Key statistics
Satellite SS 2 at a glance.
Uptime
17379
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: 103.558 minutes
Inclination: 63.3317 deg
SMA: 7304.932 km
Apoapsis: 1328.35 km
Periapsis: 525.244 km
RAAN: 230.8574 deg
Eccentricy: 0.0549701
Argument of periapsis: 157.3795 deg
Mean anomaly: 205.2527 deg
Mean motion: 13.90524015 rev/day
Mean motion (dot): 0.00000564 rev/day2
B* drag term: 0.00016265 1/REarth
Two-line elements (TLE)
Creation date: July 6, 2025, 6:05 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 6, 2025, 12:15 p.m. UTC
TLE line 0: 0 SS 2
TLE line 1: 1 10544U 77112E 25187.51074078 .00000564 00000-0 16265-3 0 9995
TLE line 2: 2 10544 63.3317 230.8574 0549701 157.3795 205.2527 13.90524015304315
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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