COSMOS 1823, 17535
Orbit data source: Space-Track
COSMOS 1823, 17535 is a payload satellite owned by VTS SA (CIS) in LEO that was launched on Fri, 20 Feb 1987 UTC via a TSIKLON-3 launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). 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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17535 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
NPO PM
Mission
Defense Geodetic
Bus & Motor
KAUR-1 11F666, Unknown motor
Mass
1,545 kg wet, 1,545 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 2.9 m
Radar Cross Section
13.195 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 COSMOS 1823
1 17535U 87020A 26171.42830432 -.00000023 00000-0 -41155-4 0 9998
2 17535 73.6020 38.5723 0028622 242.2358 291.3735 12.41380511782266Epoch: 2026-06-20T10:16Z
TLE epoch observation values (Epoch: 2026-06-20T10:16:45.493Z)
Latitude
6.3585°
Longitude
153.86966°
Altitude
1,494.342 km
Speed
7.121 km/s
True Right ascension
14h 26m 48s
True Declination
6° 19' 27"
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
06:30:47
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,521.18 km
Perigee altitude
1,476.09 km
Semi-major axis
7,876.772 km
Eccentricity
0.00286
Inclination
73.602°
RAAN
38.5723°
Arg. of periapsis
242.2358°
True anomaly
291.06768°
Mean anomaly
291.3735°
Eccentric anomaly
291.22063°
Mean motion
3.10471 °/min
Orbital period
115.95 mins
BSTAR
-0.000041155
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Other satellites on launch #20 in the year 1987 (1987-02-20 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.COSMOS 1823 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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-06-22 23:49:17.801Z | 12.459° NNE | 2026-06-22 23:53:17.801Z | 40.915° NE | 15.561° | 2026-06-22 23:58:17.801Z | 76.821° E |
| 16 mins | 2026-06-23 01:46:17.801Z | 346.056° N | 2026-06-23 01:54:17.801Z | 76.027° E | 42.828° | 2026-06-23 02:02:17.801Z | 149.641° SSE |
| 12 mins | 2026-06-23 03:46:17.801Z | 310.876° NW | 2026-06-23 03:51:17.801Z | 271.102° WNW | 23.445° | 2026-06-23 03:58:17.801Z | 216.665° SW |
| 14 mins | 2026-06-23 14:48:17.801Z | 153.232° SSE | 2026-06-23 14:55:17.801Z | 90.401° ESE | 30.059° | 2026-06-23 15:02:17.801Z | 36.76° NE |
| 16 mins | 2026-06-23 16:45:17.801Z | 223.237° SW | 2026-06-23 16:53:17.801Z | 304.342° NW | 38.359° | 2026-06-23 17:01:17.801Z | 11.097° NNE |
| 4 mins | 2026-06-23 18:52:17.801Z | 309.898° NW | 2026-06-23 18:54:17.801Z | 323.771° NNW | 12.113° | 2026-06-23 18:56:17.801Z | 337.439° NNW |
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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