The data below were provided by the MGS Navigation Team, and describe the trajectory the MGS spacecraft will be on during its interplanetary phase.
At encounter, the one-way, light time = 14 min 9.2 sec
Earth Mean Orbit and Equinox of J2000
|
Orbit Element |
Value |
|
Semi-major Axis ( a, km ) |
185,106,991.1 |
|
Period ( P, days ) |
502.741 274 |
|
Eccentricity ( e ) |
0.207 228 763 |
|
True Anomaly ( deg ) |
Zero |
|
Mean Anomaly ( deg ) |
Zero |
|
|
|
|
Long of Ascending Node ( deg ) |
45.534 369 |
|
Argument of Perihelion ( deg ) |
19.445 019 |
|
Inclination ( deg ) |
1.667 986 |
|
|
|
|
Mean motion ( deg/day ) |
0.716 074 |
|
|
|
|
Related Quantities |
Value |
|
Sun-spacecraft distance ( km ) |
146,747,498. |
|
Sun-Earth distance distance ( km ) |
147,650,589. |
|
Earth-spacecraft distance ( km ) |
4,881,674. |
|
One-way light time ( sec ) |
16.284 |
|
|
|
|
Sun-Earth-spacecraft angle ( deg ) |
78.407 |
|
Earth-spacecraft-Sun angle ( deg ) |
99.726 |
|
Spacecraft-Sun-Earth angle ( deg ) |
1.867 |
|
|
|
|
Spacecraft velocity wrt Sun ( km/s ) |
33.042 |
|
Spacecraft velocity wrt Earth ( km/s ) |
3.078 |
|
|
|
|
Related Quantities |
Value |
|
Celestial Longitude ( deg ) |
64.972 |
|
Celestial Latitude ( deg ) |
0.555 |
|
Right Ascension ( deg ) |
173.418 |
|
Declination ( deg ) |
21.312 |
|
|
|
|
Position; Velocity |
Value |
|
X ( km ) |
62,080,787.8 |
|
Y ( km ) |
132,961,580.9 |
|
Z ( km ) |
1,421,987.1 |
|
|
|
|
X-dot ( km/sec ) |
-29.931 700 |
|
Y-dot ( km/sec ) |
13.965 643 |
|
Z-dot ( km/sec ) |
0.906 916 951 |
|
|
|
|
Conversions and Constants |
|
|
GM Sun ( km**3/s**2 ) |
132,712,440,018. |
|
Astronomical Unit ( km ) |
149,597,870.7 |
|
Speed of light ( km/sec ) |
299,792.458 |
|
1 solar year ( days ) |
365.25 |
Last Update: 11/27/96
Name: Pasquale Esposito