Key statistics
Satellite OPS 8781 at a glance.
Uptime
17537
Days in orbit
Revolutions
≈ 14.1
Per day
Orbit
LEO
Low Earth Orbit
Inclination
63.3
Latest
Satellite identification and parameters
Extended collection of information and parameters for OPS 8781.
Object identification
Identified? True
Debris? False
Object name: OPS 8781
International designator: 1977-112A
Object number (NORAD): 10502
Object ID (CCSDS): 10502
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 102.352 minutes
Inclination: 63.3285 deg
SMA: 7248.088 km
Apoapsis: 1224.638 km
Periapsis: 515.268 km
RAAN: 277.2483 deg
Eccentricy: 0.04893497
Argument of periapsis: 159.5087 deg
Mean anomaly: 202.6379 deg
Mean motion: 14.06914171 rev/day
Mean motion (dot): 0.00000785 rev/day2
B* drag term: 0.00018534816 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 10:14 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 12, 2025, 5:43 a.m. UTC
TLE line 0: 0 OPS 8781
TLE line 1: 1 10502U 77112A 25346.23853412 .00000785 00000-0 18535-3 0 9999
TLE line 2: 2 10502 63.3285 277.2483 0489350 159.5087 202.6379 14.06914171 81769
Live tracking on map
Real-time ground track for satellite OPS 8781.
In-orbit conjunctions
There are no conjunctions computed for OPS 8781, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
The Parcae satellites were passive ELINT satellites. MSD satellites were dispensers of triplets of ocean surveillance satellites.
OPS 8781 was lifted into orbit during the mission ‘Atlas F/MSD | Parcae 2A,B,C & MSD 2’, on board a Atlas F/MSD space rocket.
The launch took place on Dec. 8, 1977, 5:45 p.m. from Space Launch Complex 3W.
For more information about the launch, click the button.
Atlas F/MSD | Parcae 2A,B,C & MSD 2
Agency: N/A
Status: Launch Successful
Launch date: Dec. 8, 1977, 5:45 p.m. UTC
Rocket: Atlas F/MSD
Launch pad: Space Launch Complex 3W
Location: Vandenberg SFB, CA, USA
...
Latest news about this satellite
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