Key statistics
Satellite SS 1 at a glance.
Uptime
17438
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: 103.616 minutes
Inclination: 63.3347 deg
SMA: 7307.671 km
Apoapsis: 1328.649 km
Periapsis: 530.424 km
RAAN: 76.5899 deg
Eccentricy: 0.05461557
Argument of periapsis: 158.4075 deg
Mean anomaly: 204.1003 deg
Mean motion: 13.89742217 rev/day
Mean motion (dot): 0.00002515 rev/day2
B* drag term: 0.00063203385 1/REarth
Two-line elements (TLE)
Creation date: Sept. 4, 2025, 4:29 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 3, 2025, 8:33 p.m. UTC
TLE line 0: 0 SS 1
TLE line 1: 1 10529U 77112D 25246.85633077 .00002515 00000-0 63203-3 0 9993
TLE line 2: 2 10529 63.3347 76.5899 0546156 158.4075 204.1003 13.89742217312398
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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