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: 9 hours ago
TLE from 9 hours ago
0 VANGUARD 2
1 11U 59001A 25307.77202964 .00000506 00000-0 24620-3 0 9999
2 11 32.8715 218.0308 1448249 214.4512 135.3281 11.90098654508608Epoch: 2025-11-03T18:31Z
TLE epoch observation values (Epoch: 2025-11-03T18:31:43.360Z)
Latitude
0.00001°
Longitude
-103.16846°
Altitude
2,630.938 km
Speed
6.271 km/s
True Right ascension
14h 32m 07s
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
23:48:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,902.697 km
Perigee altitude
554.573 km
Semi-major axis
8,106.772 km
Eccentricity
0.14482
Inclination
32.8715°
RAAN
218.0308°
Arg. of periapsis
214.4512°
True anomaly
145.60564°
Mean anomaly
135.3281°
Eccentric anomaly
140.59551°
Mean motion
2.97352 °/min
Orbital period
121.07 mins
BSTAR
0.0002462
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Other satellites on launch #1 in the year 1959 (1959-02-17 UTC)
Did you know?
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. |
|---|---|---|---|---|---|---|---|
| 21 mins | 2025-11-04 18:44:52.573Z | 178.228° S | 2025-11-04 18:55:52.573Z | 135.684° SSE | 20.415° | 2025-11-04 19:05:52.573Z | 98.843° ESE |
| 29 mins | 2025-11-04 20:50:52.573Z | 217.873° SW | 2025-11-04 21:05:52.573Z | 151.768° SSE | 35.938° | 2025-11-04 21:19:52.573Z | 88.413° E |
| 28 mins | 2025-11-04 23:00:52.573Z | 247.576° W | 2025-11-04 23:16:52.573Z | 172.418° S | 41.969° | 2025-11-04 23:28:52.573Z | 97.106° ESE |
| 23 mins | 2025-11-05 01:13:52.573Z | 265.754° W | 2025-11-05 01:27:52.573Z | 188.789° SSW | 40.674° | 2025-11-05 01:36:52.573Z | 119.375° SE |
| 16 mins | 2025-11-05 03:26:52.573Z | 267.79° W | 2025-11-05 03:35:52.573Z | 219.366° SW | 27.513° | 2025-11-05 03:42:52.573Z | 159.882° 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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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