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LEMUR 2 MONSON, 42839

Orbit data source: Space-Track

LEMUR 2 MONSON, 42839 is a payload satellite owned by Spire (US) in SSO that was launched on Fri, 14 Jul 2017 UTC via a SOYUZ-2-1A launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). 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/42839?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

42839, 2017-042Q

Orbit

SSO

Country

Related business

Spire Global (US)

Manufacturer

Spire/Glasgow

Mission

Operational Commercial Com/MetRO

Bus & Motor

CUBESAT 3U, Unknown motor

Mass

4 kg wet, 4 kg dry

Launch date (UTC)

2017-07-14 (9 years ago)

Launch vehicle

SOYUZ-2-1A

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box, 0.5 m

Radar Cross Section

0.093 m², Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 15 hours ago

TLE from 15 hours ago

0 LEMUR 2 MONSON
1 42839U 17042Q   26088.01122905  .00018507  00000-0  72869-3 0  9990
2 42839  97.4048 269.2483 0005736 275.3292  84.7292 15.25653737475939

Epoch: 2026-03-29T00:16Z

TLE epoch observation values (Epoch: 2026-03-29T00:16:10.189Z)

Latitude

-0.00002°

Longitude

78.7826°

Altitude

491.561 km

Speed

7.619 km/s

True Right ascension

17h 56m 59s

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

20:33:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

489.718 km

Perigee altitude

481.844 km

Semi-major axis

6,863.918 km

Eccentricity

0.00057

Inclination

97.4048°

RAAN

269.2483°

Arg. of periapsis

275.3292°

True anomaly

84.79466°

Mean anomaly

84.7292°

Eccentric anomaly

84.76193°

Mean motion

3.81667 °/min

Orbital period

94.32 mins

BSTAR

0.00072869

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Other satellites on launch #42 in the year 2017 (2017-07-14 UTC)

OBJECT U, 42843

OBJECT AA, 42849

LEMUR 2 GREENBERG, 42837

NORSAT 1, 42826

CORVUS BC2, 42846

FLYING LAPTOP, 42831

LEMUR 2 FURIAUS, 42840

LEMUR 2 DEMBITZ, 42842

FLOCK 2K 41, 42875 (Decayed)

FLOCK 2K 16, 42889 (Decayed)

FLOCK 2K 21, 42860 (Decayed)

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LEMUR 2 MONSON 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	2026-03-30 00:26:32.490Z	30.102° NE	2026-03-30 00:29:32.490Z	89.934° E	30.917°	2026-03-30 00:32:32.490Z	163.442° S
5 mins	2026-03-30 12:36:32.490Z	208.563° SW	2026-03-30 12:38:32.490Z	257.906° W	27.904°	2026-03-30 12:41:32.490Z	324.528° 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 LEMUR 2 MONSON, 42839 on other resources

View LEMUR 2 MONSON, 42839 on NASA - NSSDCA Website

View LEMUR 2 MONSON, 42839 on Heavens-Above

View LEMUR 2 MONSON, 42839 on Keep Track

View LEMUR 2 MONSON, 42839 on Celestrak

View LEMUR 2 MONSON, 42839 on Gunter's Space Page

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

LEMUR 2 MONSON, 42839

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 15 hours ago

TLE from 15 hours ago

TLE epoch observation values (Epoch: 2026-03-29T00:16:10.189Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #42 in the year 2017 (2017-07-14 UTC)

LEMUR 2 MONSON Visibility forecast

Co-orbital & Co-planar RSOs

Check out LEMUR 2 MONSON, 42839 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 15 hours ago