OV1-4, 2121
Orbit data source: Space-Track
OV1-4, 2121 is a payload satellite owned by USAF OAR (US) in LEO that was launched on Wed, 30 Mar 1966 UTC via an ATLAS D launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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2121 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
GD/Convair
Mission
Spacecraft
Bus & Motor
OV1, Unknown motor
Mass
87 kg wet, 87 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 7 hours ago
TLE from 7 hours ago
0 OV1-4
1 02121U 66025A 26070.91046137 .00000341 00000-0 57684-4 0 9993
2 02121 144.5040 234.7036 0082943 30.8044 329.7481 13.87312838 37622Epoch: 2026-03-11T21:51Z
TLE epoch observation values (Epoch: 2026-03-11T21:51:03.862Z)
Latitude
0°
Longitude
97.36958°
Altitude
884.806 km
Speed
7.438 km/s
True Right ascension
15h 38m 48s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
09:28:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,001.752 km
Perigee altitude
880.337 km
Semi-major axis
7,319.181 km
Eccentricity
0.00829
Inclination
144.504°
RAAN
234.7036°
Arg. of periapsis
30.8044°
True anomaly
329.26494°
Mean anomaly
329.7481°
Eccentric anomaly
329.50695°
Mean motion
3.46617 °/min
Orbital period
103.86 mins
BSTAR
0.000057684
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Other satellites on launch #25 in the year 1966 (1966-03-30 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.OV1-4 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-03-12 05:09:19.934Z | 111.827° ESE | 2026-03-12 05:12:19.934Z | 195.566° SSW | 39.799° | 2026-03-12 05:17:19.934Z | 256.81° W |
| 9 mins | 2026-03-12 06:46:19.934Z | 122.627° SE | 2026-03-12 06:50:19.934Z | 192.779° SSW | 36.643° | 2026-03-12 06:55:19.934Z | 264.796° W |
| 6 mins | 2026-03-12 08:26:19.934Z | 165.346° S | 2026-03-12 08:28:19.934Z | 195.058° SSW | 23.105° | 2026-03-12 08:32:19.934Z | 252.23° W |
| 6 mins | 2026-03-13 02:04:19.934Z | 124.541° SE | 2026-03-13 02:06:19.934Z | 151.071° SSE | 19.109° | 2026-03-13 02:10:19.934Z | 197.699° SSW |
| 8 mins | 2026-03-13 03:41:19.934Z | 102.701° ESE | 2026-03-13 03:45:19.934Z | 173.95° S | 33.337° | 2026-03-13 03:49:19.934Z | 230.124° WSW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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