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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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Iframe URL

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: 10 hours ago

TLE from 10 hours ago

0 LEMUR 2 MONSON
1 42839U 17042Q   26034.45823363  .00019412  00000-0  80976-3 0  9999
2 42839  97.3991 216.3163 0007668 104.1284 256.0806 15.23691052467777

Epoch: 2026-02-03T10:59Z

TLE epoch observation values (Epoch: 2026-02-03T10:59:51.385Z)

Latitude

-0°

Longitude

-82.28668°

Altitude

499.086 km

Speed

7.614 km/s

True Right ascension

14h 25m 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

22:52:17

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

496.947 km

Perigee altitude

486.412 km

Semi-major axis

6,869.816 km

Eccentricity

0.00077

Inclination

97.3991°

RAAN

216.3163°

Arg. of periapsis

104.1284°

True anomaly

255.99533°

Mean anomaly

256.0806°

Eccentric anomaly

256.03796°

Mean motion

3.81176 °/min

Orbital period

94.44 mins

BSTAR

0.00080976

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

LEMUR 2 ZACHARY, 42845

NORSAT 2, 42828

CORVUS BC1, 42847

LEMUR 2 PETERG, 42841

LEMUR 2 FURIAUS, 42840

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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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.
5 mins	2026-02-04 00:10:34.875Z	42.342° NE	2026-02-04 00:13:34.875Z	101.733° ESE	21.583°	2026-02-04 00:15:34.875Z	142.618° SSE
5 mins	2026-02-04 12:21:34.875Z	195.75° SSW	2026-02-04 12:23:34.875Z	277.859° WNW	37.373°	2026-02-04 12:26:34.875Z	336.543° 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: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-02-03T10:59:51.385Z)

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: 10 hours ago