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ESSA 2 (OT-2), 2091

Orbit data source: Space-Track

ESSA 2 (OT-2), 2091 is a payload satellite owned by ESSA (US) in SSO that was launched on Mon, 28 Feb 1966 UTC via a THOR DELTA E 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
2091, 1966-016A
Orbit
SSO
Last TLE update
21 hours ago
Origin
Manufacturer
RCA/East Windsor
Mission
Non-operational Civil Weather
Bus & Motor
TIROS I, Unknown motor
Mass
130 kg wet, 130 kg dry
Launch date (UTC)
1966-02-28 (59 years ago)
Launch vehicle
THOR DELTA E
Launch site
Air Force Eastern Test Range (AFETR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Cyl, 1.07 m
Radar Cross Section
0.920 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 21 hours ago
0 ESSA 2 (OT-2)
1 02091U 66016A   25162.76028666 -.00000035  00000-0  45149-4 0  9994
2 02091 101.2457  76.0182 0038382 288.6694  92.5971 12.69422793746628
Epoch: 2025-06-11T18:14Z
TLE epoch observation values (Epoch: 2025-06-11T18:14:48.767Z)
Latitude
21.27957°
Longitude
-102.44259°
Altitude
1,388.103 km
Speed
7.167 km/s
True Right ascension
04h 46m 23s
True Declination
21° 10' 23"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
42.67222°
Longitude
93.35688°
Altitude
1,416.253 km
Speed
7.144 km/s
Apparent Right ascension
16h 06m 27s
Apparent Declination
7° 13' 42"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
02:03:55
Azimuth
321.883° NNW
Elevation
-35.028°
Doppler factor
1
Orbital elements
Apogee altitude
1,411.568 km
Perigee altitude
1,352 km
Semi-major axis
7,759.921 km
Eccentricity
0.00384
Inclination
101.2457°
RAAN
76.0182°
Arg. of periapsis
288.6694°
True anomaly
Unknown
Mean anomaly
92.5971°
Eccentric anomaly
Unknown
Mean motion
3.1751 °/min
Orbital period
113.38 mins
BSTAR
0.000045149
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Other satellites on launch #16 in the year 1966 (1966-02-28 UTC)

ESSA 2 (OT-2) Visibility forecast

Observer location: undefined°, undefined°

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.
13 mins2025-06-12 16:57:32.005Z125.195° SE2025-06-12 17:04:32.005Z55.624° ENE32.8°2025-06-12 17:10:32.005Z359.969° N
13 mins2025-06-12 18:49:32.005Z194.742° SSW2025-06-12 18:55:32.005Z261.385° W35.276°2025-06-12 19:02:32.005Z329.309° NNW
14 mins2025-06-13 06:42:32.005Z28.06° NE2025-06-13 06:48:32.005Z93.584° ESE40.424°2025-06-13 06:56:32.005Z180.891° SSW
12 mins2025-06-13 08:34:32.005Z352.02° N2025-06-13 08:39:32.005Z304.947° NW27.881°2025-06-13 08:46:32.005Z243.416° WSW
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