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: 12 hours ago
TLE from 12 hours ago
0 OV1-4
1 02121U 66025A 26132.38031590 .00000304 00000-0 28613-4 0 9999
2 02121 144.5022 183.7060 0082522 110.0526 250.9055 13.87321255 46165Epoch: 2026-05-12T09:07Z
TLE epoch observation values (Epoch: 2026-05-12T09:07:39.293Z)
Latitude
0.00001°
Longitude
176.63675°
Altitude
957.244 km
Speed
7.365 km/s
True Right ascension
12h 14m 49s
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
05:01:03
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,001.413 km
Perigee altitude
880.615 km
Semi-major axis
7,319.151 km
Eccentricity
0.00825
Inclination
144.5022°
RAAN
183.706°
Arg. of periapsis
110.0526°
True anomaly
250.01494°
Mean anomaly
250.9055°
Eccentric anomaly
250.45991°
Mean motion
3.46619 °/min
Orbital period
103.86 mins
BSTAR
0.000028613
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-05-12 21:35:00.461Z | 98.671° ESE | 2026-05-12 21:40:00.461Z | 167.898° S | 39.719° | 2026-05-12 21:45:00.461Z | 253.938° W |
| 8 mins | 2026-05-12 23:15:00.461Z | 122.75° SE | 2026-05-12 23:19:00.461Z | 207.141° SW | 36.803° | 2026-05-12 23:23:00.461Z | 262.392° W |
| 7 mins | 2026-05-13 00:54:00.461Z | 157.04° SSE | 2026-05-13 00:57:00.461Z | 202.246° SSW | 25.297° | 2026-05-13 01:01:00.461Z | 256.421° W |
| 4 mins | 2026-05-13 18:33:00.461Z | 131.365° SE | 2026-05-13 18:35:00.461Z | 158.185° S | 16.303° | 2026-05-13 18:37:00.461Z | 182.767° SSW |
| 8 mins | 2026-05-13 20:10:00.461Z | 106.825° ESE | 2026-05-13 20:13:00.461Z | 158.894° S | 31.691° | 2026-05-13 20:18:00.461Z | 230.362° 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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