def test_true_declination_J2000(t1, t2):
# Validate against JPL HORIZONS output
# https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&TABLE_TYPE=OBSERVER&COMMAND=10&CENTER=500&QUANTITIES=1&ANG_FORMAT=HMS&EXTRA_PREC=YES&TIME_TYPE=TT&TLIST=2448908.5%0A2456460.5
assert_quantity_allclose(sun.true_declination(t1, equinox_of_date=False),
Angle('-7d49m20.84s'), atol=0.005*u.arcsec)
assert_quantity_allclose(sun.true_declination(t2, equinox_of_date=False),
Angle('23d22m13.97s'), atol=0.005*u.arcsec)
def test_true_declination():
# Regression-only test
assert_quantity_allclose(sun.true_declination("2012/11/11"),
-17.470 * u.deg,
atol=1e-3 * u.deg)
with pytest.warns(ErfaWarning):
assert_quantity_allclose(sun.true_declination("2245/12/01"),
-21.717 * u.deg,
atol=1e-3 * u.deg)
assert_quantity_allclose(sun.true_declination("2014/05/27"),
21.245 * u.deg,
atol=1e-3 * u.deg)