Key statistics
Satellite DELTA 2 R/B at a glance.
Uptime
12611
Days in orbit
Revolutions
≈ 12.6
Per day
Orbit
MEO
Medium Earth Orbit
Inclination
24.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for DELTA 2 R/B.
Object identification
Identified? True
Debris? False
Object name: DELTA 2 R/B
International designator: 1991-028B
Object number (NORAD): 21228
Object ID (CCSDS): 21228
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 114.703 minutes
Inclination: 23.9895 deg
SMA: 7820.046 km
Apoapsis: 2328.859 km
Periapsis: 554.963 km
RAAN: 154.1972 deg
Eccentricy: 0.1134198
Argument of periapsis: 141.8524 deg
Mean anomaly: 226.7923 deg
Mean motion: 12.55419295 rev/day
Mean motion (dot): 0.0000133 rev/day2
B* drag term: 0.00052955 1/REarth
Two-line elements (TLE)
Creation date: Oct. 22, 2025, 12:06 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 21, 2025, 1:31 p.m. UTC
TLE line 0: 0 DELTA 2 R/B
TLE line 1: 1 21228U 91028B 25294.56331216 .00001330 00000-0 52955-3 0 9990
TLE line 2: 2 21228 23.9895 154.1972 1134198 141.8524 226.7923 12.55419295580438
Live tracking on map
Real-time ground track for satellite DELTA 2 R/B.
Associated 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.
DELTA 2 R/B 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
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