RELAY 2, 737
Orbit data source: Space-Track
RELAY 2, 737 is a payload satellite owned by GSFC (US) that was launched on Tue, 21 Jan 1964 UTC via a THOR DELTA B 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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737 intel report (Beta)
RELAY 2 details
| Identifier | |
| Orbit | Active |
| Last TLE update | 2 days ago |
| Origin | |
| Manufacturer | RCA/East Windsor |
| Mission | Civil Communications |
| Bus & Motor | RELAY, Unknown motor |
| Mass | 83 kg wet, 83 kg dry |
| Launch date (UTC) | |
| Launch vehicle | |
| Launch site | |
| Object type | Payload Rocket body Debris |
| Shape & HBR | Oct Cyl, 0.81 m |
| Radar Cross Section | 0.652 m², Medium (>0.1 m² and < 1m²) |
Expand to show TLE details & history
TLE from 2 days ago
0 RELAY 2
1 00737U 64003A 25021.85291036 -.00000018 00000-0 00000-0 0 9994
2 00737 46.4408 201.2811 2593331 167.9054 199.8463 7.39541000648263Epoch: 2025-01-21T20:28Z
Definitive object data (Epoch: 2025-01-21T20:28:11.455Z)
| Latitude | 0.00004° |
| Longitude | 132.78022° |
| Altitude | 7,527.091 km |
| Speed | 4.639 km/s |
| True Right ascension | 13h 25m 07s |
| True Declination | 0° 00' 00" |
| Sunlit | Object was in daylight at TLE epoch |
Visualization TLE readout
| Latitude | -28.42804° |
| Longitude | -18.45052° |
| Altitude | 2,550.175 km |
| Speed | 7.316 km/s |
| Apparent Right ascension | 04h 11m 35s |
| Apparent Declination | -34° 09' 39" |
| Sunlit | Object is in daylight |
Visualization observer readout
| Local Sidereal Time | 17:35:10 |
| Azimuth | 77.511° E |
| Elevation | -72.407° |
| Doppler factor | 1 |
Orbital elements
| Apogee altitude | 7,637.224 km |
| Perigee altitude | 1,864.888 km |
| Semi-major axis | 11,129.193 km |
| Eccentricity | 0.2593331 |
| Inclination | 46.4408° |
| RAAN | 201.2811° |
| Arg. of periapsis | 167.9054° |
| True anomaly | 192.14909° |
| Mean anomaly | 199.8463° |
| Eccentric anomaly | 195.80046° |
| Mean motion | 1.84862 °/min |
| BSTAR | Unknown |
| Orbital period | 194.74 mins |
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Other satellites on launch #3 in the year 1964 (1964-01-21 UTC)
| RELAY 2, 737 |
| DELTA 1 R/B, 738 |
RELAY 2 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. |
|---|---|---|---|---|---|---|---|
| 40 mins | 2025-01-23 18:29:37.320Z | 280.573° WNW | 2025-01-23 18:56:37.320Z | 359.511° N | 43.7° | 2025-01-23 19:09:37.320Z | 93.581° ESE |
| 23 mins | 2025-01-23 22:10:37.320Z | 296.619° NW | 2025-01-23 22:23:37.320Z | 236.054° WSW | 36.442° | 2025-01-23 22:33:37.320Z | 158.035° S |
| 51 mins | 2025-01-24 09:55:37.320Z | 150.583° SSE | 2025-01-24 10:24:37.320Z | 112.838° SE | 20.586° | 2025-01-24 10:46:37.320Z | 74.555° E |
| 69 mins | 2025-01-24 13:11:37.320Z | 212.294° SW | 2025-01-24 13:57:37.320Z | 138.772° SSE | 43.319° | 2025-01-24 14:20:37.320Z | 61.93° ENE |
Authenticating...
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