GREB, 731
Orbit data source: Space-Track
GREB, 731 is an American payload satellite in LEO that was launched on Sat, 11 Jan 1964 UTC via a THOR SLV-2A AGENA D launch vehicle from the Air Force Western Test Range (AFWTR). 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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GREB details
| Identifier | |
| Orbit | LEO |
| Last TLE update | 18 hours ago |
| Origin | |
| Manufacturer | NRL |
| Mission status | Unknown |
| Mission | Defense Sigint |
| Bus & Motor | NRL 20", Unknown motor |
| Mass | 29 kg wet, 29 kg dry |
| Launch date (UTC) | |
| Launch vehicle | |
| Launch site | |
| Object type | Payload Rocket body Debris |
| Radar Cross Section | 0.53 m², Medium (>0.1 m² and < 1m²) |
Expand to show TLE details & history
TLE from 18 hours ago
0 GREB
1 00731U 64001E 24251.30531320 .00000309 00000-0 26391-3 0 9999
2 00731 69.9045 218.9077 0012049 151.0740 209.1035 13.96118473 87147Epoch: 2024-09-07T07:19Z
Definitive object data (Epoch: 2024-09-07T07:19:39.06Z)
| Latitude | -0.00005° |
| Longitude | 122.12953° |
| Altitude | 917.247 km |
| Speed | 7.39 km/s |
| True Right ascension | 14h 35m 37s |
| True Declination | 0° 00' 00" |
| Sunlit | Object was in daylight at TLE epoch |
Predictive object data (real-time)
| Latitude | -44.73462° |
| Longitude | -38.36982° |
| Altitude | 922.081 km |
| Speed | 7.391 km/s |
| Apparent Right ascension | 04h 48m 27s |
| Apparent Declination | -43° 11' 11" |
| Sunlit | Object is in daylight |
Predictive observer data (real-time)
| Local Sidereal Time | 17:46:40 |
| Azimuth | 111.471° ESE |
| Elevation | -78.648° |
| Doppler factor | 1 |
Orbital elements
| Apogee | 914.096 km |
| Perigee | 896.544 km |
| Semi-major axis | 7,283.457 km |
| Eccentricity | 0.0012049 |
| Inclination | 69.9045° |
| RAAN | 218.9077° |
| Arg. of periapsis | 151.074° |
| True anomaly | 209.03643° |
| Mean anomaly | 209.1035° |
| Eccentric anomaly | 209.06996° |
| Mean motion | 3.4917 °/min |
| BSTAR | 0.00026391 |
| Period | 103.1 mins |
No data available
Other satellites on launch #1 in the year 1964 (1964-01-11 UTC)
| THOR AGENA D R/B, 727 |
| GGSE 1 (GGRS), 728 |
| SECOR 1B, 729 |
| SOLRAD 7A, 730 |
| GREB, 731 |
GREB 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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