Key statistics
Satellite SS 2 at a glance.
Uptime
17439
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 2.
Object identification
Identified? True
Debris? False
Object name: SS 2
International designator: 1977-112E
Object number (NORAD): 10544
Object ID (CCSDS): 10544
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 103.549 minutes
Inclination: 63.3346 deg
SMA: 7304.526 km
Apoapsis: 1323.037 km
Periapsis: 529.746 km
RAAN: 59.2766 deg
Eccentricy: 0.05430133
Argument of periapsis: 158.2641 deg
Mean anomaly: 204.2444 deg
Mean motion: 13.90639862 rev/day
Mean motion (dot): 0.00002748 rev/day2
B* drag term: 0.0006814814 1/REarth
Two-line elements (TLE)
Creation date: Sept. 6, 2025, 2:09 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 5, 2025, 8:27 p.m. UTC
TLE line 0: 0 SS 2
TLE line 1: 1 10544U 77112E 25248.85260311 .00002748 00000-0 68148-3 0 9990
TLE line 2: 2 10544 63.3346 59.2766 0543013 158.2641 204.2444 13.90639862312844
Live tracking on map
Real-time ground track for satellite SS 2.
In-orbit conjunctions
A list of the most updated potential collisions computed for object SS 2.
Associated space launch
The Parcae satellites were passive ELINT satellites. MSD satellites were dispensers of triplets of ocean surveillance satellites.
SS 2 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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