Key statistics
Satellite SS 1 at a glance.
Uptime
17317
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: 103.635 minutes
Inclination: 63.334 deg
SMA: 7308.54 km
Apoapsis: 1338.841 km
Periapsis: 521.969 km
RAAN: 51.6483 deg
Eccentricy: 0.0558848
Argument of periapsis: 156.6401 deg
Mean anomaly: 206.1142 deg
Mean motion: 13.8949444 rev/day
Mean motion (dot): 0.00000858 rev/day2
B* drag term: 0.00022645 1/REarth
Two-line elements (TLE)
Creation date: May 7, 2025, 3:14 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: May 6, 2025, 9:30 p.m. UTC
TLE line 0: 0 SS 1
TLE line 1: 1 10529U 77112D 25126.89647915 .00000858 00000-0 22645-3 0 9993
TLE line 2: 2 10529 63.3340 51.6483 0558848 156.6401 206.1142 13.89494440295723
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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