ESSA 1 (OT-3), 1982
Orbit data source: Space-Track
ESSA 1 (OT-3), 1982 is a payload satellite owned by ESSA (US) in SSO that was launched on Thu, 03 Feb 1966 UTC via a THOR DELTA C 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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1982 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
RCA/East Windsor
Mission
Non-operational Civil Weather
Bus & Motor
TIROS I, Unknown motor
Mass
138 kg wet, 138 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.5 m
Radar Cross Section
0.920 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 19 hours ago
TLE from 19 hours ago
0 ESSA 1 (OT-3)
1 01982U 66008A 25260.64292167 .00000136 00000-0 46148-4 0 9999
2 01982 97.8521 307.3741 0078991 225.7388 133.7307 14.48174494118491Epoch: 2025-09-17T15:25Z
TLE epoch observation values (Epoch: 2025-09-17T15:25:48.432Z)
Latitude
0.00002°
Longitude
79.10637°
Altitude
773.656 km
Speed
7.447 km/s
True Right ascension
20h 29m 29s
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
03:27:25
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
784.836 km
Perigee altitude
672.561 km
Semi-major axis
7,106.835 km
Eccentricity
0.0079
Inclination
97.8521°
RAAN
307.3741°
Arg. of periapsis
225.7388°
True anomaly
134.38032°
Mean anomaly
133.7307°
Eccentric anomaly
134.05596°
Mean motion
3.62267 °/min
Orbital period
99.37 mins
BSTAR
0.000046148
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Other satellites on launch #8 in the year 1966 (1966-02-03 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.ESSA 1 (OT-3) 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-09-18 15:14:28.981Z | 40.044° NE | 2025-09-18 15:18:28.981Z | 102.523° ESE | 24.593° | 2025-09-18 15:21:28.981Z | 147.772° SSE |
| 7 mins | 2025-09-18 16:53:28.981Z | 342.057° N | 2025-09-18 16:56:28.981Z | 290.642° WNW | 26.887° | 2025-09-18 17:00:28.981Z | 231.724° WSW |
| 7 mins | 2025-09-19 02:24:28.981Z | 116.909° SE | 2025-09-19 02:27:28.981Z | 63.863° ENE | 27.715° | 2025-09-19 02:31:28.981Z | 9.499° NNE |
| 7 mins | 2025-09-19 04:02:28.981Z | 214.381° SW | 2025-09-19 04:05:28.981Z | 263.085° W | 26.822° | 2025-09-19 04:09:28.981Z | 321.906° NNW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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