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EXPLORER 11, 107

Orbit data source: Space-Track

EXPLORER 11, 107 is a payload satellite owned by GSFC (US) in LEO that was launched on Thu, 27 Apr 1961 UTC via a JUNO II 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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Identifier
107, 1961-013A
Orbit
LEO
Last TLE update
14 hours ago
Origin
Manufacturer
NASA MSFC
Mission
Civil Astronomy
Bus & Motor
S-15, Unknown motor
Mass
45 kg wet, 40 kg dry
Launch date (UTC)
1961-04-27 (64 years ago)
Launch vehicle
JUNO II
Launch site
Air Force Eastern Test Range (AFETR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Cyl, 0.6 m
Radar Cross Section
0.295 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 14 hours ago
0 EXPLORER 11
1 00107U 61013A   25199.88645024  .00001164  00000-0  12268-3 0  9996
2 00107  28.7900  75.1250 0503638 260.3779  93.9564 14.19872543229042
Epoch: 2025-07-18T21:16Z
TLE epoch observation values (Epoch: 2025-07-18T21:16:29.3Z)
Latitude
-0.00004°
Longitude
179.07138°
Altitude
867.224 km
Speed
7.399 km/s
True Right ascension
05h 00m 29s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
18.77351°
Longitude
-146.22609°
Altitude
1,075.598 km
Speed
7.189 km/s
Apparent Right ascension
09h 06m 17s
Apparent Declination
-9° 32' 03"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
23:48:01
Azimuth
60.994° ENE
Elevation
-43.002°
Doppler factor
1
Orbital elements
Apogee altitude
1,192.81 km
Perigee altitude
466.773 km
Semi-major axis
7,207.929 km
Eccentricity
0.05036
Inclination
28.79°
RAAN
75.125°
Arg. of periapsis
260.3779°
True anomaly
99.67948°
Mean anomaly
93.9564°
Eccentric anomaly
96.82161°
Mean motion
3.54672 °/min
Orbital period
101.5 mins
BSTAR
0.00012268
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