Key statistics
Satellite DELTA 1 R/B at a glance.
Uptime
18532
Days in orbit
Revolutions
≈ 14.1
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
97.8
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: 1975-004B
Object number (NORAD): 7616
Object ID (CCSDS): 7616
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 102.417 minutes
Inclination: 97.7714 deg
SMA: 7251.162 km
Apoapsis: 1008.39 km
Periapsis: 737.665 km
RAAN: 15.0752 deg
Eccentricy: 0.01866771
Argument of periapsis: 130.6374 deg
Mean anomaly: 231.12 deg
Mean motion: 14.06019463 rev/day
Mean motion (dot): 0.00000579 rev/day2
B* drag term: 0.00031890126 1/REarth
Two-line elements (TLE)
Creation date: Oct. 18, 2025, 2:17 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 17, 2025, 10:44 p.m. UTC
TLE line 0: 0 DELTA 1 R/B
TLE line 1: 1 07616U 75004B 25290.94745731 .00000579 00000-0 31890-3 0 9999
TLE line 2: 2 07616 97.7714 15.0752 0186677 130.6374 231.1200 14.06019463586356
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
Earth observation satellite
DELTA 1 R/B was lifted into orbit during the mission ‘Delta 2910 | Landsat 2’, on board a Delta 2910 space rocket.
The launch took place on Jan. 22, 1975, 5:55 p.m. from Space Launch Complex 2W.
For more information about the launch, click the button.
Delta 2910 | Landsat 2
Agency: N/A
Status: Launch Successful
Launch date: Jan. 22, 1975, 5:55 p.m. UTC
Rocket: Delta 2910
Launch pad: Space Launch Complex 2W
Location: Vandenberg SFB, CA, USA
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