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ECHOSTAR 21, 42749

Orbit data source: Space-Track

ECHOSTAR 21, 42749 is a payload satellite owned by Echostar Mobile (US) in GEO that was launched on Thu, 08 Jun 2017 UTC via a PROTON-M/BRIZ-M 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.

Not visible in the next 10 days

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Iframe URL

https://www.satcat.com/sats-embedded/42749?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

42749, 2017-032A

Orbit

GEO

Country

Related business

Echostar Corp (US)

Manufacturer

SS/Loral (MDA)

Mission

Operational Commercial Communications

Bus & Motor

LS-1300, R-4D-11

Mass

6,871 kg wet, ~3,000 kg dry

Launch date (UTC)

2017-06-08 (8 years ago)

Launch vehicle

PROTON-M/BRIZ-M

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan + 1 Dish, 16.2 m

Radar Cross Section

47.415 m², Large (>1 m²)

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Last TLE update: 8 hours ago

TLE from 8 hours ago

0 ECHOSTAR 21
1 42749U 17032A   25260.89906006  .00000046  00000-0  00000-0 0  9992
2 42749   1.9031 338.5473 0002372 203.8658 148.5697  1.00272535 30368

Epoch: 2025-09-17T21:34Z

TLE epoch observation values (Epoch: 2025-09-17T21:34:38.789Z)

Latitude

-0.24842°

Longitude

10.2764°

Altitude

35,794.492 km

Speed

3.074 km/s

True Right ascension

22h 04m 01s

True Declination

0° 14' 53"

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

22:02:44

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,797.455 km

Perigee altitude

35,777.452 km

Semi-major axis

42,165.59 km

Eccentricity

0.00024

Inclination

1.9031°

RAAN

338.5473°

Arg. of periapsis

203.8658°

True anomaly

148.58387°

Mean anomaly

148.5697°

Eccentric anomaly

148.57679°

Mean motion

0.25067 °/min

Orbital period

1,436.14 mins

BSTAR

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Other satellites on launch #32 in the year 2017 (2017-06-08 UTC)

BREEZE-M R/B, 42750

BREEZE-M DEB (TANK), 42751

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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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ECHOSTAR 21 Visibility

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ECHOSTAR 21 is likely not visible in the next few days.

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42749 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

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

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Check out ECHOSTAR 21, 42749 on other resources

View ECHOSTAR 21, 42749 on NASA - NSSDCA Website

View ECHOSTAR 21, 42749 on Heavens-Above

View ECHOSTAR 21, 42749 on Keep Track

View ECHOSTAR 21, 42749 on Celestrak

View ECHOSTAR 21, 42749 on Gunter's Space Page

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

ECHOSTAR 21, 42749

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2025-09-17T21:34:38.789Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #32 in the year 2017 (2017-06-08 UTC)

ECHOSTAR 21 Visibility

42749 neighbors

Co-orbital & Co-planar RSOs

Check out ECHOSTAR 21, 42749 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago