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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OPS 3674 (VELA 4) details
| NORAD ID | 837 |
| COSPAR ID | |
| Orbit | HEO |
| Last TLE update | 6 days ago |
| Origin | |
| Manufacturer | TRW |
| Bus | Vela |
| Motor | BE-3 |
| Mass | ~217 kg wet, 125 kg dry |
| Launch date (UTC) | |
| Launch vehicle | |
| Launch site | |
| Object type | Payload Rocket body Debris |
| Radar Cross Section | Medium (>0.1 m² and <1 m²) |
Predictive object data (real-time)
| Latitude | 37.06217° |
| Longitude | -156.54007° |
| Altitude | 130,197.329 km |
| Speed | 1.481 km/s |
| Apparent Right ascension | 12h 04m 19s |
| Apparent Declination | 35° 08' 57" |
| Sunlit | Object is in daylight |
Predictive observer data (real-time)
| Local Sidereal Time | 04:18:07 |
| Azimuth | 47.252° ENE |
| Elevation | 5.112° |
| Doppler factor | 1 |
Orbital elements
| Apogee | 142,852.929 km |
| Perigee | 63,178.532 km |
| Semi-major axis | 109,393.867 km |
| Eccentricity | 0.364163 |
| Inclination | 48.2815° |
| RAAN | 136.8608° |
| Arg. of periapsis | 266.7931° |
| True anomaly | 0.59364° |
| Mean anomaly | 0.2577° |
| Eccentric anomaly | 0.40529° |
| Mean motion | 0.05999 °/min |
| BSTAR | Unknown |
| Period | 6001.35 mins |
Definitive object data (Epoch: 2024-07-22T02:19:56.036Z)
| Latitude | -48.42092° |
| Longitude | 68.71416° |
| Altitude | 63,637.554 km |
| Speed | 2.783 km/s |
| True Right ascension | 02h 56m 07s |
| True Declination | -48° 24' 13" |
| Sunlit | Object was in daylight at TLE epoch |
TLE from 6 days ago
0 OPS 3674 (VELA 4)
1 837U 64040B 24204.09717635 .00000272 00000-0 00000+0 0 9992
2 837 48.2815 136.8608 3641630 266.7931 0.2577 0.23994637 52659Epoch: 2024-07-22T02:19Z
No data available
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: 39.9160978°, -105.1181434
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. |
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