Key statistics
Satellite OV1-21 R/B at a glance.
Uptime
19853
Days in orbit
Revolutions
≈ 14.2
Per day
Orbit
LEO
Low Earth Orbit
Inclination
87.6
Latest
Satellite identification and parameters
Extended collection of information and parameters for OV1-21 R/B.
Object identification
Identified? True
Debris? False
Object name: OV1-21 R/B
International designator: 1971-067B
Object number (NORAD): 5397
Object ID (CCSDS): 5397
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 101.538 minutes
Inclination: 87.6296 deg
SMA: 7209.645 km
Apoapsis: 891.632 km
Periapsis: 771.388 km
RAAN: 123.1047 deg
Eccentricy: 0.0083391
Argument of periapsis: 59.3318 deg
Mean anomaly: 301.6056 deg
Mean motion: 14.18181881 rev/day
Mean motion (dot): 0.00000214 rev/day2
B* drag term: 0.000092218642 1/REarth
Two-line elements (TLE)
Creation date: Dec. 14, 2025, 3:07 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 13, 2025, 3:52 p.m. UTC
TLE line 0: 0 OV1-21 R/B
TLE line 1: 1 05397U 71067B 25347.66117820 .00000214 00000-0 92219-4 0 9991
TLE line 2: 2 05397 87.6296 123.1047 0083391 59.3318 301.6056 14.18181881808159
Live tracking on map
Real-time ground track for satellite OV1-21 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object OV1-21 R/B.
Associated space launch
High-density satellite designed to obtain atmospheric density data at low altitudes.
OV1-21 R/B was lifted into orbit during the mission ‘Atlas F | LOADS 2’, on board a Atlas F space rocket.
The launch took place on Aug. 7, 1971, 12:11 a.m. from 576A2.
For more information about the launch, click the button.
Atlas F | LOADS 2
Agency: N/A
Status: Launch Successful
Launch date: Aug. 7, 1971, 12:11 a.m. UTC
Rocket: Atlas F
Launch pad: 576A2
Location: Vandenberg SFB, CA, USA
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