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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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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, 0.4 m

Radar Cross Section

0.093 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 LEMUR 2 MONSON
1 42839U 17042Q   26208.48660256  .00017087  00000-0  60680-3 0  9991
2 42839  97.4095  28.8731 0006160 197.2624 162.8407 15.29083658494322

Epoch: 2026-07-27T11:40Z

TLE epoch observation values (Epoch: 2026-07-27T11:40:42.461Z)

Latitude

-0.00006°

Longitude

-91.4733°

Altitude

485.69 km

Speed

7.62 km/s

True Right ascension

01h 55m 29s

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

14:24:47

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

479.726 km

Perigee altitude

471.282 km

Semi-major axis

6,853.641 km

Eccentricity

0.00062

Inclination

97.4095°

RAAN

28.8731°

Arg. of periapsis

197.2624°

True anomaly

162.86151°

Mean anomaly

162.8407°

Eccentric anomaly

162.85111°

Mean motion

3.82526 °/min

Orbital period

94.11 mins

BSTAR

0.0006068

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

FLOCK 2K 04, 42851 (Decayed)

FLOCK 2K 36, 42876 (Decayed)

FLOCK 2K 35, 42877 (Decayed)

FLOCK 2K 08, 42863 (Decayed)

OBJECT F, 42830 (Decayed)

FLOCK 2K 24, 42857 (Decayed)

FLOCK 2K 15, 42890 (Decayed)

FLOCK 2K 46, 42858 (Decayed)

FLOCK 2K 41, 42875 (Decayed)

FLOCK 2K 44, 42873 (Decayed)

FLOCK 2K 21, 42860 (Decayed)

FLOCK 2K 39, 42866 (Decayed)

FLOCK 2K 11, 42894 (Decayed)

FLOCK 2K 27, 42882 (Decayed)

FLOCK 2K 25, 42884 (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.
4 mins	2026-07-28 11:23:23.847Z	112.56° SE	2026-07-28 11:25:23.847Z	69.661° E	20.71°	2026-07-28 11:27:23.847Z	27.282° NE
4 mins	2026-07-29 00:23:23.847Z	55.552° ENE	2026-07-29 00:25:23.847Z	112.287° ESE	24.469°	2026-07-29 00:27:23.847Z	152.333° SSE

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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: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-07-27T11:40:42.461Z)

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: 13 hours ago