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 a 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
| NORAD ID | 870 |
| COSPAR ID | |
| Orbit | LEO |
| Last TLE update | 7 hours ago |
| Origin | |
| Manufacturer | Cutler-Hammer/AIL |
| Bus | S-48 |
| Motor | Unknown |
| 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) |
Predictive object data (real-time)
| Latitude | 1.02419° |
| Longitude | -123.084° |
| Altitude | 896.317 km |
| Speed | 7.419 km/s |
| Apparent Right ascension | 19h 05m 16s |
| Apparent Declination | -20° 13' 13" |
| Sunlit | Object is in full shadow |
Predictive observer data (real-time)
| Local Sidereal Time | 04:44:14 |
| Azimuth | 292.699° NW |
| Elevation | -54.045° |
| Doppler factor | 1 |
Orbital elements
| Apogee | 991.025 km |
| Perigee | 850.303 km |
| Semi-major axis | 7,298.801 km |
| Eccentricity | 0.0096401 |
| Inclination | 79.8999° |
| RAAN | 309.3289° |
| Arg. of periapsis | 296.4291° |
| True anomaly | 63.68674° |
| Mean anomaly | 62.6997° |
| Eccentric anomaly | 63.19268° |
| Mean motion | 3.48069 °/min |
| BSTAR | 0.00012239 |
| Period | 103.43 mins |
Definitive object data (Epoch: 2024-07-27T08:27:04.108Z)
| Latitude | 0.00001° |
| Longitude | -122.95258° |
| Altitude | 894.475 km |
| Speed | 7.421 km/s |
| True Right ascension | 20h 37m 18s |
| True Declination | 0° 00' 00" |
| Sunlit | Object was in full shadow at TLE epoch |
TLE from 7 hours ago
0 EXPLORER 20
1 870U 64051A 24209.35213088 .00000167 00000-0 12239-3 0 9992
2 870 79.8999 309.3289 0096401 296.4291 62.6997 13.91494947 37959Epoch: 2024-07-27T08:27Z
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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