OPS 3674 (VELA 4), 837
Orbit data source: Space-Track
OPS 3674 (VELA 4), 837 is a payload satellite owned by USAF SSD (US) in HEO that was launched on Fri, 17 Jul 1964 UTC via an ATLAS AGENA D launch vehicle from the Air Force Eastern Test Range (AFETR). Payloads include a variety of satellites, spacecraft, and rockets 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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837 intel report (Beta)
OPS 3674 (VELA 4) details
| Identifier | |
| Orbit | HEO |
| Last TLE update | in 3 days |
| Origin | |
| Manufacturer | TRW |
| Mission | Defense Early Warn |
| Bus & Motor | VELA, BE-3 |
| Mass | ~217 kg wet, 125 kg dry |
| Launch date (UTC) | |
| Launch vehicle | |
| Launch site | |
| Object type | Payload Rocket body Debris |
| Shape & HBR | Poly, 1.4 m |
| Radar Cross Section | 2.240 m², Medium (>0.1 m² and < 1m²) |
Expand to show TLE details & history
TLE from in 3 days
0 OPS 3674 (VELA 4)
1 837U 64040B 25017.17896740 .00000192 00000-0 00000+0 0 9990
2 837 48.6272 133.6245 4130363 261.9275 0.2712 0.24000403 53086Epoch: 2025-01-17T04:17Z
Definitive object data (Epoch: 2025-01-17T04:17:42.783Z)
| Latitude | -48.44393° |
| Longitude | -146.73013° |
| Altitude | 58,306.671 km |
| Speed | 2.947 km/s |
| True Right ascension | 02h 18m 10s |
| True Declination | -48° 25' 30" |
| Sunlit | Object was in daylight at TLE epoch |
Visualization TLE readout
| Latitude | 36.4854° |
| Longitude | -7.26203° |
| Altitude | 134,837.617 km |
| Speed | 1.415 km/s |
| Apparent Right ascension | 11h 40m 40s |
| Apparent Declination | 36° 11' 14" |
| Sunlit | Object is in daylight |
Visualization observer readout
| Local Sidereal Time | 09:49:17 |
| Azimuth | 90.773° ESE |
| Elevation | 67.853° |
| Doppler factor | 1 |
Orbital elements
| Apogee altitude | 148,174.611 km |
| Perigee altitude | 57,821.808 km |
| Semi-major axis | 109,376.347 km |
| Eccentricity | 0.4130363 |
| Inclination | 48.6272° |
| RAAN | 133.6245° |
| Arg. of periapsis | 261.9275° |
| True anomaly | 0.71687° |
| Mean anomaly | 0.2712° |
| Eccentric anomaly | 0.46204° |
| Mean motion | 0.06 °/min |
| BSTAR | Unknown |
| Orbital period | 5999.91 mins |
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Other satellites on launch #40 in the year 1964 (1964-07-17 UTC)
| OPS 3662 (VELA 3), 836 |
| OPS 3674 (VELA 4), 837 |
| ERS 13, 838 (Decayed) |
OPS 3674 (VELA 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. |
|---|---|---|---|---|---|---|---|
| 668 mins | 2025-01-14 09:13:24.271Z | 90.784° ESE | 2025-01-14 11:18:24.271Z | 195.289° SSW | 44.993° | 2025-01-14 20:21:24.271Z | 320.447° NNW |
| 194 mins | 2025-01-15 05:59:24.271Z | 35.201° NE | 2025-01-15 09:13:24.271Z | 52.014° ENE | 27.932° | 2025-01-15 09:13:24.271Z | 52.014° ENE |
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