poliastro2.core.frames.equatorial

Classes

JupiterICRS(*args, **kwargs)
MarsICRS(*args, **kwargs)
MercuryICRS(*args, **kwargs)
MoonICRS(*args, **kwargs)
NeptuneICRS(*args, **kwargs)
SaturnICRS(*args, **kwargs)
UranusICRS(*args, **kwargs)
VenusICRS(*args, **kwargs)

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

A coordinate or frame in the Geocentric Celestial Reference System (GCRS).

GCRS is distinct form ICRS mainly in that it is relative to the Earth’s center-of-mass rather than the solar system Barycenter. That means this frame includes the effects of aberration (unlike ICRS). For more background on the GCRS, see the references provided in the astropy:astropy-coordinates-seealso section of the documentation. (Of particular note is Section 1.2 of USNO Circular 179)

This frame also includes frames that are defined relative to the Earth, but that are offset (in both position and velocity) from the Earth.

The frame attributes are listed under Other Parameters.

Parameters:

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

• ra (~astropy.coordinates.Angle, optional, keyword-only) – The RA for this object (dec must also be given and representation must be None).

• dec (~astropy.coordinates.Angle, optional, keyword-only) – The Declination for this object (ra must also be given and representation must be None).

• distance (~astropy.units.Quantity [‘length’], optional, keyword-only) – The Distance for this object along the line-of-sight. (representation must be None).

• pm_ra_cosdec (~astropy.units.Quantity [‘angular speed’], optional, keyword-only) – The proper motion in Right Ascension (including the cos(dec) factor) for this object (pm_dec must also be given).

• pm_dec (~astropy.units.Quantity [‘angular speed’], optional, keyword-only) – The proper motion in Declination for this object (pm_ra_cosdec must also be given).

• radial_velocity (~astropy.units.Quantity [‘speed’], optional, keyword-only) – The radial velocity of this object.

• 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.

• obsgeoloc (~astropy.coordinates.CartesianRepresentation, ~astropy.units.Quantity) – The position of the observer relative to the center-of-mass of the Earth, oriented the same as BCRS/ICRS. Either [0, 0, 0], ~astropy.coordinates.CartesianRepresentation, or proper input for one, i.e., a ~astropy.units.Quantity with shape (3, …) and length units. Defaults to [0, 0, 0], meaning “true” GCRS.

• obsgeovel (~astropy.coordinates.CartesianRepresentation, ~astropy.units.Quantity) – The velocity of the observer relative to the center-of-mass of the Earth, oriented the same as BCRS/ICRS. Either [0, 0, 0], ~astropy.coordinates.CartesianRepresentation, or proper input for one, i.e., a ~astropy.units.Quantity with shape (3, …) and velocity units. Defaults to [0, 0, 0], meaning “true” GCRS.

_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')]}

property default_differential

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

property default_representation

Default representation for position data

frame_attributes = {'obsgeoloc': <astropy.coordinates.attributes.CartesianRepresentationAttribute object>, 'obsgeovel': <astropy.coordinates.attributes.CartesianRepresentationAttribute object>, 'obstime': <astropy.coordinates.attributes.TimeAttribute object>}

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'gcrs'

obsgeoloc = <CartesianRepresentation (x, y, z) in m     (0., 0., 0.)>

obsgeovel = <CartesianRepresentation (x, y, z) in m / s     (0., 0., 0.)>

obstime = <Time object: scale='tt' format='jyear_str' value=J2000.000>

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

A coordinate or frame in a Heliocentric system, with axes aligned to ICRS.

The ICRS has an origin at the Barycenter and axes which are fixed with respect to space.

This coordinate system is distinct from ICRS mainly in that it is relative to the Sun’s center-of-mass rather than the solar system Barycenter. In principle, therefore, this frame should include the effects of aberration (unlike ICRS), but this is not done, since they are very small, of the order of 8 milli-arcseconds.

For more background on the ICRS and related coordinate transformations, see the references provided in the astropy:astropy-coordinates-seealso section of the documentation.

The frame attributes are listed under Other Parameters.

Parameters:

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

• ra (~astropy.coordinates.Angle, optional, keyword-only) – The RA for this object (dec must also be given and representation must be None).

• dec (~astropy.coordinates.Angle, optional, keyword-only) – The Declination for this object (ra must also be given and representation must be None).

• distance (~astropy.units.Quantity [‘length’], optional, keyword-only) – The Distance for this object along the line-of-sight. (representation must be None).

• pm_ra_cosdec (~astropy.units.Quantity [‘angular speed’], optional, keyword-only) – The proper motion in Right Ascension (including the cos(dec) factor) for this object (pm_dec must also be given).

• pm_dec (~astropy.units.Quantity [‘angular speed’], optional, keyword-only) – The proper motion in Declination for this object (pm_ra_cosdec must also be given).

• radial_velocity (~astropy.units.Quantity [‘speed’], optional, keyword-only) – The radial velocity of this object.

• 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 Sun.

_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')]}

property default_differential

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

property default_representation

Default representation for position data

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

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'hcrs'

obstime = <Time object: scale='tt' format='jyear_str' value=J2000.000>

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

A coordinate or frame in the ICRS system.

If you’re looking for “J2000” coordinates, and aren’t sure if you want to use this or ~astropy.coordinates.FK5, you probably want to use ICRS. It’s more well-defined as a catalog coordinate and is an inertial system, and is very close (within tens of milliarcseconds) to J2000 equatorial.

For more background on the ICRS and related coordinate transformations, see the references provided in the astropy:astropy-coordinates-seealso section of the documentation.

Parameters:

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

• ra (~astropy.coordinates.Angle, optional, keyword-only) – The RA for this object (dec must also be given and representation must be None).

• dec (~astropy.coordinates.Angle, optional, keyword-only) – The Declination for this object (ra must also be given and representation must be None).

• distance (~astropy.units.Quantity [‘length’], optional, keyword-only) – The Distance for this object along the line-of-sight. (representation must be None).

• pm_ra_cosdec (~astropy.units.Quantity [‘angular speed’], optional, keyword-only) – The proper motion in Right Ascension (including the cos(dec) factor) for this object (pm_dec must also be given).

• pm_dec (~astropy.units.Quantity [‘angular speed’], optional, keyword-only) – The proper motion in Declination for this object (pm_ra_cosdec must also be given).

• radial_velocity (~astropy.units.Quantity [‘speed’], optional, keyword-only) – The radial velocity of this object.

• 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.

_abc_impl = <_abc._abc_data object>

_default_differential

alias of SphericalCosLatDifferential

_default_representation

alias of SphericalRepresentation

_frame_class_cache = {'last_reprdiff_hash': -6140115520439771869, 'representation_info': {<class 'astropy.coordinates.earth.BaseGeodeticRepresentation'>: {'names': ['lon', 'lat', 'height'], 'units': [Unit("deg"), Unit("deg"), None]}, <class 'astropy.coordinates.earth.GRS80GeodeticRepresentation'>: {'names': ['lon', 'lat', 'height'], 'units': [Unit("deg"), Unit("deg"), None]}, <class 'astropy.coordinates.earth.WGS72GeodeticRepresentation'>: {'names': ['lon', 'lat', 'height'], 'units': [Unit("deg"), Unit("deg"), None]}, <class 'astropy.coordinates.earth.WGS84GeodeticRepresentation'>: {'names': ['lon', 'lat', 'height'], 'units': [Unit("deg"), Unit("deg"), None]}, <class 'astropy.coordinates.representation.CartesianDifferential'>: {'names': ('v_x', 'v_y', 'v_z'), 'units': (Unit("km / s"), Unit("km / s"), Unit("km / s"))}, <class 'astropy.coordinates.representation.CartesianRepresentation'>: {'names': ['x', 'y', 'z'], 'units': [None, None, None]}, <class 'astropy.coordinates.representation.CylindricalDifferential'>: {'names': ['d_rho', 'd_phi', 'd_z'], 'units': [None, None, None]}, <class 'astropy.coordinates.representation.CylindricalRepresentation'>: {'names': ['rho', 'phi', 'z'], 'units': [None, Unit("deg"), None]}, <class 'astropy.coordinates.representation.PhysicsSphericalDifferential'>: {'names': ['d_phi', 'd_theta', 'd_r'], 'units': [None, None, None]}, <class 'astropy.coordinates.representation.PhysicsSphericalRepresentation'>: {'names': ['phi', 'theta', 'r'], 'units': [Unit("deg"), Unit("deg"), None]}, <class 'astropy.coordinates.representation.RadialDifferential'>: {'names': ['d_distance'], 'units': [None]}, <class 'astropy.coordinates.representation.RadialRepresentation'>: {'names': ['distance'], 'units': [None]}, <class 'astropy.coordinates.representation.SphericalCosLatDifferential'>: {'names': ('pm_ra_cosdec', 'pm_dec', 'radial_velocity'), 'units': (Unit("mas / yr"), Unit("mas / yr"), Unit("km / s"))}, <class 'astropy.coordinates.representation.SphericalDifferential'>: {'names': ('pm_ra', 'pm_dec', 'radial_velocity'), 'units': (Unit("mas / yr"), Unit("mas / yr"), Unit("km / s"))}, <class 'astropy.coordinates.representation.SphericalRepresentation'>: {'names': ('ra', 'dec', 'distance'), 'units': (Unit("deg"), Unit("deg"), None)}, <class 'astropy.coordinates.representation.UnitSphericalCosLatDifferential'>: {'names': ('pm_ra_cosdec', 'pm_dec'), 'units': (Unit("mas / yr"), Unit("mas / yr"))}, <class 'astropy.coordinates.representation.UnitSphericalDifferential'>: {'names': ('pm_ra', 'pm_dec'), 'units': (Unit("mas / yr"), Unit("mas / yr"))}, <class 'astropy.coordinates.representation.UnitSphericalRepresentation'>: {'names': ('ra', 'dec'), 'units': (Unit("deg"), Unit("deg"))}}}

_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')]}

property default_differential

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

property default_representation

Default representation for position data

frame_attributes = {}

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'icrs'

class poliastro2.core.frames.equatorial.JupiterICRS(*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')]}

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

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

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'jupitericrs'

class poliastro2.core.frames.equatorial.MarsICRS(*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')]}

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

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

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'marsicrs'

class poliastro2.core.frames.equatorial.MercuryICRS(*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')]}

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

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

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'mercuryicrs'

class poliastro2.core.frames.equatorial.NeptuneICRS(*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')]}

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

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

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'neptuneicrs'

class poliastro2.core.frames.equatorial.SaturnICRS(*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')]}

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

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

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'saturnicrs'

class poliastro2.core.frames.equatorial.UranusICRS(*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')]}

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

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

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'uranusicrs'

class poliastro2.core.frames.equatorial.VenusICRS(*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')]}

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

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

property frame_specific_representation_info

Mapping for frame-specific component names

name = 'venusicrs'