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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). Payload-class satellites include a variety of spacecraft 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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Identifier
20, 1959-007A
Orbit
LEO
Country
Flag of USUS
Related business
Manufacturer
NRL
Mission
Spacecraft
Bus & Motor
NRL 20", Unknown motor
Mass
47 kg wet, 23 kg dry
Launch date (UTC)
1959-09-18 (67 years ago)
Launch vehicle
VANGUARD
Launch site
Air Force Eastern Test Range (AFETR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 14 hours ago

TLE from 14 hours ago
0 VANGUARD 3
1 00020U 59007A   26104.06033964  .00000355  00000-0  15032-3 0  9994
2 00020  33.3387 137.8219 1637323  69.7937 307.0809 11.61922188477158
Epoch: 2026-04-14T01:26Z
TLE epoch observation values (Epoch: 2026-04-14T01:26:53.344Z)
Latitude
-0.00005°
Longitude
-86.14245°
Altitude
1,204.101 km
Speed
7.534 km/s
True Right ascension
09h 11m 17s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
N/A
Visualization observer readout
Local Sidereal Time
21:44:24
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,207.726 km
Perigee altitude
510.344 km
Semi-major axis
8,237.172 km
Eccentricity
0.16373
Inclination
33.3387°
RAAN
137.8219°
Arg. of periapsis
69.7937°
True anomaly
290.26725°
Mean anomaly
307.0809°
Eccentric anomaly
298.86527°
Mean motion
2.90319 °/min
Orbital period
124 mins
BSTAR
0.00015032
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Other satellites on launch #7 in the year 1959 (1959-09-18 UTC)

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