Table 12:
Recognized values for SPECSYS a,
SSYSOBS a, and SSYSSRC a.
| Value |
Definition |
Magnitude |
 |
b |
Reference |
| TOPOCENT |
Topocentric |
0.0 km s-1 |
- |
- |
|
| GEOCENTR |
Geocentric |
0.5 |
- |
- |
|
| BARYCENT |
Barycentric |
30 |
- |
- |
Stumpff (1980) |
| HELIOCEN |
Heliocentric |
30 |
- |
- |
Stumpff (1980) |
| LSRK |
Local standard of rest (kinematic) |
20 |
56 |
23 |
Delhaye (1965), Gordon (1976) |
| LSRD |
Local standard of rest (dynamic) |
16.6 |
53 |
25 |
Delhaye (1965) |
| GALACTOC |
Galactocentric |
220 |
90 |
0 |
Kerr & Lynden-Bell (1986) |
| LOCALGRP |
Local Group |
300 |
90 |
0 |
de Vaucouleurs (1976) |
| CMBDIPOL |
Cosmic microwave background dipole |
368 |
263.85 |
48.25 |
Bennett et al. (2003) |
| SOURCE |
Source rest frame |
any |
- |
- |
|
|
LSRK is normally quoted as right
ascension 18 hours, declination 30 degrees (1900). |