VANGUARD 2, 11
Orbit data source: Space-Track
VANGUARD 2, 11 is a payload satellite owned by NASA BSC (US) in LEO that was launched on Tue, 17 Feb 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
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Spacecraft
Bus & Motor
NRL 20", Unknown motor
Mass
10 kg wet, 10 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 1 week ago
TLE from 1 week ago
0 VANGUARD 2
1 00011U 59001A 26153.12093366 .00001548 00000-0 80932-3 0 9997
2 00011 32.8681 142.1836 1445008 331.1271 21.6303 11.90465921533674Epoch: 2026-06-02T02:54Z
TLE epoch observation values (Epoch: 2026-06-02T02:54:08.668Z)
Latitude
0°
Longitude
-151.95097°
Altitude
663.171 km
Speed
8.003 km/s
True Right ascension
09h 28m 44s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
03:18:59
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,898.163 km
Perigee altitude
555.775 km
Semi-major axis
8,105.106 km
Eccentricity
0.1445
Inclination
32.8681°
RAAN
142.1836°
Arg. of periapsis
331.1271°
True anomaly
28.93329°
Mean anomaly
21.6303°
Eccentric anomaly
25.14875°
Mean motion
2.97444 °/min
Orbital period
121.03 mins
BSTAR
0.00080932
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Other satellites on launch #1 in the year 1959 (1959-02-17 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.VANGUARD 2 Visibility forecast
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-06-09 00:15:04.076Z | 170.725° S | 2026-06-09 00:17:04.076Z | 144.758° SSE | 15.067° | 2026-06-09 00:20:04.076Z | 113.474° SE |
| 12 mins | 2026-06-09 02:20:04.076Z | 227.225° WSW | 2026-06-09 02:24:04.076Z | 164.13° S | 35.087° | 2026-06-09 02:32:04.076Z | 97.779° ESE |
| 17 mins | 2026-06-09 04:27:04.076Z | 252.122° W | 2026-06-09 04:32:04.076Z | 192.954° SSW | 38.864° | 2026-06-09 04:44:04.076Z | 113.102° SE |
| 21 mins | 2026-06-09 06:34:04.076Z | 259.59° W | 2026-06-09 06:42:04.076Z | 199.542° SSW | 32.239° | 2026-06-09 06:55:04.076Z | 140.334° SSE |
| 16 mins | 2026-06-09 08:45:04.076Z | 246.507° WSW | 2026-06-09 08:52:04.076Z | 213.474° SW | 18.138° | 2026-06-09 09:01:04.076Z | 179.165° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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