Key statistics
Satellite SPACENET 4 (ASC 2) at a glance.
Uptime
12505
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: 1446.189 minutes
Inclination: 13.4604 deg
SMA: 42362.038 km
Apoapsis: 36003.749 km
Periapsis: 35964.056 km
RAAN: 16.343 deg
Eccentricy: 0.0004685
Argument of periapsis: 310.4394 deg
Mean anomaly: 242.0967 deg
Mean motion: 0.99572061 rev/day
Mean motion (dot): -0.00000117 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: July 8, 2025, 2:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 7, 2025, 6:40 p.m. UTC
TLE line 0: 0 SPACENET 4 (ASC 2)
TLE line 1: 1 21227U 91028A 25188.77813394 -.00000117 00000-0 00000-0 0 9990
TLE line 2: 2 21227 13.4604 16.3430 0004685 310.4394 242.0967 0.99572061122945
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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