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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: 11 hours ago

TLE from 11 hours ago

0 ESSA 3 (TOS-A)
1 02435U 66087A   25310.29412947 -.00000026  00000-0  89739-4 0  9999
2 02435 101.0842 221.3833 0064239 122.6983 350.1386 12.56876607711002

Epoch: 2025-11-06T07:03Z

TLE epoch observation values (Epoch: 2025-11-06T07:03:32.786Z)

Latitude

64.94363°

Longitude

-85.61452°

Altitude

1,397.47 km

Speed

7.19 km/s

True Right ascension

04h 24m 06s

True Declination

64° 49' 20"

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

14:04:07

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,483.543 km

Perigee altitude

1,383.182 km

Semi-major axis

7,811.5 km

Eccentricity

0.00642

Inclination

101.0842°

RAAN

221.3833°

Arg. of periapsis

122.6983°

True anomaly

350.01152°

Mean anomaly

350.1386°

Eccentric anomaly

350.07516°

Mean motion

3.1437 °/min

Orbital period

114.51 mins

BSTAR

0.000089739

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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	2025-11-06 18:00:47.125Z	162.967° S	2025-11-06 18:08:47.125Z	307.849° NW	44.854°	2025-11-06 18:15:47.125Z	342.618° N
7 mins	2025-11-06 19:58:47.125Z	244.026° WSW	2025-11-06 20:01:47.125Z	267.754° W	15.403°	2025-11-06 20:05:47.125Z	299.402° NW
12 mins	2025-11-07 06:02:47.125Z	42.785° NE	2025-11-07 06:07:47.125Z	90.569° ESE	28.084°	2025-11-07 06:14:47.125Z	155.82° SSE
13 mins	2025-11-07 07:54:47.125Z	3.999° NNE	2025-11-07 08:00:47.125Z	300.71° NW	38.483°	2025-11-07 08:07:47.125Z	223.132° SW
12 mins	2025-11-07 16:59:47.125Z	121.806° SE	2025-11-07 17:05:47.125Z	56.083° ENE	33.322°	2025-11-07 17:11:47.125Z	0.027° NNE

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: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2025-11-06T07:03:32.786Z)

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: 11 hours ago