fk52h¶
-
erfa.
fk52h
(r5, d5, dr5, dd5, px5, rv5)[source]¶ Wrapper for ERFA function
eraFk52h
.- Parameters
r5 : double array
d5 : double array
dr5 : double array
dd5 : double array
px5 : double array
rv5 : double array
- Returns
rh : double array
dh : double array
drh : double array
ddh : double array
pxh : double array
rvh : double array
Notes
The ERFA documentation is below.
- - - - - - - - - e r a F k 5 2 h - - - - - - - - - Transform FK5 (J2000.0) star data into the Hipparcos system. Given (all FK5, equinox J2000.0, epoch J2000.0): r5 double RA (radians) d5 double Dec (radians) dr5 double proper motion in RA (dRA/dt, rad/Jyear) dd5 double proper motion in Dec (dDec/dt, rad/Jyear) px5 double parallax (arcsec) rv5 double radial velocity (km/s, positive = receding) Returned (all Hipparcos, epoch J2000.0): rh double RA (radians) dh double Dec (radians) drh double proper motion in RA (dRA/dt, rad/Jyear) ddh double proper motion in Dec (dDec/dt, rad/Jyear) pxh double parallax (arcsec) rvh double radial velocity (km/s, positive = receding) Notes: 1) This function transforms FK5 star positions and proper motions into the system of the Hipparcos catalog. 2) The proper motions in RA are dRA/dt rather than cos(Dec)*dRA/dt, and are per year rather than per century. 3) The FK5 to Hipparcos transformation is modeled as a pure rotation and spin; zonal errors in the FK5 catalog are not taken into account. 4) See also eraH2fk5, eraFk5hz, eraHfk5z. Called: eraStarpv star catalog data to space motion pv-vector eraFk5hip FK5 to Hipparcos rotation and spin eraRxp product of r-matrix and p-vector eraPxp vector product of two p-vectors eraPpp p-vector plus p-vector eraPvstar space motion pv-vector to star catalog data Reference: F.Mignard & M.Froeschle, Astron.Astrophys., 354, 732-739 (2000). Copyright (C) 2013-2019, NumFOCUS Foundation. Derived, with permission, from the SOFA library. See notes at end of file.