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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: 21 hours ago

TLE from 21 hours ago

0 LEMUR 2 MONSON
1 42839U 17042Q   26255.45562065  .00011647  00000-0  40066-3 0  9991
2 42839  97.4118  75.6954 0007293  52.1648 308.0252 15.30204579501508

Epoch: 2026-09-12T10:56Z

TLE epoch observation values (Epoch: 2026-09-12T10:56:05.624Z)

Latitude

0.00003°

Longitude

-79.79241°

Altitude

475.228 km

Speed

7.63 km/s

True Right ascension

05h 02m 46s

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

00:11:40

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

477.15 km

Perigee altitude

467.158 km

Semi-major axis

6,850.291 km

Eccentricity

0.00073

Inclination

97.4118°

RAAN

75.6954°

Arg. of periapsis

52.1648°

True anomaly

307.95933°

Mean anomaly

308.0252°

Eccentric anomaly

307.99227°

Mean motion

3.82807 °/min

Orbital period

94.04 mins

BSTAR

0.00040066

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

OBJECT C, 42827

FLOCK 2K 37, 42867 (Decayed)

FLOCK 2K 13, 42891 (Decayed)

FLOCK 2K 15, 42890 (Decayed)

LEMUR 2 ZACHARY, 42845

FLOCK 2K 02, 42853 (Decayed)

FLOCK 2K 06, 42897 (Decayed)

FLOCK 2K 03, 42850 (Decayed)

FLOCK 2K 35, 42877 (Decayed)

CORVUS BC2, 42846

LEMUR 2 ANDIS, 42838

OBJECT J, 42833

FLOCK 2K 44, 42873 (Decayed)

FLOCK 2K 47, 42854 (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	2026-09-13 12:09:52.101Z	167.642° S	2026-09-13 12:12:52.101Z	172.656° S	71.807°	2026-09-13 12:15:52.101Z	347.448° N
5 mins	2026-09-14 01:10:52.101Z	356.2° N	2026-09-14 01:12:52.101Z	241.579° WSW	56.835°	2026-09-14 01:15:52.101Z	202.573° SW

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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: 21 hours ago

TLE from 21 hours ago

TLE epoch observation values (Epoch: 2026-09-12T10:56:05.624Z)

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: 21 hours ago