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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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Identifier

1982, 1966-008A

Orbit

SSO

Country

Related business

National Oceanic and Atmospheric Administration (US)

Manufacturer

RCA/East Windsor

Mission

Non-operational spacecraft

Bus & Motor

TIROS I, Unknown motor

Mass

138 kg wet, 138 kg dry

Launch date (UTC)

1966-02-03 (61 years ago)

Launch vehicle

THOR DELTA C

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

CYL, 0.6 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 6 hours ago

TLE from 6 hours ago

0 ESSA 1 (OT-3)
1 01982U 66008A   26240.53001299  .00000099  00000-0  36435-4 0  9996
2 01982  97.8084 267.0074 0078491 239.8422 119.4980 14.48365610168413

Epoch: 2026-08-28T12:43Z

TLE epoch observation values (Epoch: 2026-08-28T12:43:13.122Z)

Latitude

0.00002°

Longitude

99.44974°

Altitude

761.784 km

Speed

7.459 km/s

True Right ascension

17h 48m 01s

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

10:17:22

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

783.848 km

Perigee altitude

672.293 km

Semi-major axis

7,106.208 km

Eccentricity

0.00785

Inclination

97.8084°

RAAN

267.0074°

Arg. of periapsis

239.8422°

True anomaly

120.27706°

Mean anomaly

119.498°

Eccentric anomaly

119.88791°

Mean motion

3.62315 °/min

Orbital period

99.36 mins

BSTAR

0.000036435

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Other satellites on launch #8 in the year 1966 (1966-02-03 UTC)

DELTA 1 R/B, 1983

DELTA 1 DEB, 2154

DELTA 1 DEB, 2118

DELTA 1 DEB, 2085 (Decayed)

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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.
5 mins	2026-08-29 00:29:50.369Z	94.503° ESE	2026-08-29 00:32:50.369Z	56.614° ENE	15.286°	2026-08-29 00:34:50.369Z	32.24° NE
8 mins	2026-08-29 02:06:50.369Z	181.968° SSW	2026-08-29 02:09:50.369Z	237.099° WSW	41.826°	2026-08-29 02:14:50.369Z	340.618° N
7 mins	2026-08-29 14:11:50.369Z	37.498° NE	2026-08-29 14:14:50.369Z	100.155° ESE	33.765°	2026-08-29 14:18:50.369Z	166.275° S
5 mins	2026-08-29 15:50:50.369Z	325.223° NNW	2026-08-29 15:52:50.369Z	293.842° NW	20.083°	2026-08-29 15:55:50.369Z	251.279° W

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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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Check out ESSA 1 (OT-3), 1982 on other resources

View ESSA 1 (OT-3), 1982 on NASA - NSSDCA Website

View ESSA 1 (OT-3), 1982 on Heavens-Above

View ESSA 1 (OT-3), 1982 on Keep Track

View ESSA 1 (OT-3), 1982 on Celestrak

View ESSA 1 (OT-3), 1982 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

ESSA 1 (OT-3), 1982

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-08-28T12:43:13.122Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #8 in the year 1966 (1966-02-03 UTC)

ESSA 1 (OT-3) Visibility forecast

Co-orbital & Co-planar RSOs

Check out ESSA 1 (OT-3), 1982 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 hours ago