Neptune¶

Class to model Neptune planet.

Neptune examples

Neptune - VSOP87-Parameters

class pyplanets.planets.neptune.Neptune(epoch)[source]¶

Class Neptune models that planet.

__init__(epoch)[source]¶

Initializes an object of type planet for a given date (epoch) with: its orbital parameters (ephemeredes) given by VSOP87.

Parameters: epoch (Epoch) – Epoch to which all computations of this instance refer, as an Epoch object
Raises: TypeError if epoch is of wrong type.

aphelion() → pyplanets.core.epoch.Epoch [source]¶

This method computes the time of Aphelion closest to the epoch of initialization. Subclasses are required to implement this method.

Returns: The epoch of the desired Aphelion
Return type: Epoch

conjunction() → pyplanets.core.epoch.Epoch [source]¶

This method computes the time of the conjunction closest to the given epoch.

Returns: The time when the conjunction happens, as an Epoch
Return type: Epoch
Raises: ValueError if input epoch outside the -2000/4000 range.

>>> epoch = Epoch(1993, 10, 1.0)
>>> conj = Neptune(epoch).conjunction()
>>> y, m, d = conj.get_date()
>>> print(y)
1994
>>> print(m)
1
>>> print(round(d, 4))
11.3057

magnitude(sun_dist, earth_dist)[source]¶

This function computes the approximate magnitude of Neptune.

Parameters

sun_dist (float) – Distance from Neptune to Sun, in Astronomical Units
earth_dist (float) – Distance Neptune to Earth, in Astronomical Units

Returns

Neptune’s magnitude

Return type

float

opposition() → pyplanets.core.epoch.Epoch [source]¶

This method computes the time of the opposition closest to the given epoch.

Returns: The time when the opposition happens, as an Epoch
Return type: Epoch
Raises: ValueError if input epoch outside the -2000/4000 range.

>>> epoch = Epoch(1846, 8, 1)
>>> oppo = Neptune(epoch).opposition()
>>> y, m, d = oppo.get_date()
>>> print(y)
1846
>>> print(m)
8
>>> print(round(d, 4))
20.1623

perihelion() → pyplanets.core.epoch.Epoch [source]¶

This method computes the time of Perihelion closest to the epoch of initialization. Subclasses are required to implement this method.

Returns: The epoch of the desired Perihelion
Return type: Epoch