def propagate_to_asc_node(o: Orbit):
""" Propagates the orbit to the ascending node."""
an, _, _, __ = calculate_nodes_dist(o)
o_f = o.propagate_to_anomaly(an)
return o_f
def propagate_to_desc_node(o: Orbit):
""" Propagates the orbit to the descending node."""
_, dn, _, _ = calculate_nodes_dist(o)
o_f = o.propagate_to_anomaly(dn)
return o_f
def propagate_to_periapsis(o: Orbit):
""" Propagate given orbit to its periapsis. """
if o.nu != 0 * u.deg:
o_f = o.propagate_to_anomaly(0 * u.deg)
return o_f
return o
