Key statistics
Satellite SS 1 at a glance.
Uptime
17537
Days in orbit
Revolutions
≈ 13.9
Per day
Orbit
LEO
Low Earth Orbit
Inclination
63.3
Latest
Satellite identification and parameters
Extended collection of information and parameters for SS 1.
Object identification
Identified? True
Debris? False
Object name: SS 1
International designator: 1977-112D
Object number (NORAD): 10529
Object ID (CCSDS): 10529
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 103.594 minutes
Inclination: 63.3349 deg
SMA: 7306.635 km
Apoapsis: 1319.418 km
Periapsis: 537.581 km
RAAN: 159.026 deg
Eccentricy: 0.05350186
Argument of periapsis: 159.8645 deg
Mean anomaly: 202.4421 deg
Mean motion: 13.90038042 rev/day
Mean motion (dot): 0.00002057 rev/day2
B* drag term: 0.00054632986 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, 5:09 a.m. UTC
TLE line 0: 0 SS 1
TLE line 1: 1 10529U 77112D 25346.21466301 .00002057 00000-0 54633-3 0 9996
TLE line 2: 2 10529 63.3349 159.0260 0535019 159.8645 202.4421 13.90038042326209
Live tracking on map
Real-time ground track for satellite SS 1.
In-orbit conjunctions
A list of the most updated potential collisions computed for object SS 1.
Associated space launch
The Parcae satellites were passive ELINT satellites. MSD satellites were dispensers of triplets of ocean surveillance satellites.
SS 1 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
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