co_aberration {astrolibR} | R Documentation |
Calculate changes to right ascension and declination due to astronomical aberration
co_aberration(jd, ra, dec, eps)
jd |
Julian Date [scalar or vector] |
ra |
right ascension, in degrees (scalar or N-vector) |
dec |
declination, in degrees (scalar or N-vector) |
eps |
true obliquity of the ecliptic, in radians (optional), |
Algorithm described in Meeus (1991), Chap 23. Accuracy is much better than 1 arcsecond.
d_ra |
corrections to ra due to aberration (must then be added to ra to get corrected values). |
d_dec |
corrections to dec due to aberration (must then be added to dec to get corrected values). |
eps |
true obliquity of the ecliptic (in radians). |
Original IDL program by Chris O'Dell, U. of Wisconsin (June 2002)
R adaptation by Arnab Chakraborty (June 2013)
Meeus, J., Astronomical Algorithms, Willmann-Bell, 1991
co_aberration(2456469.5,253.215,-32.449)