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
Civil Imaging
Bus & Motor
NRL 20", Unknown motor
Mass
10 kg wet, 10 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Sphere, 0.3 m
Radar Cross Section
0.204 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 VANGUARD 2
1 00011U 59001A 25260.44195344 .00000444 00000-0 21868-3 0 9996
2 00011 32.8772 37.0632 1448548 305.2195 42.1044 11.90024541502967Epoch: 2025-09-17T10:36Z
TLE epoch observation values (Epoch: 2025-09-17T10:36:24.777Z)
Latitude
-0.00001°
Longitude
-118.65791°
Altitude
943.998 km
Speed
7.728 km/s
True Right ascension
02h 28m 15s
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
16:44:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,903.324 km
Perigee altitude
554.617 km
Semi-major axis
8,107.108 km
Eccentricity
0.14485
Inclination
32.8772°
RAAN
37.0632°
Arg. of periapsis
305.2195°
True anomaly
54.84104°
Mean anomaly
42.1044°
Eccentric anomaly
48.3013°
Mean motion
2.97334 °/min
Orbital period
121.08 mins
BSTAR
0.00021868
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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. |
|---|---|---|---|---|---|---|---|
| 14 mins | 2025-09-19 11:06:43.824Z | 185.735° SSW | 2025-09-19 11:12:43.824Z | 136.051° SSE | 22.865° | 2025-09-19 11:20:43.824Z | 93.728° ESE |
| 22 mins | 2025-09-19 13:12:43.824Z | 230.528° WSW | 2025-09-19 13:20:43.824Z | 157.075° SSE | 39.233° | 2025-09-19 13:34:43.824Z | 90.884° ESE |
| 28 mins | 2025-09-19 15:19:43.824Z | 258.911° W | 2025-09-19 15:30:43.824Z | 185.527° SSW | 42.293° | 2025-09-19 15:47:43.824Z | 106.678° ESE |
| 29 mins | 2025-09-19 17:29:43.824Z | 268.027° W | 2025-09-19 17:42:43.824Z | 197.356° SSW | 38.036° | 2025-09-19 17:58:43.824Z | 133.121° SE |
| 23 mins | 2025-09-19 19:41:43.824Z | 262.817° W | 2025-09-19 19:52:43.824Z | 219.072° SW | 24.537° | 2025-09-19 20:04:43.824Z | 171.47° 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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