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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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
CYL, 0.6 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 4 hours ago
TLE from 4 hours ago
0 ESSA 8 (TOS-F)
1 03615U 68114A 26244.59128367 -.00000036 00000-0 52853-4 0 9991
2 03615 101.7061 193.2733 0031864 173.3714 186.7787 12.56250700646153Epoch: 2026-09-01T14:11Z
TLE epoch observation values (Epoch: 2026-09-01T14:11:26.909Z)
Latitude
-0.00001°
Longitude
-0.34479°
Altitude
1,465.779 km
Speed
7.119 km/s
True Right ascension
12h 53m 05s
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
10:23:11
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,460.893 km
Perigee altitude
1,411.095 km
Semi-major axis
7,814.131 km
Eccentricity
0.00319
Inclination
101.7061°
RAAN
193.2733°
Arg. of periapsis
173.3714°
True anomaly
186.73577°
Mean anomaly
186.7787°
Eccentric anomaly
186.75722°
Mean motion
3.14212 °/min
Orbital period
114.57 mins
BSTAR
0.000052853
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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. |
|---|---|---|---|---|---|---|---|
| 16 mins | 2026-09-01 20:00:54.131Z | 148.631° SSE | 2026-09-01 20:08:54.131Z | 73.262° E | 43.066° | 2026-09-01 20:16:54.131Z | 347.779° N |
| 11 mins | 2026-09-01 21:56:54.131Z | 220.252° SW | 2026-09-01 22:01:54.131Z | 263.429° W | 23.08° | 2026-09-01 22:07:54.131Z | 314.251° NW |
| 9 mins | 2026-09-02 08:04:54.131Z | 57.331° ENE | 2026-09-02 08:08:54.131Z | 91.867° ESE | 19.614° | 2026-09-02 08:13:54.131Z | 133.713° SE |
| 14 mins | 2026-09-02 09:55:54.131Z | 13.51° NNE | 2026-09-02 10:01:54.131Z | 319.437° NNW | 44.189° | 2026-09-02 10:09:54.131Z | 206.329° SW |
| 8 mins | 2026-09-02 11:49:54.131Z | 339.732° N | 2026-09-02 11:53:54.131Z | 306.882° NW | 16.834° | 2026-09-02 11:57:54.131Z | 275.694° 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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