Key statistics
Satellite SPACENET 4 (ASC 2) at a glance.
Uptime
12666
Days in orbit
Revolutions
≈ 1.0
Per day
Orbit
OTHER
Other
Inclination
13.6
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: 1446.225 minutes
Inclination: 13.5991 deg
SMA: 42362.749 km
Apoapsis: 36015.941 km
Periapsis: 35953.286 km
RAAN: 15.1927 deg
Eccentricy: 0.00073951
Argument of periapsis: 292.2644 deg
Mean anomaly: 57.6538 deg
Mean motion: 0.99569554 rev/day
Mean motion (dot): -0.00000273 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: Dec. 16, 2025, 2:19 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 15, 2025, 9:43 p.m. UTC
TLE line 0: 0 SPACENET 4 (ASC 2)
TLE line 1: 1 21227U 91028A 25349.90550668 -.00000273 00000-0 00000-0 0 9999
TLE line 2: 2 21227 13.5991 15.1927 0007395 292.2644 57.6538 0.99569554124544
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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