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BD-19, 40749

Orbit data source: Space-Track

BD-19, 40749 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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<iframe src="https://www.satcat.com/sats-embedded/40749?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/40749?theme=dark&initialShowStats=false

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Identifier

40749, 2015-037B

Orbit

MEO

Country

CN / PRC

Related business

China National Space Administration (CN)

Manufacturer

CAST

Mission

Awaiting activation Defense Navigation

Bus & Motor

BD-3M, Unknown motor

Mass

1,014 kg wet, ~850 kg dry

Launch date (UTC)

2015-07-25 (10 years ago)

Launch vehicle

CHANG ZHENG 3B/YZ-1

Launch site

Xichang Space Center, China (XSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 5.0 m

Radar Cross Section

8.984 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 3 days ago

TLE from 3 days ago

0 BD-19
1 40749U 15037B   25345.62076389 -.00000088  00000-0  00000-0 0  9997
2 40749  55.0364 308.4915 0003441 358.1692   1.8205  1.86253918 70630

Epoch: 2025-12-11T14:53Z

TLE epoch observation values (Epoch: 2025-12-11T14:53:54.000Z)

Latitude

-0.00004°

Longitude

4.42511°

Altitude

21,516.451 km

Speed

3.781 km/s

True Right ascension

20h 33m 53s

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

19:32:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

21,535.369 km

Perigee altitude

21,516.166 km

Semi-major axis

27,903.905 km

Eccentricity

0.00034

Inclination

55.0364°

RAAN

308.4915°

Arg. of periapsis

358.1692°

True anomaly

1.82175°

Mean anomaly

1.8205°

Eccentric anomaly

1.82113°

Mean motion

0.46564 °/min

Orbital period

773.14 mins

BSTAR

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Computing Atmospheric mass density...

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Other satellites on launch #37 in the year 2015 (2015-07-25 UTC)

YZ-1 R/B, 40751

CZ-3B R/B, 40750

BD-18, 40748

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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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BD-19 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.
210 mins	2025-12-14 20:58:18.188Z	125.235° SE	2025-12-14 21:48:18.188Z	90.406° ESE	40.033°	2025-12-15 00:28:18.188Z	49.067° ENE
8 mins	2025-12-15 13:24:18.188Z	310.074° NW	2025-12-15 13:28:18.188Z	308.598° NW	10.042°	2025-12-15 13:32:18.188Z	307.114° NW
10 mins	2025-12-15 20:48:18.188Z	183.624° SSW	2025-12-15 20:58:18.188Z	183.094° SSW	14.023°	2025-12-15 20:58:18.188Z	183.094° SSW

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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 BD-19, 40749 on other resources

View BD-19, 40749 on NASA - NSSDCA Website

View BD-19, 40749 on Heavens-Above

View BD-19, 40749 on Keep Track

View BD-19, 40749 on Celestrak

View BD-19, 40749 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

BD-19, 40749

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2025-12-11T14:53:54.000Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #37 in the year 2015 (2015-07-25 UTC)

BD-19 Visibility forecast

Co-orbital & Co-planar RSOs

Check out BD-19, 40749 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago