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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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<iframe src="https://www.satcat.com/sats-embedded/11?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/11?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

11, 1959-001A

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

NRL

Mission

Civil Imaging

Bus & Motor

NRL 20", Unknown motor

Mass

10 kg wet, 10 kg dry

Launch date (UTC)

1959-02-17 (67 years ago)

Launch vehicle

VANGUARD

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Sphere, 0.3 m

Radar Cross Section

0.204 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 7 hours ago

TLE from 7 hours ago

0 VANGUARD 2
1 00011U 59001A   25243.57469900  .00000908  00000-0  45840-3 0  9994
2 00011  32.8718 100.8461 1448437 209.3312 141.7751 11.90003510500959

Epoch: 2025-08-31T13:47Z

TLE epoch observation values (Epoch: 2025-08-31T13:47:33.993Z)

Latitude

0°

Longitude

-86.03822°

Altitude

2,701.909 km

Speed

6.216 km/s

True Right ascension

06h 43m 23s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

12:57:59

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,903.344 km

Perigee altitude

554.789 km

Semi-major axis

8,107.204 km

Eccentricity

0.14484

Inclination

32.8718°

RAAN

100.8461°

Arg. of periapsis

209.3312°

True anomaly

150.72536°

Mean anomaly

141.7751°

Eccentric anomaly

146.37114°

Mean motion

2.97328 °/min

Orbital period

121.08 mins

BSTAR

0.0004584

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Other satellites on launch #1 in the year 1959 (1959-02-17 UTC)

VANGUARD R/B, 12

VANGUARD DEB, 5807 (Decayed)

VANGUARD DEB, 14934 (Decayed)

VANGUARD DEB, 61446

VANGUARD 2 Visibility forecast

Observer location: undefined°, undefined°
Set Observer location

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	2025-08-31 22:22:16.053Z	268.919° W	2025-08-31 22:35:16.053Z	206.863° SW	38.353°	2025-08-31 22:43:16.053Z	128.129° SE
11 mins	2025-09-01 00:37:16.053Z	260.619° W	2025-09-01 00:43:16.053Z	222.73° SW	20.7°	2025-09-01 00:48:16.053Z	177.466° S
26 mins	2025-09-01 16:03:16.053Z	197.279° SSW	2025-09-01 16:16:16.053Z	144.36° SSE	28.338°	2025-09-01 16:29:16.053Z	91.245° ESE
29 mins	2025-09-01 18:11:16.053Z	232.372° WSW	2025-09-01 18:27:16.053Z	158.753° S	39.535°	2025-09-01 18:40:16.053Z	90.69° ESE
25 mins	2025-09-01 20:23:16.053Z	257.019° W	2025-09-01 20:38:16.053Z	177.587° S	42.122°	2025-09-01 20:48:16.053Z	105.414° ESE