations(solar_system, 2):
angles.append(Separation(a, b, ephem.separation(a, b)))
for sep in sorted(angles, key=operator.attrgetter('angle')):
if sep.angle > MAX_ANGLE:
break
print(sep)
class position:
#position of the HESS Site
HESS_site = ephem.Observer()
HESS_site.lat = ephem.degrees("-23.271536")
HESS_site.long = ephem.degrees("16.500974")
#object we observe
obj = ephem.star("Acrux")
#sets the observed object to an new star
def set_star(self, star):
print("try to set star to {0}".format(star))
try:
self.obj=ephem.star(star)
except KeyError:
print("Apparently this is not a valid name of a star and can therefore not be set!")
return
print("succesfully set star to {0}".format(self.obj.name))
#returns the position of the observed object in Ra, Dec coordinates
def get_ra_dec(self):
return (self.obj.ra, self.obj.dec)
def get_az_alt(self):
self.HESS_site.date = ephem.Date(datetime.utcnow())
self.obj.compute(self.HESS_site)
#print("Time: {0} , Alt: {1} , Az: {2}".format(datetime.utcnow(), self.obj.az/np.pi*180, self.obj.alt/np.pi*180))
return self.obj.az/np.pi*180, self.obj.alt/np.pi*180
def get_star_list(self):
return [
"Acrux",
"Peacock",
"Alnair",
"Mimosa",
"Test"
]
def get_name(self):
return self.obj.name
def GetStarInfo(self, starName):
try:
s = ephem.star(starName)
s.compute(self.myObserver)
star_rightascension = s._ra
star_declination = s._dec
star_magnitude = s.mag
star_elongation = s.elong # angle to sun
star_circumpolar = s.circumpolar # stays above horizon?
star_neverup = s.neverup # never rises?
star_altitude = s.alt
star_azimuth = s.az
star_compass = AU.AzimuthToCompassDirection(star_azimuth)
star_constellation = str(ephem.constellation(s)[1])
star_visible = True if star_altitude > 0 else False
dictionaryData = {}
dictionaryData["Name"] = str(starName)
dictionaryData["RightAscension"] = str(star_rightascension)
dictionaryData["Declination"] = str(star_declination)
dictionaryData["Magnitude"] = str(star_magnitude)
dictionaryData["Elongation"] = str(star_elongation)
dictionaryData["Circumpolar"] = star_circumpolar
dictionaryData["NeverUp"] = star_neverup
dictionaryData["Altitude"] = str(star_altitude)
dictionaryData["Azimuth"] = str(star_azimuth)
dictionaryData["Compass"] = str(star_compass)
dictionaryData["IsVisible"] = star_visible
if self.prettyprint == True:
json_string = json.dumps(dictionaryData, sort_keys=True, indent=4, separators=(",", ": "))
else:
json_string = json.dumps(dictionaryData, sort_keys=True, separators=(",", ": "))
return json_string
except Exception as ex:
print str(ex)
return "{ }"
def compare_pyephem_with_my_code():
"""
Compares my CoordinatePairs to the Pyephem library
17 Toll Gardens, Bracknell location = 51°24'38.5"N 0°43'44.0"W (51.410684, -0.728876)
Betelgeuse @ 2016-12-23 17:05:
RA = Decimal('1.5538093862003428125007076232577674090862274169921875') <radians>
Dec = Decimal('0.1292627123113075648941361350807710550725460052490234375') <radians>
"""
latitude = "51:24.385"
longitude = "-0:43.44"
my_latlon = LatLon(d("51.410684"), d("-0.728876"))
my_time = datetime.utcnow()
#
# PyEphem's calculations
observer = ephem.Observer()
observer.lat = latitude
observer.lon = longitude
observer.date = my_time.strftime("%Y/%m/%d %H:%M:%S")
betelgeuse = ephem.star("Betelgeuse")
betelgeuse.compute(observer)
#
#My calculations - we'll start with Betelgeuse's apparent RADec
my_radec = ApparentRADec(d(float(betelgeuse.ra)), d(float(betelgeuse.dec)), mode="rad")
my_radec.apparent = True
#Lets look at output:
#RA
print("PyEphem - Betelgeuse RADec = %.6f, %.6f [%s, %s]" % (betelgeuse.ra, betelgeuse.dec.norm, betelgeuse.ra, betelgeuse.dec))
print("My - RADec = %.6f, %.6f %s" % (my_radec.ra.norm, my_radec.dec.norm, my_radec))
#Az alt
print("PyEphem - Betelgeuse AzAlt = %.6f, %.6f [%s, %s]" % (betelgeuse.az, betelgeuse.alt, betelgeuse.az, betelgeuse.alt))
print("My - AzAlt = %s" % my_radec.to_az_alt(latitude=my_latlon.latitude, longitude=my_latlon.longitude, timestamp=my_time))
print("Sidereal RA > %s" % sidereal.raToHourAngle(betelgeuse.ra, my_time, eLong=observer.lon))
print(dir(betelgeuse))
print(dir(observer))
def planetsStarsAbove(qth):
"""Calculate whether certain planets or stars are visible above or not.
Of course, it's going to be hard to see things if it's daytime!.
"""
planetsStarsAbove = {}
location = ephem.Observer()
location.lat = qth[0]
location.lon = qth[1]
location.elevation = float(qth[2])
for body in solar_system_bodies:
e = getattr(ephem, body)
setting = location.next_setting(e()).datetime()
rising = location.next_rising(e()).datetime()
if setting < rising:
planetsStarsAbove[body] = True
else:
planetsStarsAbove[body] = False
for star in stars:
e = ephem.star(star)
try:
setting = location.next_setting(e).datetime()
except ephem.AlwaysUpError:
continue
rising = location.next_rising(e).datetime()
if setting < rising:
planetsStarsAbove[star] = True
else:
planetsStarsAbove[star] = False
return planetsStarsAbove
def position_finder(inputs):
start = inputs.find("[")
end = inputs.find("]")
last = inputs.find("/")
observer = ephem.Observer()
observer.lat = ephem.degrees(inputs[end+1:last])
observer.lon = ephem.degrees(inputs[start+1:end])
observer.elevation = 100#by defualt it will change later
observer.date = ephem.now()
observer.epoch = '2020'
if int(inputs[last+1:]) >16:
star = ephem.star(inputs[:start])
star.compute(observer)
a = format(math.cos(float(star.alt)),"4.6f")
b = format((float(star.az)*180)/math.pi,"4.6f")
string = str(a) + "_" +str(b)
else:
planet = getattr(ephem,inputs[:start])
x = planet(observer)
a = format(math.cos(float(x.alt)),"4.6f")
b = format((float(x.az)*180)/math.pi,"4.6f")
string = str(a) + "_" +str(b)
return string
def astronomical_update(self):
observer = ephem.Observer()
observer.date = self.time
observer.lat = self.latitude
observer.lon = self.longitude
ephem_planets = [
ephem.Sun(observer),
ephem.Moon(observer),
ephem.Mercury(observer),
ephem.Venus(observer),
ephem.Mars(observer),
ephem.Jupiter(observer),
ephem.Saturn(observer)
]
ephem_stars = [
ephem.star(star_name, observer) for star_name in STAR_NAMES
]
self.fixed_stars = [
altitudeAzimuth_hermitian(fixed_star.alt, fixed_star.az)
for fixed_star in ephem_stars
]
self.state = ALTITUDEaZIMUTH_v([(planet.alt, planet.az)
for planet in ephem_planets])
self.touched = True
mars = PyEph_body(ephem.Mars(), color.cmyk.Red)
jupiter = PyEph_body(ephem.Jupiter(), color.cmyk.Magenta)
saturn = PyEph_body(ephem.Saturn(), color.cmyk.Yellow)
uranus = PyEph_body(ephem.Uranus(), color.cmyk.SpringGreen)
neptune = PyEph_body(ephem.Neptune(), color.cmyk.ForestGreen)
# some messier objects
m13 = PyEph_body(ephem.readdb("M13,f|C,16:41:42,36:28,5.9,2000,996"),
symbol='m13', tsize='tiny')
m31 = PyEph_body(ephem.readdb("M31,f|G,0:42:44,+41:16:8,4.16,2000,11433|3700|35"),
symbol='m31', tsize='tiny')
m42 = PyEph_body(ephem.readdb("M42,f|U,05:35:18,-05:23,4,2000,3960"),
symbol='m42', tsize='tiny')
m45 = PyEph_body(ephem.readdb("M45,f|U,03:47:0,24:07,1.2,2000,6000"),
symbol='m45', tsize='tiny')
# some bright stars
sirius = PyEph_body(ephem.star('Sirius'), symbol='Sir', tsize='tiny')
antares = PyEph_body(ephem.star('Regulus'), symbol='Ant', tsize='tiny')
deneb = PyEph_body(ephem.star('Deneb'), symbol='Den', tsize='tiny')
betelgeuse = PyEph_body(ephem.star('Betelgeuse'), symbol='Bet', tsize='tiny')
pollux = PyEph_body(ephem.star('Pollux'), symbol='Pol', tsize='tiny')
arcturus = PyEph_body(ephem.star('Arcturus'), symbol='Arc', tsize='tiny')
mercury.rising_text = [
[0.04, '~', 'Merk. doğ.', -1, True],
[0.30, 'Merkür doğuyor', '~', -1, False],
[0.63, 'Merkür', 'doğuyor', -1, True],
[0.85, 'Merkür', 'doğuyor', -1, False]
]
venus.rising_text = [
[0.06, 'Venüs doğuyor', '~', -1, True]
]
def convertCelestialToHorizonNow(job, location): bodyName = job['body'] dt = datetime.datetime.now(); dt = str(dt.year) +'/'+ str(dt.month) +'/'+ str(dt.day) +' '+ str(dt.hour-1) + ':' +str(dt.minute) gatech = ephem.Observer() gatech.epoch = dt if bodyName == "Sun": body = ephem.Sun() elif bodyName == "Moon": body = ephem.Moon() elif bodyName == "Mercury": body = ephem.Mercury() elif bodyName == "Venus": body = ephem.Venus() elif bodyName == "Mars": body = ephem.Mars() elif bodyName == "Phobos": body = ephem.Phobos() elif bodyName == "Deimos": body = ephem.Deimos() elif bodyName == "Jupiter": body = ephem.Jupiter() elif bodyName == "Io": body = ephem.Io() elif bodyName == "Europa": body = ephem.Europa() elif bodyName == "Ganymede": body = ephem.Ganymede() elif bodyName == "Callisto": body = ephem.Callisto() elif bodyName == "Saturn": body = ephem.Saturn() elif bodyName == "Mimas": body = ephem.Mimas() elif bodyName == "Enceladus": body = ephem.Enceladus() elif bodyName == "Tethys": body = ephem.Tethys() elif bodyName == "Dione": body = ephem.Dione() elif bodyName == "Rhea": body = ephem.Rhea() elif bodyName == "Titan": body = ephem.Titan() elif bodyName == "Iapetus": body = ephem.Iapetus() elif bodyName == "Hyperion": body = ephem.Hyperion() elif bodyName == "Uranus": body = ephem.Uranus() elif bodyName == "Miranda": body = ephem.Miranda() elif bodyName == "Ariel": body = ephem.Ariel() elif bodyName == "Umbriel": body = ephem.Umbriel() elif bodyName == "Titania": body = ephem.Titania() elif bodyName == "Oberon": body = ephem.Oberon() elif bodyName == "Neptune": body = ephem.Neptune() elif bodyName == "Pluto": body = ephem.Pluto() else: body = ephem.star(bodyName) geolocator = Nominatim() location = geolocator.geocode(location) gatech.lon, gatech.lat = str(location.longitude), str(location.latitude) gatech.date = dt body.compute(gatech) return body
event_queue.put(ev)
events[ev.key] = ev
body_queue.task_done()
except queue.Empty:
break
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG,
format="%(asctime)s %(levelname)s %(threadName)s %(message)s")
# Load the body queue before we start things up
LONG_LIST = False # long list useful when debugging to have a lot of bodies
comets = Comets()
sun_and_moon = [ephem.Sun(), ephem.Moon()]
planets = [planet() for planet in PLANETS]
if LONG_LIST:
star_list = [ephem.star(name) for name in stars.keys()]
comet_list = list(comets.values())
else:
star_list = []
comet_list = [comets[name] for name in COMETS]
all_bodies = sun_and_moon + planets + star_list + comet_list
for body in all_bodies:
body_queue.put(body)
bodies[body.name] = body
bt = threading.Thread(target=body_consumer, name='BodyConsumer')
bt.start()
logger.debug('BodyConsumer started')
bt.join() # wait for all of them to be added
threading.Thread(target=event_consumer, name='EventConsumer').start()
threading.Thread(target=rescheduler, name='Rescheduler').start()
def select_body(self, name):
"""Return solar system bodies and stars for USNO computations."""
if hasattr(ephem, name):
return getattr(ephem, name)()
else:
return ephem.star(name)
# list out planets
data_planets = {}
planetrybodies = ['Moon','Sun','Mercury','Venus','Mars','Jupiter','Saturn','Uranus','Neptune','Pluto']
for entity in planetrybodies:
spaceentity = getattr(ephem, entity)()
spaceentity.compute(home)
spaceentity_data = {}
spaceentity_data['elevation'] = "%4.1f" % (spaceentity.alt * degrees_per_radian);
spaceentity_data['azimuth'] = "%4.1f" % (spaceentity.az * degrees_per_radian);
data_planets[entity] = spaceentity_data
apiresult['planets']=data_planets
# list out stars
data_stars = {}
stars = ['Polaris','Mizar','Alioth','Megrez','Phecda','Merak','Dubhe']
for entity in stars:
spaceentity = ephem.star(entity)
spaceentity.compute(home)
spaceentity_data = {}
spaceentity_data['elevation'] = "%4.1f" % (spaceentity.alt * degrees_per_radian);
spaceentity_data['azimuth'] = "%4.1f" % (spaceentity.az * degrees_per_radian);
data_stars[entity] = spaceentity_data
apiresult['stars']=data_stars
# output
print "Access-Control-Allow-Origin: *"
print "Content-type: application/json\n\n"
print json.dumps(apiresult)
def compute_star(name):
star = ephem.star(name)
star.compute()
return star
import ephem
gatech = ephem.Observer()
gatech.lon, gatech.lat = '45.54593', '-62.6034'
gatech.date = '2013/09/10 03:13:56'
vega = ephem.star('Vega')
vega.compute(gatech)
vega.az
gatech.date = '2013/09/10 03:23:56'
kochab = ephem.star('Kochab')
kochab.compute(gatech)
kochab.az
gatech.date = '2013/09/10 03:33:56'
altair = ephem.star('Altair')
altair.compute(gatech)
altair.az
gatech.date = '2013/09/10 03:43:56'
alde = ephem.star('Aldebaran')
alde.compute(gatech)
alde.az
gatech.date = '2013/09/10 03:53:56'
fom = ephem.star('Fomalhaut')
fom.compute(gatech)
fom.az
myLocation.lat = '32:54.0'
myLocation.elevation = 2000
else:
sys.exit("Unknown location.");
# Range of acceptable alt and az for stars
minAltitude = 40.
maxAltitude = 85.
# Read a list of the known bright star names
f = open('/Users/dragonfly/Dropbox/src/catalog/stars.txt','r')
lines = f.readlines()
starNames = [n.rstrip() for n in lines]
# Create a list with Star objects
stars = [ephem.star(s) for s in starNames]
# Create a list of altitudes and azimuths. I want these to be stored as
# floats rather than as ephem.Angle types, so I add 0.0 to them. They
# are in units of radians.
alt = []
az = []
for s in stars:
s.compute(myLocation)
alt.append(s.alt + 0.0)
az.append(s.az + 0.0)
# Create a new list of stars at least minAltitude degrees above the horizon but
# less than maxAltitude degrees above the horizon. Sort this list by azimuth.
goodStars = [s for s in stars if (s.alt > minAltitude*math.pi/180. and s.alt < maxAltitude*math.pi/180.)]