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ESSA 8 (TOS-F), 3615

Orbit data source: Space-Track

ESSA 8 (TOS-F), 3615 is a payload satellite owned by ESSA (US) in SSO that was launched on Sun, 15 Dec 1968 UTC via a THOR DELTA N 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/3615?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/3615?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

3615, 1968-114A

Orbit

SSO

Last TLE update

14 hours ago

Origin

National Oceanic and Atmospheric Administration (US)

Manufacturer

RCA/East Windsor

Mission

Non-operational Civil Weather

Bus & Motor

TIROS I, Unknown motor

Mass

131 kg wet, 131 kg dry

Launch date (UTC)

1968-12-15 (56 years ago)

Launch vehicle

THOR DELTA N

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 1.07 m

Radar Cross Section

0.920 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 14 hours ago

0 ESSA 8 (TOS-F)
1 03615U 68114A   25128.74646877 -.00000047  00000-0 -16016-4 0  9993
2 03615 101.6475  77.7620 0032206  29.7161 330.5735 12.56242048585771

Epoch: 2025-05-08T17:54Z

Definitive object data (Epoch: 2025-05-08T17:54:54.901Z)

Latitude

0°

Longitude

-57.77929°

Altitude

1,419.169 km

Speed

7.161 km/s

True Right ascension

05h 11m 02s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

15.41278°

Longitude

126.04785°

Altitude

1,458.378 km

Speed

7.126 km/s

Apparent Right ascension

19h 11m 46s

Apparent Declination

-31° 59' 17"

Sunlit

Object is in full shadow

Visualization observer readout

Local Sidereal Time

16:18:54

Azimuth

144.122° SSE

Elevation

7.711°

Doppler factor

Orbital elements

Apogee altitude

1,461.193 km

Perigee altitude

1,410.861 km

Semi-major axis

7,814.164 km

Eccentricity

0.0032206

Inclination

101.6475°

RAAN

77.762°

Arg. of periapsis

29.7161°

True anomaly

330.39154°

Mean anomaly

330.5735°

Eccentric anomaly

330.48259°

Mean motion

3.1421 °/min

BSTAR

-0.000016016

Orbital period

114.57 mins

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Other satellites on launch #114 in the year 1968 (1968-12-15 UTC)

ESSA 8 (TOS-F) 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.
15 mins	2025-05-09 09:48:47.760Z	13.977° NNE	2025-05-09 09:55:47.760Z	318.781° NNW	44.173°	2025-05-09 10:03:47.760Z	206.56° SW
8 mins	2025-05-09 11:43:47.760Z	339.434° N	2025-05-09 11:47:47.760Z	306.772° NW	17.025°	2025-05-09 11:51:47.760Z	275.871° WNW
11 mins	2025-05-09 18:55:47.760Z	105.457° ESE	2025-05-09 19:00:47.760Z	57.766° ENE	26.579°	2025-05-09 19:06:47.760Z	4.544° NNE
14 mins	2025-05-09 20:46:47.760Z	179.704° S	2025-05-09 20:52:47.760Z	254.754° W	41.594°	2025-05-09 21:00:47.760Z	336.363° NNW

Authenticating...

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Check out ESSA 8 (TOS-F), 3615 on other resources

View ESSA 8 (TOS-F), 3615 on NASA - NSSDCA Website

View ESSA 8 (TOS-F), 3615 on Heavens-Above

View ESSA 8 (TOS-F), 3615 on Keep Track

View ESSA 8 (TOS-F), 3615 on Celestrak

View ESSA 8 (TOS-F), 3615 on Gunter's Space Page

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