Key statistics
Satellite SS 1 at a glance.
Uptime
17483
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: 103.602 minutes
Inclination: 63.3351 deg
SMA: 7307.019 km
Apoapsis: 1323.996 km
Periapsis: 533.772 km
RAAN: 308.3592 deg
Eccentricy: 0.05407299
Argument of periapsis: 159.0821 deg
Mean anomaly: 203.3308 deg
Mean motion: 13.89928305 rev/day
Mean motion (dot): 0.00000782 rev/day2
B* drag term: 0.00022460675 1/REarth
Two-line elements (TLE)
Creation date: Oct. 20, 2025, 2:10 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 19, 2025, 6:15 p.m. UTC
TLE line 0: 0 SS 1
TLE line 1: 1 10529U 77112D 25292.76058522 .00000782 00000-0 22461-3 0 9995
TLE line 2: 2 10529 63.3351 308.3592 0540730 159.0821 203.3308 13.89928305318778
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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