EXPLORER 20, 870
Orbit data source: Space-Track
EXPLORER 20, 870 is a payload satellite owned by GSFC (US) in LEO that was launched on Tue, 25 Aug 1964 UTC via an SCOUT X-4 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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EXPLORER 20 details
| Identifier | |
| Orbit | LEO |
| Last TLE update | 12 hours ago |
| Origin | |
| Manufacturer | Cutler-Hammer/AIL |
| Mission status | Unknown |
| Mission | Civil Science |
| Bus & Motor | S-48, Unknown motor |
| Mass | 44 kg wet, 44 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 12 hours ago
0 EXPLORER 20
1 00870U 64051A 24251.55892506 .00000401 00000-0 29900-3 0 9993
2 00870 79.8941 263.4134 0097186 184.9510 175.0696 13.91520189 43355Epoch: 2024-09-07T13:24Z
Definitive object data (Epoch: 2024-09-07T13:24:51.125Z)
| Latitude | 0.00003° |
| Longitude | 75.08501° |
| Altitude | 996.852 km |
| Speed | 7.318 km/s |
| True Right ascension | 17h 33m 39s |
| True Declination | 0° 00' 00" |
| Sunlit | Object was in daylight at TLE epoch |
Predictive object data (real-time)
| Latitude | 8.19357° |
| Longitude | 75.99857° |
| Altitude | 996.169 km |
| Speed | 7.319 km/s |
| Apparent Right ascension | 17h 27m 40s |
| Apparent Declination | -51° 32' 04" |
| Sunlit | Object is in daylight |
Predictive observer data (real-time)
| Local Sidereal Time | 17:42:01 |
| Azimuth | 182.232° SSW |
| Elevation | -1.504° |
| Doppler factor | 1 |
Orbital elements
| Apogee | 991.509 km |
| Perigee | 849.642 km |
| Semi-major axis | 7,298.713 km |
| Eccentricity | 0.0097186 |
| Inclination | 79.8941° |
| RAAN | 263.4134° |
| Arg. of periapsis | 184.951° |
| True anomaly | 175.16417° |
| Mean anomaly | 175.0696° |
| Eccentric anomaly | 175.117° |
| Mean motion | 3.48076 °/min |
| BSTAR | 0.000299 |
| Period | 103.43 mins |
No data available
Other satellites on launch #51 in the year 1964 (1964-08-25 UTC)
| EXPLORER 20, 870 |
| SCOUT X-4 R/B, 871 |
| SCOUT X-4 DEB, 873 (Decayed) |
| SCOUT X-4 DEB, 874 (Decayed) |
| SCOUT X-4 DEB, 875 (Decayed) |
| SCOUT X-4 DEB, 40592 |
EXPLORER 20 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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