Next: fk5hip, Previous: fix, Up: Internal Routines [Contents][Index]
fk52h, ra5, dec5, dra5, ddec5,
px5, rv5, rah, dech, drah, ddech,
pxh, rvh
[SOFA] Transforms FK5 (J2000.0) star data into the Hipparcos system.
The input FK5 data is: right ascension ra5
(radians),
declination dec5
(radians), proper motion in right
ascension dra5
(dRA/dt, radians per Julian year), proper
motion in declination ddec5
(ddec/dt, radians per Julian
year), parallax px5
(arcseconds), radial velocity
rv5
(km/s, positive receding). The output Hipparcos data
is: right ascension rah
, declination dech
,
proper motion in right ascension drah
, proper motion in
declination ddech
, parallax pxh
, radial
velocity rvh
– with the same units as for the FK5
coordinates.
See also: Astronomical Coordinate Calculations