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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 (57 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   25181.78442715 -.00000031  00000-0  83924-4 0  9995
2 03615 101.6495 130.0887 0031528 286.2581  73.5025 12.56242720592437

Epoch: 2025-06-30T18:49Z

TLE epoch observation values (Epoch: 2025-06-30T18:49:34.505Z)

Latitude

-0.00011°

Longitude

-71.39431°

Altitude

1,434.149 km

Speed

7.148 km/s

True Right ascension

08h 40m 21s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

47.34989°

Longitude

122.05292°

Altitude

1,467.686 km

Speed

7.123 km/s

Apparent Right ascension

01h 55m 01s

Apparent Declination

49° 28' 06"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

20:32:30

Azimuth

51.227° ENE

Elevation

34.67°

Doppler factor

Orbital elements

Apogee altitude

1,460.661 km

Perigee altitude

1,411.388 km

Semi-major axis

7,814.161 km

Eccentricity

0.00315

Inclination

101.6495°

RAAN

130.0887°

Arg. of periapsis

286.2581°

True anomaly

Unknown

Mean anomaly

73.5025°

Eccentric anomaly

Unknown

Mean motion

3.1421 °/min

Orbital period

114.57 mins

BSTAR

0.000083924

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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.
11 mins	2025-07-01 08:54:18.267Z	51.486° ENE	2025-07-01 08:57:18.267Z	97.322° ESE	36.948°	2025-07-01 09:05:18.267Z	174.045° S
13 mins	2025-07-01 10:43:18.267Z	359.955° N	2025-07-01 10:49:18.267Z	306.993° NW	32.006°	2025-07-01 10:56:18.267Z	238.559° WSW
5 mins	2025-07-01 18:01:18.267Z	60.69° ENE	2025-07-01 18:03:18.267Z	45.279° ENE	13.47°	2025-07-01 18:06:18.267Z	22.958° NE
14 mins	2025-07-01 19:47:18.267Z	141.641° SSE	2025-07-01 19:54:18.267Z	58.673° ENE	41.243°	2025-07-01 20:01:18.267Z	350.761° N
12 mins	2025-07-01 21:41:18.267Z	212.982° SW	2025-07-01 21:47:18.267Z	267.891° W	25.775°	2025-07-01 21:53:18.267Z	318.523° NNW
9 mins	2025-07-02 07:50:18.267Z	60.656° ENE	2025-07-02 07:54:18.267Z	93.556° ESE	17.661°	2025-07-02 07:59:18.267Z	131.756° SE

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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

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