Table 1:
Main constants used in La2004. IAU76 refers to the resolutions of the International Astronmical Union
of 1976, IERS1992, and IERS2000, refers to the IERS conventions (McCarthy 1992; McCarthy & Petit 2004).
Symbol |
Value |
Name |
Ref. |
 |
84 381.448 |
Obliquity of the ecliptic at J2000.0 |
IAU76 |
 |
rad s-1 |
Mean angular velocity of the Earth at J2000.0 |
IERS2000 |
 |
5029.0966 ''/cy |
Precession constant |
IERS2000 |
 |
-0.29965 ''/cy |
Correction to the precession |
IERS2000 |
k2 |
0.305 |
k2 of the Earth |
(Lambeck 1988) |
 |
0.0302 |
k2 of the Moon |
(Yoder 1995) |
 |
639 s |
Time lag of the Earth |
|
 |
7055 s |
Time lag of the Moon |
|
 |
0.0010826362 |
Dynamical form-factor for the Earth |
IERS1992 |
 |
0.000202151 |
Dynamical form-factor for the Moon |
IERS1992 |
 |
 |
Dynamical form-factor for the Sun |
IERS2000 |
 |
6378.1366 km |
Equatorial radius of the Earth |
IERS2000 |
 |
1738 km |
Equatorial radius of the Moon |
IAU76 |
 |
696 000 000 m |
Equatorial radius of the Sun |
IAU76 |
GS |
m3 s-2 |
Heliocentric gravitational constant |
IERS2000 |
 |
6 023 600 |
Sun - Mercury mass ratio |
IERS1992 |
 |
408 523.71 |
Sun - Venus mass ratio |
IERS1992 |
 |
328 900.56 |
Sun - Earth and Moon mass ratio |
IERS1992 |
 |
3 098 708 |
Sun - Mars mass ratio |
IERS1992 |
 |
1047.3486 |
Sun - Jupiter and satellites mass ratio |
IERS1992 |
 |
3497.9 |
Sun - Saturn and satellites mass ratio |
IERS1992 |
 |
22 902.94 |
Sun - Uranus and satellites mass ratio |
IERS1992 |
 |
19 412.24 |
Sun - Neptune and satellites mass ratio |
IERS1992 |
 |
135 000 000 |
Sun - Pluto and Charon mass ratio |
IERS1992 |
 |
0.0123000383 |
Moon-Earth mass ratio |
IERS2000 |