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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3615 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
RCA/East Windsor
Mission
Non-operational spacecraft
Bus & Motor
TIROS I, Unknown motor
Mass
131 kg wet, 131 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 ESSA 8 (TOS-F)
1 03615U 68114A 25301.47845572 -.00000012 00000-0 19862-3 0 9991
2 03615 101.6671 248.2483 0032255 53.0461 307.3560 12.56245493607464Epoch: 2025-10-28T11:28Z
TLE epoch observation values (Epoch: 2025-10-28T11:28:58.574Z)
Latitude
0.00003°
Longitude
38.93887°
Altitude
1,425.815 km
Speed
7.155 km/s
True Right ascension
16h 32m 59s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
10:00:33
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,461.218 km
Perigee altitude
1,410.809 km
Semi-major axis
7,814.151 km
Eccentricity
0.00323
Inclination
101.6671°
RAAN
248.2483°
Arg. of periapsis
53.0461°
True anomaly
307.06148°
Mean anomaly
307.356°
Eccentric anomaly
307.20881°
Mean motion
3.1421 °/min
Orbital period
114.57 mins
BSTAR
0.00019862
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Other satellites on launch #114 in the year 1968 (1968-12-15 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.ESSA 8 (TOS-F) 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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-10-29 18:16:19.791Z | 82.163° E | 2025-10-29 18:20:19.791Z | 50.682° ENE | 16.351° | 2025-10-29 18:24:19.791Z | 18.63° NNE |
| 14 mins | 2025-10-29 20:05:19.791Z | 151.557° SSE | 2025-10-29 20:11:19.791Z | 93.745° ESE | 43.985° | 2025-10-29 20:19:19.791Z | 346.21° N |
| 10 mins | 2025-10-29 22:00:19.791Z | 227.323° WSW | 2025-10-29 22:05:19.791Z | 270.766° WNW | 20.088° | 2025-10-29 22:10:19.791Z | 311.194° NW |
| 10 mins | 2025-10-30 08:07:19.791Z | 54.428° ENE | 2025-10-30 08:11:19.791Z | 89.994° E | 22.262° | 2025-10-30 08:17:19.791Z | 141.316° SSE |
| 14 mins | 2025-10-30 09:58:19.791Z | 11.072° NNE | 2025-10-30 10:05:19.791Z | 268.964° W | 43.055° | 2025-10-30 10:12:19.791Z | 210.989° SW |
| 7 mins | 2025-10-30 11:53:19.791Z | 332.752° NNW | 2025-10-30 11:56:19.791Z | 308.424° NW | 15.3° | 2025-10-30 12:00:19.791Z | 278.608° WNW |
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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