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MGS Interplanetary Orbital Information

The data below were provided by the MGS Navigation Team, and describe the trajectory the MGS spacecraft will be on during its interplanetary phase.


Launch Date: 11/07/96, 17:00:50 UTC

Encounter Date:

At encounter, the one-way, light time = 14 min 9.2 sec

Heliocentric Orbit

Earth Mean Orbit and Equinox of J2000

Epoch of Osculating Orbit Elements And Related Information

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

Email: Pasquale.Esposito@jpl.nasa.gov