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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2435 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
148 kg wet, 148 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: 16 hours ago
TLE from 16 hours ago
0 ESSA 3 (TOS-A)
1 02435U 66087A 25362.73606373 -.00000036 00000-0 34897-4 0 9999
2 02435 101.0881 270.7125 0064162 18.6092 36.6748 12.56878073717594Epoch: 2025-12-28T17:39Z
TLE epoch observation values (Epoch: 2025-12-28T17:39:55.906Z)
Latitude
54.28151°
Longitude
-107.44963°
Altitude
1,404.515 km
Speed
7.181 km/s
True Right ascension
16h 59m 54s
True Declination
54° 07' 55"
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
09:01:02
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,483.477 km
Perigee altitude
1,383.237 km
Semi-major axis
7,811.494 km
Eccentricity
0.00642
Inclination
101.0881°
RAAN
270.7125°
Arg. of periapsis
18.6092°
True anomaly
37.11678°
Mean anomaly
36.6748°
Eccentric anomaly
36.8955°
Mean motion
3.14371 °/min
Orbital period
114.51 mins
BSTAR
0.000034897
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Other satellites on launch #87 in the year 1966 (1966-10-02 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 3 (TOS-A) 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. |
|---|---|---|---|---|---|---|---|
| 12 mins | 2025-12-29 16:27:08.807Z | 109.876° ESE | 2025-12-29 16:33:08.807Z | 53.524° ENE | 26.343° | 2025-12-29 16:39:08.807Z | 3.378° NNE |
| 14 mins | 2025-12-29 18:18:08.807Z | 179.427° S | 2025-12-29 18:25:08.807Z | 267.57° W | 41.147° | 2025-12-29 18:32:08.807Z | 335.692° NNW |
| 14 mins | 2025-12-30 06:18:08.807Z | 30.613° NE | 2025-12-30 06:25:08.807Z | 105.291° ESE | 37.132° | 2025-12-30 06:32:08.807Z | 171.88° S |
| 13 mins | 2025-12-30 08:11:08.807Z | 357.431° N | 2025-12-30 08:17:08.807Z | 300.168° NW | 31.886° | 2025-12-30 08:24:08.807Z | 236.866° 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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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