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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
20, 1959-007A
Orbit
LEO
Last TLE update6 hours ago
Origin
Flag of USGSFC (US)
ManufacturerNRL
MissionCivil Science
Bus & MotorNRL 20", Unknown motor
Mass47 kg wet, 23 kg dry
Launch date (UTC)
1959-09-18 (65 years ago)
Launch vehicle
VANGUARD
Launch site
Air Force Eastern Test Range (AFETR)
Object type
Payload
Rocket body
Debris
Shape & HBRSphere + Cyl, 2.5 m
Radar Cross Section1.104 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 6 hours ago
0 VANGUARD 3
1    20U 59007A   25047.76800452  .00001148  00000-0  45702-3 0  9998
2    20  33.3448 212.6156 1644659 334.1579  18.5097 11.60427750428208
Epoch: 2025-02-16T18:25Z
Definitive object data (Epoch: 2025-02-16T18:25:55.59Z)
Latitude0.00001°
Longitude149.13767°
Altitude605.958 km
Speed8.112 km/s
True Right ascension14h 10m 27s
True Declination0° 00' 00"
Sunlit
Object was in full shadow at TLE epoch
Visualization TLE readout
Latitude21.37762°
Longitude-175.53067°
Altitude1,131.986 km
Speed7.605 km/s
Apparent Right ascension16h 09m 25s
Apparent Declination-6° 30' 31"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time03:37:26
Azimuth345.753° N
Elevation-55.829°
Doppler factor1
Orbital elements
Apogee altitude3,221.997 km
Perigee altitude510.205 km
Semi-major axis8,244.238 km
Eccentricity0.1644659
Inclination33.3448°
RAAN212.6156°
Arg. of periapsis334.1579°
True anomaly25.90279°
Mean anomaly18.5097°
Eccentric anomaly22.04683°
Mean motion2.89946 °/min
BSTAR0.00045702
Orbital period124.16 mins
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Other satellites on launch #7 in the year 1959 (1959-09-18 UTC)

VANGUARD 3 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.
9 mins2025-02-17 13:11:52.642Z171.877° S2025-02-17 13:15:52.642Z132.749° SE18.15°2025-02-17 13:20:52.642Z100.003° ESE
19 mins2025-02-17 15:19:52.642Z228.043° WSW2025-02-17 15:25:52.642Z161.379° S38.28°2025-02-17 15:38:52.642Z90.359° ESE
26 mins2025-02-17 17:29:52.642Z258.259° W2025-02-17 17:38:52.642Z183.841° SSW42.27°2025-02-17 17:55:52.642Z106.397° ESE
29 mins2025-02-17 19:41:52.642Z267.508° W2025-02-17 19:53:52.642Z196.958° SSW38.048°2025-02-17 20:10:52.642Z133.888° SE
26 mins2025-02-17 21:55:52.642Z263.6° W2025-02-17 22:07:52.642Z217.298° SW25°2025-02-17 22:21:52.642Z169.934° S
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