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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42839 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
Spire/Glasgow
Mission
Operational Commercial Com/MetRO
Bus & Motor
CUBESAT 3U, Unknown motor
Mass
4 kg wet, 4 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box, 0.5 m
Radar Cross Section
0.093 m², Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 23 hours ago
TLE from 23 hours ago
0 LEMUR 2 MONSON
1 42839U 17042Q 25338.99118641 .00026119 00000-0 11663-2 0 9998
2 42839 97.3964 156.7823 0007024 330.5887 29.4953 15.21315602458572Epoch: 2025-12-04T23:47Z
TLE epoch observation values (Epoch: 2025-12-04T23:47:18.505Z)
Latitude
-0.00002°
Longitude
85.91551°
Altitude
500.757 km
Speed
7.616 km/s
True Right ascension
10h 27m 07s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
20:38:04
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
503.665 km
Perigee altitude
494.005 km
Semi-major axis
6,876.972 km
Eccentricity
0.0007
Inclination
97.3964°
RAAN
156.7823°
Arg. of periapsis
330.5887°
True anomaly
29.53496°
Mean anomaly
29.4953°
Eccentric anomaly
29.51513°
Mean motion
3.80581 °/min
Orbital period
94.59 mins
BSTAR
0.0011663
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Other satellites on launch #42 in the year 2017 (2017-07-14 UTC)
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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.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 | 2025-12-06 00:02:38.301Z | 49.564° ENE | 2025-12-06 00:04:38.301Z | 83.6° E | 17.838° | 2025-12-06 00:07:38.301Z | 139.64° SSE |
| 4 mins | 2025-12-06 01:37:38.301Z | 320.027° NNW | 2025-12-06 01:38:38.301Z | 295.597° NW | 22.675° | 2025-12-06 01:41:38.301Z | 236.031° WSW |
| 6 mins | 2025-12-06 12:13:38.301Z | 179.2° S | 2025-12-06 12:16:38.301Z | 303.367° NW | 40.381° | 2025-12-06 12:19:38.301Z | 341.952° N |
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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