BD-18, 40748
Orbit data source: Space-Track
BD-18, 40748 is a payload satellite owned by CNSA (CN) in MEO that was launched on Sat, 25 Jul 2015 UTC via a CHANG ZHENG 3B/YZ-1 launch vehicle from the Xichang Space Center, China (XSC). 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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40748 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CN / PRCRelated business
Manufacturer
CAST
Mission
Awaiting activation Defense Navigation
Bus & Motor
BD-3M, Unknown motor
Mass
1,014 kg wet, ~850 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 9.0 m
Radar Cross Section
12.638 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 BD-18
1 40748U 15037A 25258.40323123 -.00000054 00000-0 00000-0 0 9999
2 40748 55.1131 311.4969 0011825 252.5826 107.3521 1.86229048 69005Epoch: 2025-09-15T09:40Z
TLE epoch observation values (Epoch: 2025-09-15T09:40:39.178Z)
Latitude
0.00001°
Longitude
171.74252°
Altitude
21,538.433 km
Speed
3.778 km/s
True Right ascension
20h 46m 03s
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
06:09:48
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
21,561.248 km
Perigee altitude
21,495.25 km
Semi-major axis
27,906.386 km
Eccentricity
0.00118
Inclination
55.1131°
RAAN
311.4969°
Arg. of periapsis
252.5826°
True anomaly
107.48138°
Mean anomaly
107.3521°
Eccentric anomaly
107.41675°
Mean motion
0.46557 °/min
Orbital period
773.24 mins
BSTAR
0
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Other satellites on launch #37 in the year 2015 (2015-07-25 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.BD-18 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. |
|---|---|---|---|---|---|---|---|
| 313 mins | 2025-09-16 13:40:17.342Z | 311.762° NW | 2025-09-16 16:18:17.342Z | 270.525° WNW | 39.661° | 2025-09-16 18:53:17.342Z | 206.279° SW |
| 220 mins | 2025-09-17 00:11:17.342Z | 116.678° SE | 2025-09-17 02:04:17.342Z | 71.593° E | 27.561° | 2025-09-17 03:51:17.342Z | 37.546° NE |
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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