poliastro2.core.frames.fixed

Classes

JupiterFixed(*args, **kwargs)

MarsFixed(*args, **kwargs)

MercuryFixed(*args, **kwargs)

MoonFixed(*args, **kwargs)

NeptuneFixed(*args, **kwargs)

SaturnFixed(*args, **kwargs)

SunFixed(*args, **kwargs)

UranusFixed(*args, **kwargs)

VenusFixed(*args, **kwargs)

class poliastro2.core.frames.fixed.ITRS(*args, copy=True, representation_type=None, differential_type=None, **kwargs)

A coordinate or frame in the International Terrestrial Reference System (ITRS). This is approximately a geocentric system, although strictly it is defined by a series of reference locations near the surface of the Earth (the ITRF). For more background on the ITRS, see the references provided in the astropy:astropy-coordinates-seealso section of the documentation.

This frame also includes frames that are defined relative to the center of the Earth, but that are offset (in both position and velocity) from the center of the Earth. You may see such non-geocentric coordinates referred to as “topocentric”.

Topocentric ITRS frames are convenient for observations of near Earth objects where stellar aberration is not included. One can merely subtract the observing site’s EarthLocation geocentric ITRS coordinates from the object’s geocentric ITRS coordinates, put the resulting vector into a topocentric ITRS frame and then transform to ~astropy.coordinates.AltAz or ~astropy.coordinates.HADec. The other way around is to transform an observed ~astropy.coordinates.AltAz or ~astropy.coordinates.HADec position to a topocentric ITRS frame and add the observing site’s EarthLocation geocentric ITRS coordinates to yield the object’s geocentric ITRS coordinates.

On the other hand, using transform_to to transform geocentric ITRS coordinates to topocentric ITRS, observed ~astropy.coordinates.AltAz, or observed ~astropy.coordinates.HADec coordinates includes the difference between stellar aberration from the point of view of an observer at the geocenter and stellar aberration from the point of view of an observer on the surface of the Earth. If the geocentric ITRS coordinates of the object include stellar aberration at the geocenter (e.g. certain ILRS ephemerides), then this is the way to go.

Note to ILRS ephemeris users: Astropy does not currently consider relativistic effects of the Earth’s gravatational field. Nor do the ~astropy.coordinates.AltAz or ~astropy.coordinates.HADec refraction corrections compute the change in the range due to the curved path of light through the atmosphere, so Astropy is no substitute for the ILRS software in these respects.

Parameters:

  • data (~astropy.coordinates.BaseRepresentation subclass instance) – A representation object or None to have no data (or use the coordinate component arguments, see below).

  • representation_type (~astropy.coordinates.BaseRepresentation subclass, str, optional) – A representation class or string name of a representation class. This sets the expected input representation class, thereby changing the expected keyword arguments for the data passed in. For example, passing representation_type='cartesian' will make the classes expect position data with cartesian names, i.e. x, y, z in most cases unless overridden via frame_specific_representation_info. To see this frame’s names, check out <this frame>().representation_info.

  • differential_type (~astropy.coordinates.BaseDifferential subclass, str, dict, optional) – A differential class or dictionary of differential classes (currently only a velocity differential with key ‘s’ is supported). This sets the expected input differential class, thereby changing the expected keyword arguments of the data passed in. For example, passing differential_type='cartesian' will make the classes expect velocity data with the argument names v_x, v_y, v_z unless overridden via frame_specific_representation_info. To see this frame’s names, check out <this frame>().representation_info.

  • copy (bool, optional) – If True (default), make copies of the input coordinate arrays. Can only be passed in as a keyword argument.

  • obstime (~astropy.time.Time) – The time at which the observation is taken. Used for determining the position of the Earth and its precession.

  • location (~astropy.coordinates.EarthLocation) – The location on the Earth. This can be specified either as an ~astropy.coordinates.EarthLocation object or as anything that can be transformed to an ~astropy.coordinates.ITRS frame. The default is the centre of the Earth.

_abc_impl = <_abc._abc_data object>
_default_differential

alias of CartesianDifferential

_default_representation

alias of CartesianRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_lon_coslat', Unit("mas / yr")), ('d_lat', 'pm_lat', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_lon', Unit("mas / yr")), ('d_lat', 'pm_lat', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'lon', 'recommended'), ('lat', 'lat', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_lon_coslat', Unit("mas / yr")), ('d_lat', 'pm_lat', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_lon', Unit("mas / yr")), ('d_lat', 'pm_lat', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'lon', 'recommended'), ('lat', 'lat', 'recommended')]}
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

property earth_location

The data in this frame as an ~astropy.coordinates.EarthLocation class.

frame_attributes = {'location': <astropy.coordinates.attributes.EarthLocationAttribute object>, 'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

location = <EarthLocation (0., 0., 0.) km>
name = 'itrs'
obstime = <Time object: scale='tt' format='jyear_str' value=J2000.000>
class poliastro2.core.frames.fixed.JupiterFixed(*args, **kwargs)
_abc_impl = <_abc._abc_data object>
_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')]}
static _rot_elements_at_epoch(T, d)
body = ((None, <Quantity 1.32712442e+20 m3 / s2>, 'Sun', '☉', <Quantity 6.957e+08 m>, <Quantity 0. km>, <Quantity 0. km>, <Quantity 25.38 d>, <Quantity 2.2e-07>, <Quantity 0.>, <Quantity 1.98840987e+30 kg>, <Quantity 0. km>), <Quantity 1.26712763e+17 m3 / s2>, 'Jupiter', '♃', <Quantity 71492000. m>, <Quantity 66854000. m>, <Quantity 69911000. m>, <Quantity 0.41354 d>, <Quantity 0.>, <Quantity 0.>, <Quantity 1.8981246e+27 kg>, <Quantity 7.78340817e+08 km>)
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

equatorial

alias of JupiterICRS

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

name = 'jupiterfixed'
class poliastro2.core.frames.fixed.MarsFixed(*args, **kwargs)
_abc_impl = <_abc._abc_data object>
_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')]}
static _rot_elements_at_epoch(T, d)
body = ((None, <Quantity 1.32712442e+20 m3 / s2>, 'Sun', '☉', <Quantity 6.957e+08 m>, <Quantity 0. km>, <Quantity 0. km>, <Quantity 25.38 d>, <Quantity 2.2e-07>, <Quantity 0.>, <Quantity 1.98840987e+30 kg>, <Quantity 0. km>), <Quantity 4.28283744e+13 m3 / s2>, 'Mars', '♂', <Quantity 3396190. m>, <Quantity 3376220. m>, <Quantity 3389500. m>, <Quantity 1.02595675 d>, <Quantity 0.0019555>, <Quantity 3.145e-05>, <Quantity 6.4169088e+23 kg>, <Quantity 2.27943822e+08 km>)
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

equatorial

alias of MarsICRS

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

name = 'marsfixed'
class poliastro2.core.frames.fixed.MercuryFixed(*args, **kwargs)
_abc_impl = <_abc._abc_data object>
_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')]}
static _rot_elements_at_epoch(T, d)
body = ((None, <Quantity 1.32712442e+20 m3 / s2>, 'Sun', '☉', <Quantity 6.957e+08 m>, <Quantity 0. km>, <Quantity 0. km>, <Quantity 25.38 d>, <Quantity 2.2e-07>, <Quantity 0.>, <Quantity 1.98840987e+30 kg>, <Quantity 0. km>), <Quantity 2.203209e+13 m3 / s2>, 'Mercury', '☿', <Quantity 2440530. m>, <Quantity 2438260. m>, <Quantity 2439400. m>, <Quantity 58.6462 d>, <Quantity 0.>, <Quantity 0.>, <Quantity 3.30103382e+23 kg>, <Quantity 57909226.54152438 km>)
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

equatorial

alias of MercuryICRS

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

name = 'mercuryfixed'
class poliastro2.core.frames.fixed.NeptuneFixed(*args, **kwargs)
_abc_impl = <_abc._abc_data object>
_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')]}
static _rot_elements_at_epoch(T, d)
body = ((None, <Quantity 1.32712442e+20 m3 / s2>, 'Sun', '☉', <Quantity 6.957e+08 m>, <Quantity 0. km>, <Quantity 0. km>, <Quantity 25.38 d>, <Quantity 2.2e-07>, <Quantity 0.>, <Quantity 1.98840987e+30 kg>, <Quantity 0. km>), <Quantity 6.8365271e+15 m3 / s2>, 'Neptune', '♆', <Quantity 24764000. m>, <Quantity 24341000. m>, <Quantity 24622000. m>, <Quantity 0.768 d>, <Quantity 0.>, <Quantity 0.>, <Quantity 1.02430623e+26 kg>, <Quantity 4.49839642e+09 km>)
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

equatorial

alias of NeptuneICRS

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

name = 'neptunefixed'
class poliastro2.core.frames.fixed.SaturnFixed(*args, **kwargs)
_abc_impl = <_abc._abc_data object>
_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')]}
static _rot_elements_at_epoch(T, d)
body = ((None, <Quantity 1.32712442e+20 m3 / s2>, 'Sun', '☉', <Quantity 6.957e+08 m>, <Quantity 0. km>, <Quantity 0. km>, <Quantity 25.38 d>, <Quantity 2.2e-07>, <Quantity 0.>, <Quantity 1.98840987e+30 kg>, <Quantity 0. km>), <Quantity 3.79312077e+16 m3 / s2>, 'Saturn', '♄', <Quantity 60268000. m>, <Quantity 54364000. m>, <Quantity 58232000. m>, <Quantity 0.4375 d>, <Quantity 0.>, <Quantity 0.>, <Quantity 5.68317392e+26 kg>, <Quantity 1.42666641e+09 km>)
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

equatorial

alias of SaturnICRS

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

name = 'saturnfixed'
class poliastro2.core.frames.fixed.SunFixed(*args, **kwargs)
_abc_impl = <_abc._abc_data object>
_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')]}
static _rot_elements_at_epoch(T, d)
body = (None, <Quantity 1.32712442e+20 m3 / s2>, 'Sun', '☉', <Quantity 6.957e+08 m>, <Quantity 0. km>, <Quantity 0. km>, <Quantity 25.38 d>, <Quantity 2.2e-07>, <Quantity 0.>, <Quantity 1.98840987e+30 kg>, <Quantity 0. km>)
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

equatorial

alias of HCRS

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

name = 'sunfixed'
class poliastro2.core.frames.fixed.UranusFixed(*args, **kwargs)
_abc_impl = <_abc._abc_data object>
_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')]}
static _rot_elements_at_epoch(T, d)
body = ((None, <Quantity 1.32712442e+20 m3 / s2>, 'Sun', '☉', <Quantity 6.957e+08 m>, <Quantity 0. km>, <Quantity 0. km>, <Quantity 25.38 d>, <Quantity 2.2e-07>, <Quantity 0.>, <Quantity 1.98840987e+30 kg>, <Quantity 0. km>), <Quantity 5.7939393e+15 m3 / s2>, 'Uranus', '⛢', <Quantity 25559000. m>, <Quantity 24973000. m>, <Quantity 25362000. m>, <Quantity -0.65 d>, <Quantity 0.>, <Quantity 0.>, <Quantity 8.68096924e+25 kg>, <Quantity 2.87065817e+09 km>)
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

equatorial

alias of UranusICRS

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

name = 'uranusfixed'
class poliastro2.core.frames.fixed.VenusFixed(*args, **kwargs)
_abc_impl = <_abc._abc_data object>
_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {}
_frame_specific_representation_info = {<class 'astropy.coordinates.representation.CartesianDifferential'>: [('d_x', 'v_x', Unit("km / s")), ('d_y', 'v_y', Unit("km / s")), ('d_z', 'v_z', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.SphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')], <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: [('d_lon_coslat', 'pm_ra_cosdec', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: [('d_lon', 'pm_ra', Unit("mas / yr")), ('d_lat', 'pm_dec', Unit("mas / yr")), ('d_distance', 'radial_velocity', Unit("km / s"))], <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: [('lon', 'ra', 'recommended'), ('lat', 'dec', 'recommended')]}
static _rot_elements_at_epoch(T, d)
body = ((None, <Quantity 1.32712442e+20 m3 / s2>, 'Sun', '☉', <Quantity 6.957e+08 m>, <Quantity 0. km>, <Quantity 0. km>, <Quantity 25.38 d>, <Quantity 2.2e-07>, <Quantity 0.>, <Quantity 1.98840987e+30 kg>, <Quantity 0. km>), <Quantity 3.24858592e+14 m3 / s2>, 'Venus', '♀', <Quantity 6051800. m>, <Quantity 6051800. m>, <Quantity 6051800. m>, <Quantity -243.01 d>, <Quantity 4.4044e-06>, <Quantity -2.1082e-06>, <Quantity 4.86730581e+24 kg>, <Quantity 1.08209475e+08 km>)
property default_differential

Default representation for differential data (e.g., velocity)

property default_representation

Default representation for position data

equatorial

alias of VenusICRS

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
property frame_specific_representation_info

Mapping for frame-specific component names

name = 'venusfixed'