Showing default

BSAT-4A, 42951

Orbit data source: Space-Track

BSAT-4A, 42951 is a payload satellite owned by BSAT (JP) in GEO that was launched on Fri, 29 Sep 2017 UTC via an ARIANE 5ECA launch vehicle from the French Guiana (FRGUI). 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.

Not visible in the next 10 days

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/42951?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/42951?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

42951, 2017-059B

Orbit

GEO

Country

JP / JPN

Related business

Broadcasting Satellite System Corp. (JP)

Manufacturer

SS/Loral (MDA)

Mission

Operational Commercial Communications

Bus & Motor

LS-1300, R-4D

Mass

3,520 kg wet, ~1,800 kg dry

Launch date (UTC)

2017-09-29 (8 years ago)

Launch vehicle

ARIANE 5ECA

Launch site

French Guiana (FRGUI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 12.3 m

Radar Cross Section

33.343 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 15 hours ago

TLE from 15 hours ago

0 BSAT-4A
1 42951U 17059B   25260.80733932 -.00000371  00000-0  00000-0 0  9995
2 42951   0.0476   3.3463 0001149 106.9883 287.1343  1.00271951 29060

Epoch: 2025-09-17T19:22Z

TLE epoch observation values (Epoch: 2025-09-17T19:22:34.117Z)

Latitude

-0.01252°

Longitude

109.83804°

Altitude

35,784.636 km

Speed

3.075 km/s

True Right ascension

02h 29m 49s

True Declination

0° 00' 45"

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

03:39:16

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,792.464 km

Perigee altitude

35,782.774 km

Semi-major axis

42,165.756 km

Eccentricity

0.00011

Inclination

0.0476°

RAAN

3.3463°

Arg. of periapsis

106.9883°

True anomaly

287.12172°

Mean anomaly

287.1343°

Eccentric anomaly

287.12801°

Mean motion

0.25067 °/min

Orbital period

1,436.15 mins

BSTAR

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

Other satellites on launch #59 in the year 2017 (2017-09-29 UTC)

INTELSAT 37E, 42950

ARIANE 5 R/B, 42952

ARIANE 5 DEB (SYLDA), 42953 (Decayed)

Did you know?

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

Click here to try in Sandbox

BSAT-4A Visibility

Loading observer location...
Set Observer location

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.
BSAT-4A is likely not visible in the next few days.

Loading historical data...

42951 neighbors

Authenticating...

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

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

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

Authenticating...

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

Check out BSAT-4A, 42951 on other resources

View BSAT-4A, 42951 on NASA - NSSDCA Website

View BSAT-4A, 42951 on Heavens-Above

View BSAT-4A, 42951 on Keep Track

View BSAT-4A, 42951 on Celestrak

View BSAT-4A, 42951 on Gunter's Space Page

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

BSAT-4A, 42951

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 15 hours ago

TLE from 15 hours ago

TLE epoch observation values (Epoch: 2025-09-17T19:22:34.117Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #59 in the year 2017 (2017-09-29 UTC)

BSAT-4A Visibility

42951 neighbors

Co-orbital & Co-planar RSOs

Check out BSAT-4A, 42951 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 15 hours ago