Key statistics
Satellite SPACENET 4 (ASC 2) at a glance.
Uptime
12567
Days in orbit
Revolutions
≈ 1.0
Per day
Orbit
OTHER
Other
Inclination
13.5
Latest
Satellite identification and parameters
Extended collection of information and parameters for SPACENET 4 (ASC 2).
Object identification
Identified? True
Debris? False
Object name: SPACENET 4 (ASC 2)
International designator: 1991-028A
Object number (NORAD): 21227
Object ID (CCSDS): 21227
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 1446.237 minutes
Inclination: 13.5139 deg
SMA: 42362.988 km
Apoapsis: 36005.891 km
Periapsis: 35963.815 km
RAAN: 15.8961 deg
Eccentricy: 0.00049661
Argument of periapsis: 292.9114 deg
Mean anomaly: 60.385 deg
Mean motion: 0.99568711 rev/day
Mean motion (dot): 0.0000006 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: Sept. 8, 2025, 3:16 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 7, 2025, 11:44 a.m. UTC
TLE line 0: 0 SPACENET 4 (ASC 2)
TLE line 1: 1 21227U 91028A 25250.48952323 .00000060 00000-0 00000-0 0 9990
TLE line 2: 2 21227 13.5139 15.8961 0004966 292.9114 60.3850 0.99568711123555
Live tracking on map
Real-time ground track for satellite SPACENET 4 (ASC 2).
In-orbit conjunctions
There are no conjunctions computed for SPACENET 4 (ASC 2), at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
The ASC series consisted of three satellites built by GE Astro-Space for Contel ASC and carried 18 C-band and 6 Ku-band transponders for TV news and interactive data transmissions to private networks and small terminals.
SPACENET 4 (ASC 2) was lifted into orbit during the mission ‘Delta II | ASC 2’, on board a Delta II space rocket.
The launch took place on April 13, 1991, 12:09 a.m. from Space Launch Complex 17B.
For more information about the launch, click the button.
Delta II | ASC 2
Agency: N/A
Status: Launch Successful
Launch date: April 13, 1991, 12:09 a.m. UTC
Rocket: Delta II
Launch pad: Space Launch Complex 17B
Location: Cape Canaveral SFS, FL, USA
...
Latest news about this satellite
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