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). 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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731 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Last TLE update
12 hours ago
Origin
Manufacturer
NRL
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
Shape & HBR
Sphere, 0.5 m
Radar Cross Section
0.196 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & history
TLE from 12 hours ago
0 GREB
1 00731U 64001E 25129.24722440 .00000031 00000-0 61474-4 0 9996
2 00731 69.9071 54.8991 0014564 197.8864 162.1730 13.96229328121193Epoch: 2025-05-09T05:56Z
Definitive object data (Epoch: 2025-05-09T05:56:00.188Z)
Latitude
-0.00005°
Longitude
98.59219°
Altitude
919.291 km
Speed
7.387 km/s
True Right ascension
03h 39m 35s
True Declination
0° 00' 00"
Sunlit
Visualization TLE readout
Latitude
69.5334°
Longitude
-159.68881°
Altitude
920.619 km
Speed
7.397 km/s
Apparent Right ascension
13h 14m 17s
Apparent Declination
22° 54' 50"
Sunlit
Visualization observer readout
Local Sidereal Time
02:36:02
Azimuth
20.671° NNE
Elevation
-24.341°
Doppler factor
1
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Other satellites on launch #1 in the year 1964 (1964-01-11 UTC)
GREB 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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-05-09 19:48:13.999Z | 171.912° S | 2025-05-09 19:53:13.999Z | 96.793° ESE | 33.752° | 2025-05-09 19:58:13.999Z | 39.001° NE |
| 8 mins | 2025-05-09 21:35:13.999Z | 257.062° W | 2025-05-09 21:38:13.999Z | 298.814° NW | 26.952° | 2025-05-09 21:43:13.999Z | 2.85° NNE |
| 7 mins | 2025-05-10 04:51:13.999Z | 10.95° NNE | 2025-05-10 04:54:13.999Z | 51.959° ENE | 24.137° | 2025-05-10 04:58:13.999Z | 102.96° ESE |
| 9 mins | 2025-05-10 06:36:13.999Z | 318.008° NNW | 2025-05-10 06:40:13.999Z | 249.73° W | 37.165° | 2025-05-10 06:45:13.999Z | 180.423° SSW |
Event ID | Pc | Md | Secondary | Secondary name | Country | Click to unsort rows by TCA header |
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