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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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: 11 hours ago
TLE from 11 hours ago
0 VANGUARD 2
1 00011U 59001A 26017.20057665 .00000447 00000-0 21611-3 0 9993
2 00011 32.8787 296.4774 1447829 277.7493 66.1603 11.90181408517471Epoch: 2026-01-17T04:48Z
TLE epoch observation values (Epoch: 2026-01-17T04:48:49.822Z)
Latitude
-0.00005°
Longitude
107.64082°
Altitude
1,403.422 km
Speed
7.3 km/s
True Right ascension
19h 45m 54s
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
16:36:55
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,901.926 km
Perigee altitude
554.591 km
Semi-major axis
8,106.396 km
Eccentricity
0.14478
Inclination
32.8787°
RAAN
296.4774°
Arg. of periapsis
277.7493°
True anomaly
82.31079°
Mean anomaly
66.1603°
Eccentric anomaly
74.13996°
Mean motion
2.97373 °/min
Orbital period
121.06 mins
BSTAR
0.00021611
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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. |
|---|---|---|---|---|---|---|---|
| 23 mins | 2026-01-17 21:05:04.173Z | 201.815° SSW | 2026-01-17 21:14:04.173Z | 143.842° SSE | 31.671° | 2026-01-17 21:28:04.173Z | 86.686° E |
| 29 mins | 2026-01-17 23:12:04.173Z | 240.183° WSW | 2026-01-17 23:24:04.173Z | 165.012° S | 41.673° | 2026-01-17 23:41:04.173Z | 92.065° ESE |
| 31 mins | 2026-01-18 01:21:04.173Z | 263.285° W | 2026-01-18 01:36:04.173Z | 183.805° SSW | 42.491° | 2026-01-18 01:52:04.173Z | 111.052° ESE |
| 28 mins | 2026-01-18 03:32:04.173Z | 272.186° WNW | 2026-01-18 03:47:04.173Z | 208.855° SW | 36.315° | 2026-01-18 04:00:04.173Z | 142.52° SSE |
| 17 mins | 2026-01-18 05:47:04.173Z | 261.89° W | 2026-01-18 05:56:04.173Z | 227.398° WSW | 19.036° | 2026-01-18 06:04:04.173Z | 189.831° SSW |
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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