-
ACTION:
- Add the E-terms (elliptic component of annual aberration) to a pre IAU 1976 mean
place to conform to the old catalogue convention.
-
CALL:
CALL sla_ADDET (RM, DM, EQ, RC, DC)
GIVEN:
RM,DM | D | without
E-terms (radians) |
|
EQ | D | Besselian epoch of mean equator and equinox |
|
RETURNED:
RC,DC | D | with
E-terms included (radians) |
|
-
NOTE:
- Most star positions from pre-1984 optical catalogues (or obtained by astrometry with
respect to such stars) have the E-terms built-in. If it is necessary to convert a formal mean
place (for example a pulsar timing position) to one consistent with such a star catalogue,
then the should
be adjusted using this routine.
-
REFERENCE:
- Explanatory Supplement to the Astronomical Ephemeris, section 2D, page 48.