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- Astropy v5.2.1 »
- Astronomical Coordinate Systems (`astropy.coordinates`) »
- LSRK

# LSRK

class astropy.coordinates.LSRK(*args, copy=True, representation_type=None, differential_type=None, **kwargs)

  Bases: `BaseRADecFrame`

  A coordinate or frame in the Kinematic Local Standard of Rest (LSR).

  This frame is defined as having a velocity of 20 km/s towards RA=270 Dec=30 (B1900) relative to the solar system Barycenter. This is defined in:

  > Gordon 1975, Methods of Experimental Physics: Volume 12: Astrophysics, Part C: Radio Observations - Section 6.1.5.

  This coordinate frame is axis-aligned and co-spatial with `ICRS`, but has a velocity offset relative to the solar system barycenter to remove the peculiar motion of the sun relative to the LSRK.

  Attributes Summary

  `default_differential` | Default representation for differential data (e.g., velocity)
  `default_representation` | Default representation for position data
  `frame_attributes` |
  `frame_specific_representation_info` | Mapping for frame-specific component names
  `name` |

  Attributes Documentation

  default_differential

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

  default_representation

    Default representation for position data

  frame_attributes = {}
  frame_specific_representation_info

    Mapping for frame-specific component names

  name = 'lsrk'