Key statistics
Satellite SS 1 at a glance.
Uptime
17378
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: 103.623 minutes
Inclination: 63.3325 deg
SMA: 7307.999 km
Apoapsis: 1333.667 km
Periapsis: 526.06 km
RAAN: 242.0048 deg
Eccentricy: 0.055255
Argument of periapsis: 157.55 deg
Mean anomaly: 205.0778 deg
Mean motion: 13.89648799 rev/day
Mean motion (dot): 0.00000618 rev/day2
B* drag term: 0.00017666 1/REarth
Two-line elements (TLE)
Creation date: July 6, 2025, 10:56 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 6, 2025, 3:13 p.m. UTC
TLE line 0: 0 SS 1
TLE line 1: 1 10529U 77112D 25187.63442963 .00000618 00000-0 17666-3 0 9999
TLE line 2: 2 10529 63.3325 242.0048 0552550 157.5500 205.0778 13.89648799304141
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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