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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

Last TLE update

1 day ago

Origin

National Oceanic and Atmospheric Administration (US)

Manufacturer

RCA/East Windsor

Mission

Non-operational Civil Weather

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

Cyl, 0.6 m

Radar Cross Section

0.994 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 1 day ago

0 ESSA 3 (TOS-A)
1 02435U 66087A   25200.36986676 -.00000051  00000-0 -53031-4 0  9995
2 02435 101.0865 118.0061 0063899 342.8727 129.3240 12.56874820697198

Epoch: 2025-07-19T08:52Z

TLE epoch observation values (Epoch: 2025-07-19T08:52:36.488Z)

Latitude

64.89679°

Longitude

-107.9594°

Altitude

1,478.757 km

Speed

7.115 km/s

True Right ascension

21h 30m 24s

True Declination

64° 46' 36"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-13.68929°

Longitude

51.11498°

Altitude

1,391.55 km

Speed

7.186 km/s

Apparent Right ascension

08h 49m 22s

Apparent Declination

-25° 57' 56"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

21:55:40

Azimuth

49.754° ENE

Elevation

-70.364°

Doppler factor

Orbital elements

Apogee altitude

1,483.285 km

Perigee altitude

1,383.455 km

Semi-major axis

7,811.507 km

Eccentricity

0.00639

Inclination

101.0865°

RAAN

118.0061°

Arg. of periapsis

342.8727°

True anomaly

129.88757°

Mean anomaly

129.324°

Eccentric anomaly

129.60607°

Mean motion

3.1437 °/min

Orbital period

114.51 mins

BSTAR

-0.000053031

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

ESSA 3 (TOS-A) 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.
9 mins	2025-07-20 09:42:32.656Z	346.087° N	2025-07-20 09:47:32.656Z	308.767° NW	16.544°	2025-07-20 09:51:32.656Z	278.287° WNW
11 mins	2025-07-20 16:55:32.656Z	104.58° ESE	2025-07-20 17:00:32.656Z	56.075° ENE	26.25°	2025-07-20 17:06:32.656Z	4.725° NNE
14 mins	2025-07-20 18:45:32.656Z	178.071° S	2025-07-20 18:52:32.656Z	261.642° W	41.707°	2025-07-20 18:59:32.656Z	335.68° NNW
14 mins	2025-07-21 06:46:32.656Z	33.316° NE	2025-07-21 06:52:32.656Z	96.755° ESE	36.851°	2025-07-21 07:00:32.656Z	172.705° S
14 mins	2025-07-21 08:38:32.656Z	359.197° N	2025-07-21 08:45:32.656Z	290.913° WNW	32.341°	2025-07-21 08:52:32.656Z	234.323° WSW

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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Authenticating...

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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.