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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Edit Public Description
Identifier
Orbit
Last TLE update
1 day ago
Origin
Manufacturer
GD/Convair
Mission
Defense Science
Bus & Motor
OV1, Unknown motor
Mass
87 kg wet, 87 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Domed Cyl, 1.4 m
Radar Cross Section
0.946 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & history
TLE from 1 day ago
0 OV1-4
1 02121U 66025A 25182.10817723 .00000273 00000-0 23091-5 0 9994
2 02121 144.5066 38.9456 0083032 19.1178 341.2603 13.87264374 2367Epoch: 2025-07-01T02:35Z
TLE epoch observation values (Epoch: 2025-07-01T02:35:46.512Z)
Latitude
-0.00005°
Longitude
80.59351°
Altitude
879.791 km
Speed
7.443 km/s
True Right ascension
02h 35m 46s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
-35.40066°
Longitude
168.77847°
Altitude
969.115 km
Speed
7.357 km/s
Apparent Right ascension
07h 09m 32s
Apparent Declination
-39° 25' 37"
Sunlit
Visualization observer readout
Local Sidereal Time
17:31:51
Azimuth
263.603° W
Elevation
-71.256°
Doppler factor
1
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Other satellites on launch #25 in the year 1966 (1966-03-30 UTC)
OV1-4 Visibility forecast
Observer location: undefined°, undefined°
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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-07-02 06:43:13.778Z | 97.876° ESE | 2025-07-02 06:48:13.778Z | 166.562° S | 29.211° | 2025-07-02 06:52:13.778Z | 219.782° SW |
| 9 mins | 2025-07-02 08:22:13.778Z | 100.168° ESE | 2025-07-02 08:26:13.778Z | 168.677° S | 39.05° | 2025-07-02 08:31:13.778Z | 248.419° W |
| 8 mins | 2025-07-02 10:01:13.778Z | 116.35° SE | 2025-07-02 10:04:13.778Z | 168.865° S | 38.797° | 2025-07-02 10:09:13.778Z | 261.357° W |
| 7 mins | 2025-07-02 11:40:13.778Z | 149.207° SSE | 2025-07-02 11:43:13.778Z | 202.882° SW | 29.475° | 2025-07-02 11:47:13.778Z | 259.571° W |
| 4 mins | 2025-07-02 13:20:13.778Z | 191.821° SSW | 2025-07-02 13:22:13.778Z | 216.266° SW | 13.626° | 2025-07-02 13:24:13.778Z | 238.959° WSW |
| 4 mins | 2025-07-03 05:19:13.778Z | 132.03° SE | 2025-07-03 05:21:13.778Z | 154.555° SSE | 13.079° | 2025-07-03 05:23:13.778Z | 175.613° S |
Event ID | Pc | Md | Secondary | Secondary name | Country | Click to unsort rows by TCA header |
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