OBJECT R, 43891

Orbit data source: Space-Track

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Recently launched and/or uncataloged RSOs may have evolving metadata. Metadata may include the following, but is not limited to: Owner, Manufacturer, Bus, Motor, and Mission.

OBJECT R, 43891 is a satellite in SSO that was launched on Thu, 27 Dec 2018 UTC via a SOYUZ-2-1A launch vehicle from the Vostochny Cosmodrome (VOSTO). Unknown objects in Earth's orbit typically refer to objects detected orbiting the Earth but have not yet been identified or cataloged. These objects could be anything from previously untracked satellites, spent rocket stages, debris from satellite collisions, or even natural meteoroids temporarily captured by Earth's gravity.

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<iframe src="https://www.satcat.com/sats-embedded/43891?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/43891?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

43891, 2018-111R

Orbit

SSO

Country

TBD

Related business

None

Manufacturer

Unknown

Mission

Non-operational Civil Technology

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

2018-12-27 (8 years ago)

Launch vehicle

SOYUZ-2-1A

Launch site

Vostochny Cosmodrome (VOSTO)

Object type

Unknown

Shape & HBR

Box, 0.2 m

Radar Cross Section

0.080 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 13 hours ago

TLE from 13 hours ago

0 OBJECT R
1 43891U 18111R   26255.33153571  .00001553  00000-0  43305-4 0  9998
2 43891  97.0049  87.0629 0017918 317.6736  42.3126 15.38069310429826

Epoch: 2026-09-12T07:57Z

TLE epoch observation values (Epoch: 2026-09-12T07:57:24.685Z)

Latitude

-0.00006°

Longitude

-23.63201°

Altitude

445.903 km

Speed

7.65 km/s

True Right ascension

05h 48m 15s

True Declination

0° 00' 00"

Sunlit

Object was in daylight 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

13:44:14

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

460.976 km

Perigee altitude

436.511 km

Semi-major axis

6,826.881 km

Eccentricity

0.00179

Inclination

97.0049°

RAAN

87.0629°

Arg. of periapsis

317.6736°

True anomaly

42.45105°

Mean anomaly

42.3126°

Eccentric anomaly

42.3818°

Mean motion

3.84778 °/min

Orbital period

93.56 mins

BSTAR

0.000043305

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Other satellites on launch #111 in the year 2018 (2018-12-27 UTC)

LUME-1, 43908 (Decayed)

LEMUR 2 SARAHBETTYBOO, 43888 (Decayed)

FLOCK 3K 8, 43901 (Decayed)

LEMUR 2 CHRISTINAHOLT, 43882 (Decayed)

FLOCK 3K 12, 43903 (Decayed)

ZACUBE-2, 43907 (Decayed)

ISAT, 43879

GRUS-1A, 43890

LEMUR 2 DAISY-HARPER, 43889 (Decayed)

FLOCK 3K 6, 43896 (Decayed)

FLOCK 3K 2, 43895 (Decayed)

FLOCK 3K 4, 43893 (Decayed)

FLOCK 3K 7, 43902 (Decayed)

FLOCK 3K 10, 43905 (Decayed)

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OBJECT R 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.
6 mins	2026-09-13 01:41:08.977Z	13.052° NNE	2026-09-13 01:44:08.977Z	39.939° NE	76.454°	2026-09-13 01:47:08.977Z	189.616° SSW

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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 OBJECT R, 43891 on other resources

View OBJECT R, 43891 on Heavens-Above

View OBJECT R, 43891 on Keep Track

View OBJECT R, 43891 on Celestrak

View OBJECT R, 43891 on Gunter's Space Page

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

OBJECT R, 43891

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-09-12T07:57:24.685Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #111 in the year 2018 (2018-12-27 UTC)

OBJECT R Visibility forecast

Co-orbital & Co-planar RSOs

Check out OBJECT R, 43891 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 13 hours ago