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COSMOS 1878, 18337

Orbit data source: Space-Track

COSMOS 1878, 18337 is a payload satellite owned by UNKS (CIS) in LEO that was launched on Mon, 07 Sep 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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https://www.satcat.com/sats-embedded/18337?theme=dark&initialShowStats=false

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Identifier

18337, 1987-074D

Orbit

LEO

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

NPO PM

Mission

Defense Communications

Bus & Motor

STRELA-3, Unknown motor

Mass

225 kg wet, 225 kg dry

Launch date (UTC)

1987-09-07 (38 years ago)

Launch vehicle

TSIKLON-3

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 0.8 m

Radar Cross Section

1.257 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 COSMOS 1878
1 18337U 87074D   26061.62342925  .00000014  00000-0  17572-4 0  9997
2 18337  82.5751   1.0228 0004130 102.0081  70.7422 12.64382628775828

Epoch: 2026-03-02T14:57Z

TLE epoch observation values (Epoch: 2026-03-02T14:57:44.287Z)

Latitude

7.07644°

Longitude

155.25172°

Altitude

1,405.944 km

Speed

7.158 km/s

True Right ascension

12h 00m 24s

True Declination

7° 02' 17"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

07:10:44

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,405.438 km

Perigee altitude

1,399.012 km

Semi-major axis

7,780.362 km

Eccentricity

0.00041

Inclination

82.5751°

RAAN

1.0228°

Arg. of periapsis

102.0081°

True anomaly

70.78689°

Mean anomaly

70.7422°

Eccentric anomaly

70.76454°

Mean motion

3.16259 °/min

Orbital period

113.83 mins

BSTAR

0.000017572

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Other satellites on launch #74 in the year 1987 (1987-09-07 UTC)

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COSMOS 1878 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	2026-03-03 05:52:30.153Z	29.452° NE	2026-03-03 05:56:30.153Z	60.805° ENE	16.71°	2026-03-03 06:01:30.153Z	99.786° ESE
15 mins	2026-03-03 07:45:30.153Z	352.58° N	2026-03-03 07:52:30.153Z	0.776° NNE	44.901°	2026-03-03 08:00:30.153Z	174.484° S
7 mins	2026-03-03 09:43:30.153Z	305.345° NW	2026-03-03 09:46:30.153Z	281.134° WNW	15.811°	2026-03-03 09:50:30.153Z	250.57° W
7 mins	2026-03-03 18:42:30.153Z	100.6° ESE	2026-03-03 18:45:30.153Z	76.704° E	15.449°	2026-03-03 18:49:30.153Z	46.337° ENE
14 mins	2026-03-03 20:32:30.153Z	184.741° SSW	2026-03-03 20:38:30.153Z	179.656° S	44.706°	2026-03-03 20:46:30.153Z	7.873° NNE
8 mins	2026-03-03 22:31:30.153Z	268.258° W	2026-03-03 22:34:30.153Z	292.681° NW	17.038°	2026-03-03 22:39:30.153Z	332.422° NNW

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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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Check out COSMOS 1878, 18337 on other resources

View COSMOS 1878, 18337 on NASA - NSSDCA Website

View COSMOS 1878, 18337 on Heavens-Above

View COSMOS 1878, 18337 on Keep Track

View COSMOS 1878, 18337 on Celestrak

View COSMOS 1878, 18337 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

COSMOS 1878, 18337

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-03-02T14:57:44.287Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #74 in the year 1987 (1987-09-07 UTC)

COSMOS 1878 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 1878, 18337 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago