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ESSA 3 (TOS-A), 2435

Orbit data source: Space-Track

ESSA 3 (TOS-A), 2435 is a payload satellite owned by ESSA (US) in SSO that was launched on Sun, 02 Oct 1966 UTC via a THOR DELTA E launch vehicle from the Air Force Western Test Range (AFWTR). 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/2435?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/2435?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

2435, 1966-087A

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

148 kg wet, 148 kg dry

Launch date (UTC)

1966-10-02 (59 years ago)

Launch vehicle

THOR DELTA E

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 17 hours ago

TLE from 17 hours ago

0 ESSA 3 (TOS-A)
1 02435U 66087A   26008.50782333 -.00000015  00000-0  15675-3 0  9992
2 02435 101.0882 280.8461 0064054 357.1791 176.2529 12.56878349718941

Epoch: 2026-01-08T12:11Z

TLE epoch observation values (Epoch: 2026-01-08T12:11:15.935Z)

Latitude

6.3287°

Longitude

171.20814°

Altitude

1,487.822 km

Speed

7.098 km/s

True Right ascension

06h 48m 20s

True Declination

6° 17' 41"

Sunlit

Object was in full shadow 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

05:30:10

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,483.391 km

Perigee altitude

1,383.32 km

Semi-major axis

7,811.493 km

Eccentricity

0.00641

Inclination

101.0882°

RAAN

280.8461°

Arg. of periapsis

357.1791°

True anomaly

176.30049°

Mean anomaly

176.2529°

Eccentric anomaly

176.27673°

Mean motion

3.14371 °/min

Orbital period

114.51 mins

BSTAR

0.00015675

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Other satellites on launch #87 in the year 1966 (1966-10-02 UTC)

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ESSA 3 (TOS-A) 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.
15 mins	2026-01-09 06:59:36.411Z	17.45° NNE	2026-01-09 07:06:36.411Z	148.974° SSE	44.946°	2026-01-09 07:14:36.411Z	197.504° SSW
10 mins	2026-01-09 08:53:36.411Z	343.343° N	2026-01-09 08:57:36.411Z	310.166° NW	20.574°	2026-01-09 09:03:36.411Z	262.496° W
10 mins	2026-01-09 16:06:36.411Z	93.187° ESE	2026-01-09 16:10:36.411Z	58.289° ENE	21.25°	2026-01-09 16:16:36.411Z	8.646° NNE
14 mins	2026-01-09 17:56:36.411Z	167.454° S	2026-01-09 18:02:36.411Z	249.714° W	44.629°	2026-01-09 18:10:36.411Z	341.581° N
5 mins	2026-01-09 19:54:36.411Z	257.45° W	2026-01-09 19:56:36.411Z	273.506° WNW	13.465°	2026-01-09 19:59:36.411Z	296.512° NW

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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 3 (TOS-A), 2435 on other resources

View ESSA 3 (TOS-A), 2435 on NASA - NSSDCA Website

View ESSA 3 (TOS-A), 2435 on Heavens-Above

View ESSA 3 (TOS-A), 2435 on Keep Track

View ESSA 3 (TOS-A), 2435 on Celestrak

View ESSA 3 (TOS-A), 2435 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 3 (TOS-A), 2435

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 17 hours ago

TLE from 17 hours ago

TLE epoch observation values (Epoch: 2026-01-08T12:11:15.935Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #87 in the year 1966 (1966-10-02 UTC)

ESSA 3 (TOS-A) Visibility forecast

Co-orbital & Co-planar RSOs

Check out ESSA 3 (TOS-A), 2435 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 17 hours ago