Key statistics
Satellite DELTA 2 R/B at a glance.
Uptime
12566
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: 114.713 minutes
Inclination: 23.9934 deg
SMA: 7820.505 km
Apoapsis: 2329.444 km
Periapsis: 555.295 km
RAAN: 359.9941 deg
Eccentricy: 0.11342928
Argument of periapsis: 144.503 deg
Mean anomaly: 223.6485 deg
Mean motion: 12.55308891 rev/day
Mean motion (dot): 0.00001165 rev/day2
B* drag term: 0.00045573581 1/REarth
Two-line elements (TLE)
Creation date: Sept. 7, 2025, 3:09 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 6, 2025, 5:09 p.m. UTC
TLE line 0: 0 DELTA 2 R/B
TLE line 1: 1 21228U 91028B 25249.71487430 .00001165 00000-0 45574-3 0 9992
TLE line 2: 2 21228 23.9934 359.9941 1134293 144.5030 223.6485 12.55308891574791
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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