THIS SUBROUTINE COMPUTES THE ICRS POSITION OF A STAR, GIVEN ITS APPARENT PLACE AT DATE TJD. PROPER MOTION, PARALLAX, AND RADIAL VELOCITY ARE ASSUMED TO BE ZERO.
TJD = TT JULIAN DATE OF APPARENT PLACE (IN)
N = BODY IDENTIFICATION NUMBER FOR THE EARTH (IN)
(NO LONGER USED)
RA = APPARENT RIGHT ASCENSION IN HOURS, REFERRED TO
TRUE EQUATOR AND EQUINOX OF DATE (IN)
DEC = APPARENT DECLINATION IN DEGREES, REFERRED TO
TRUE EQUATOR OF DATE (IN)
RAI = ICRS RIGHT ASCENSION IN HOURS (OUT)
DECI = ICRS DECLINATION IN DEGREES (OUT)
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
real(kind=wp) | :: | tjd | ||||
integer | :: | n | ||||
real(kind=wp) | :: | ra | ||||
real(kind=wp) | :: | dec | ||||
real(kind=wp) | :: | rai | ||||
real(kind=wp) | :: | deci |