COSMOS 1660, 15821
Orbit data source: Space-Track
COSMOS 1660, 15821 is a payload satellite owned by NPO PM (CIS) in LEO that was launched on Fri, 14 Jun 1985 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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15821 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
NPO PM
Mission
Spacecraft
Bus & Motor
KAUR-1 11F666, Unknown motor
Mass
1,556 kg wet, 1,556 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 COSMOS 1660
1 15821U 85047A 26171.44585442 -.00000029 00000-0 -85332-4 0 9992
2 15821 73.6220 181.0050 0026571 62.3242 50.4387 12.40797902857888Epoch: 2026-06-20T10:42Z
TLE epoch observation values (Epoch: 2026-06-20T10:42:01.821Z)
Latitude
62.12102°
Longitude
-101.72589°
Altitude
1,500.168 km
Speed
7.126 km/s
True Right ascension
21h 49m 46s
True Declination
61° 59' 31"
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
23:09:04
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,522.036 km
Perigee altitude
1,480.164 km
Semi-major axis
7,879.237 km
Eccentricity
0.00266
Inclination
73.622°
RAAN
181.005°
Arg. of periapsis
62.3242°
True anomaly
50.67393°
Mean anomaly
50.4387°
Eccentric anomaly
50.55627°
Mean motion
3.10325 °/min
Orbital period
116.01 mins
BSTAR
-0.000085332
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Other satellites on launch #47 in the year 1985 (1985-06-14 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 1660 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. |
|---|---|---|---|---|---|---|---|
| 14 mins | 2026-06-22 13:02:47.217Z | 319.767° NNW | 2026-06-22 13:09:47.217Z | 259.65° W | 28.852° | 2026-06-22 13:16:47.217Z | 205.138° SW |
| 12 mins | 2026-06-23 00:07:47.217Z | 139.08° SSE | 2026-06-23 00:12:47.217Z | 97.316° ESE | 24.471° | 2026-06-23 00:19:47.217Z | 42.3° NE |
| 15 mins | 2026-06-23 02:03:47.217Z | 214.544° SW | 2026-06-23 02:10:47.217Z | 289.898° WNW | 42.06° | 2026-06-23 02:18:47.217Z | 13.336° NNE |
| 7 mins | 2026-06-23 04:08:47.217Z | 297.448° NW | 2026-06-23 04:11:47.217Z | 319.858° NNW | 14.439° | 2026-06-23 04:15:47.217Z | 348.028° N |
| 14 mins | 2026-06-23 10:16:47.217Z | 0.151° NNE | 2026-06-23 10:23:47.217Z | 63.866° ENE | 29.104° | 2026-06-23 10:30:47.217Z | 118.706° SE |
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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