LDPE-1, 49818
Orbit data source: Space-Track
LDPE-1, 49818 is a payload satellite owned by AFRL/RV (US) in GEO that was launched on Tue, 07 Dec 2021 UTC via an ATLAS V 551 launch vehicle from the Air Force Eastern Test Range (AFETR). 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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49818 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
NGIS
Mission
Operational Defense Technology
Bus & Motor
ESPASTAR, Unknown motor
Mass
~500 kg wet, 500 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl + 1 Pan, 1.8 m
Radar Cross Section
3.054 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 6 hours ago
TLE from 6 hours ago
0 LDPE-1
1 49818U 21118B 25291.95252983 -.00000297 00000-0 00000-0 0 9994
2 49818 3.1319 81.9419 0001281 286.7474 98.9402 1.01507073 14226Epoch: 2025-10-18T22:51Z
TLE epoch observation values (Epoch: 2025-10-18T22:51:38.577Z)
Latitude
1.33629°
Longitude
96.99987°
Altitude
35,443.963 km
Speed
3.087 km/s
True Right ascension
07h 10m 20s
True Declination
1° 20' 06"
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
23:54:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
35,450.247 km
Perigee altitude
35,439.532 km
Semi-major axis
41,823.027 km
Eccentricity
0.00013
Inclination
3.1319°
RAAN
81.9419°
Arg. of periapsis
286.7474°
True anomaly
98.9547°
Mean anomaly
98.9402°
Eccentric anomaly
98.94745°
Mean motion
0.25376 °/min
Orbital period
1,418.67 mins
BSTAR
0
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Other satellites on launch #118 in the year 2021 (2021-12-07 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.LDPE-1 Visibility
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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. |
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| LDPE-1 is likely not visible in the next few days. |
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49818 neighbors
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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
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in ascending order |
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