Key statistics
Satellite DELTA 1 R/B at a glance.
Uptime
13071
Days in orbit
Revolutions
≈ 14.5
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
97.1
Latest
Satellite identification and parameters
Extended collection of information and parameters for DELTA 1 R/B.
Object identification
Identified? True
Debris? False
Object name: DELTA 1 R/B
International designator: 1989-089B
Object number (NORAD): 20323
Object ID (CCSDS): 20323
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 99.28 minutes
Inclination: 97.0922 deg
SMA: 7102.327 km
Apoapsis: 773.602 km
Periapsis: 674.781 km
RAAN: 115.2774 deg
Eccentricy: 0.00695697
Argument of periapsis: 7.533 deg
Mean anomaly: 352.6896 deg
Mean motion: 14.50446781 rev/day
Mean motion (dot): 0.00000511 rev/day2
B* drag term: 0.00013551499 1/REarth
Two-line elements (TLE)
Creation date: Aug. 31, 2025, 2:26 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Aug. 30, 2025, 2:42 p.m. UTC
TLE line 0: 0 DELTA 1 R/B
TLE line 1: 1 20323U 89089B 25242.61318193 .00000511 00000-0 13551-3 0 9996
TLE line 2: 2 20323 97.0922 115.2774 0069570 7.5330 352.6896 14.50446781868037
Live tracking on map
Real-time ground track for satellite DELTA 1 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object DELTA 1 R/B.
Associated space launch
Cosmology research satellite
DELTA 1 R/B was lifted into orbit during the mission ‘Delta 5920-8 | COBE’, on board a Delta 5920-8 space rocket.
The launch took place on Nov. 18, 1989, 2:34 p.m. from Space Launch Complex 2W.
For more information about the launch, click the button.
Delta 5920-8 | COBE
Agency: N/A
Status: Launch Successful
Launch date: Nov. 18, 1989, 2:34 p.m. UTC
Rocket: Delta 5920-8
Launch pad: Space Launch Complex 2W
Location: Vandenberg SFB, CA, USA
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