VANGUARD 3, 20
Orbit data source: Space-Track
VANGUARD 3, 20 is a payload satellite owned by GSFC (US) in LEO that was launched on Fri, 18 Sep 1959 UTC via a VANGUARD 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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VANGUARD 3 details
| Identifier | |
| Orbit | LEO |
| Last TLE update | 14 hours ago |
| Origin | |
| Manufacturer | NRL |
| Mission status | Unknown |
| Mission | Civil Science |
| Bus & Motor | NRL 20", Unknown motor |
| Mass | 47 kg wet, 23 kg dry |
| Launch date (UTC) | |
| Launch vehicle | |
| Launch site | |
| Object type | Payload Rocket body Debris |
| Radar Cross Section | 0.66 m², Medium (>0.1 m² and < 1m²) |
Expand to show TLE details & history
TLE from 14 hours ago
0 VANGUARD 3
1 00020U 59007A 24251.58141981 .00005827 00000-0 23338-2 0 9997
2 00020 33.3444 74.7622 1648673 187.3319 170.0003 11.59645277409337Epoch: 2024-09-07T13:57Z
Definitive object data (Epoch: 2024-09-07T13:57:14.671Z)
| Latitude | 0.00001° |
| Longitude | -121.68646° |
| Altitude | 3,209.453 km |
| Speed | 5.902 km/s |
| True Right ascension | 04h 59m 02s |
| True Declination | 0° 00' 00" |
| Sunlit | Object was in daylight at TLE epoch |
Predictive object data (real-time)
| Latitude | -28.25317° |
| Longitude | -178.17852° |
| Altitude | 2,139.79 km |
| Speed | 6.731 km/s |
| Apparent Right ascension | 03h 41m 02s |
| Apparent Declination | -45° 41' 29" |
| Sunlit | Object is in full shadow |
Predictive observer data (real-time)
| Local Sidereal Time | 20:09:58 |
| Azimuth | 120.234° SE |
| Elevation | -41.798° |
| Doppler factor | 1 |
Orbital elements
| Apogee | 3,229.623 km |
| Perigee | 509.991 km |
| Semi-major axis | 8,247.944 km |
| Eccentricity | 0.1648673 |
| Inclination | 33.3444° |
| RAAN | 74.7622° |
| Arg. of periapsis | 187.3319° |
| True anomaly | 172.72371° |
| Mean anomaly | 170.0003° |
| Eccentric anomaly | 171.41104° |
| Mean motion | 2.89751 °/min |
| BSTAR | 0.0023338 |
| Period | 124.24 mins |
No data available
Other satellites on launch #7 in the year 1959 (1959-09-18 UTC)
| VANGUARD 3, 20 |
| VANGUARD 3 DEB, 29005 (Decayed) |
| VANGUARD 3 DEB, 31405 (Decayed) |
VANGUARD 3 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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