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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11 intel report (Beta)
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Edit Public Description
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 day ago
TLE from 1 day ago
0 VANGUARD 2
1 11U 59001A 25306.42985580 .00000536 00000-0 26310-3 0 9993
2 11 32.8708 223.1080 1448147 206.8178 144.9777 11.90097211508440Epoch: 2025-11-02T10:18Z
TLE epoch observation values (Epoch: 2025-11-02T10:18:59.541Z)
Latitude
0°
Longitude
26.41422°
Altitude
2,732.363 km
Speed
6.192 km/s
True Right ascension
14h 52m 25s
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
07:43:28
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,902.622 km
Perigee altitude
554.661 km
Semi-major axis
8,106.779 km
Eccentricity
0.14481
Inclination
32.8708°
RAAN
223.108°
Arg. of periapsis
206.8178°
True anomaly
153.23864°
Mean anomaly
144.9777°
Eccentric anomaly
149.22335°
Mean motion
2.97352 °/min
Orbital period
121.07 mins
BSTAR
0.0002631
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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. |
|---|---|---|---|---|---|---|---|
| 16 mins | 2025-11-03 18:35:57.564Z | 163.956° S | 2025-11-03 18:43:57.564Z | 134.495° SE | 15.937° | 2025-11-03 18:51:57.564Z | 106.012° ESE |
| 27 mins | 2025-11-03 20:39:57.564Z | 209.087° SW | 2025-11-03 20:53:57.564Z | 148.926° SSE | 33.027° | 2025-11-03 21:06:57.564Z | 90.307° ESE |
| 28 mins | 2025-11-03 22:48:57.564Z | 241.556° WSW | 2025-11-03 23:04:57.564Z | 165.923° S | 41.137° | 2025-11-03 23:16:57.564Z | 94.237° ESE |
| 24 mins | 2025-11-04 01:00:57.564Z | 263.064° W | 2025-11-04 01:15:57.564Z | 181.365° SSW | 41.41° | 2025-11-04 01:24:57.564Z | 113.034° SE |
| 16 mins | 2025-11-04 03:14:57.564Z | 267.714° W | 2025-11-04 03:24:57.564Z | 206.194° SW | 31.122° | 2025-11-04 03:30:57.564Z | 151.641° SSE |
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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