CAT 3, 12546
Orbit data source: Space-Track
CAT 3, 12546 is a payload satellite owned by ESA (ESA) in HEO that was launched on Fri, 19 Jun 1981 UTC via an ARIANE 1 launch vehicle from the French Guiana (FRGUI). 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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12546 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
ESARelated business
Manufacturer
AERIT/CNEST
Mission
Non-operational Civil Technology
Bus & Motor
CAT, Unknown motor
Mass
266 kg wet, 266 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.6 m
Radar Cross Section
1.319 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 CAT 3
1 12546U 81057C 25260.69539995 .00001861 00000-0 45978-3 0 9991
2 12546 10.1914 85.7216 5692464 326.7904 7.7840 4.48772994402794Epoch: 2025-09-17T16:41Z
TLE epoch observation values (Epoch: 2025-09-17T16:41:22.555Z)
Latitude
0.00009°
Longitude
-161.44407°
Altitude
737.059 km
Speed
9.293 km/s
True Right ascension
05h 43m 04s
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
12:52:25
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
17,993.135 km
Perigee altitude
311.707 km
Semi-major axis
15,530.558 km
Eccentricity
0.56925
Inclination
10.1914°
RAAN
85.7216°
Arg. of periapsis
326.7904°
True anomaly
33.10283°
Mean anomaly
7.784°
Eccentric anomaly
17.70036°
Mean motion
1.12141 °/min
Orbital period
321.03 mins
BSTAR
0.00045978
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Other satellites on launch #57 in the year 1981 (1981-06-19 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.CAT 3 Visibility forecast
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 226 mins | 2025-09-18 20:00:56.343Z | 222.553° SW | 2025-09-18 20:53:56.343Z | 178.337° S | 36.152° | 2025-09-18 23:46:56.343Z | 132.677° SE |
| 178 mins | 2025-09-19 17:02:56.343Z | 208.498° SW | 2025-09-19 17:23:56.343Z | 152.775° SSE | 30.18° | 2025-09-19 20:00:56.343Z | 111.906° ESE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in ascending order |
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