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 | 16 hours ago |
| Origin | |
| Manufacturer | Cutler-Hammer/AIL |
| 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 |
| Shape & HBR | Double Cone + 6 Rod, 37 m |
| Radar Cross Section | 0.292 m², Medium (>0.1 m² and < 1m²) |
Expand to show TLE details & history
TLE from 16 hours ago
0 EXPLORER 20
1 870U 64051A 24355.95664400 .00000266 00000-0 19693-3 0 9999
2 870 79.8968 149.8527 0096812 271.1854 87.8212 13.91599066 58341Epoch: 2024-12-20T22:57Z
Definitive object data (Epoch: 2024-12-20T22:57:34.041Z)
| Latitude | -0.00004° |
| Longitude | 75.44614° |
| Altitude | 923.857 km |
| Speed | 7.391 km/s |
| True Right ascension | 09h 59m 24s |
| True Declination | 0° 00' 00" |
| Sunlit | Object was in daylight at TLE epoch |
Visualization TLE readout
| Latitude | 27.74407° |
| Longitude | 80.08599° |
| Altitude | 959.78 km |
| Speed | 7.357 km/s |
| Apparent Right ascension | 07h 05m 12s |
| Apparent Declination | -7° 33' 51" |
| Sunlit | Object is in full shadow |
Visualization observer readout
| Local Sidereal Time | 13:39:37 |
| Azimuth | 269.66° W |
| Elevation | -11.432° |
| Doppler factor | 1 |
Orbital elements
| Apogee altitude | 990.957 km |
| Perigee altitude | 849.642 km |
| Semi-major axis | 7,298.437 km |
| Eccentricity | 0.0096812 |
| Inclination | 79.8968° |
| RAAN | 149.8527° |
| Arg. of periapsis | 271.1854° |
| True anomaly | 88.93022° |
| Mean anomaly | 87.8212° |
| Eccentric anomaly | 88.37567° |
| Mean motion | 3.48096 °/min |
| BSTAR | 0.00019693 |
| Orbital period | 103.42 mins |
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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: 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 | 2024-12-21 21:59:28.013Z | 356.254° N | 2024-12-21 22:03:28.013Z | 45.322° ENE | 42.853° | 2024-12-21 22:09:28.013Z | 161.063° S |
| 5 mins | 2024-12-21 23:45:28.013Z | 300.165° NW | 2024-12-21 23:47:28.013Z | 279.102° WNW | 15.525° | 2024-12-21 23:50:28.013Z | 247.001° WSW |
| 11 mins | 2024-12-22 11:18:28.013Z | 190.915° SSW | 2024-12-22 11:23:28.013Z | 256.474° W | 44.955° | 2024-12-22 11:29:28.013Z | 10.412° NNE |
| 4 mins | 2024-12-22 13:07:28.013Z | 282.743° WNW | 2024-12-22 13:09:28.013Z | 303.022° NW | 12.952° | 2024-12-22 13:11:28.013Z | 322.514° NNW |
Authenticating...
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