EchoStar XXI communications satellite
Separated spacecraft mass:
Approx. 6,900 kg (15,100 lbs.)
Proton Breeze M
705,000 kg (1,554,000 lbs), including payload
58.2 m (191 ft)
June 8, 2017
23:45:47 Reston (June 7)
21:45:47 Denver (June 7)
20:45:47 Palo Alto (June 7)
Baikonur Cosmodrome, Kazakhstan
Launch Pad 24, Launch Complex 81
EchoStar, Englewood, Co.
EchoStar Mobile Limited
SSL, Palo Alto, Ca.
Khrunichev State Research and Production Space Center
Moscow, Russian Federation
Launch Services Provider:
International Launch Services, Reston, Va.
EchoStar XXI is a state-of-the-art S-band satellite designed to
provide mobile connectivity throughout Europe. The spacecraft, based on SSL’s 1300 bus, will be located at the 10.25°East orbital slot. EchoStar subsidiary EchoStar Mobile Limited, an EU-wide licensee for an integrated mobile satellite service network with a complementary ground component, will utilizea portion of the capacity on EchoStar XXI to provision its next-generation, all IP-enabled mobile communications network.
__ S-Band mobile user link and Ka-Band gateway link
__Orbital location: 10.25 degrees East
__Anticipated service life: 15 years
The Proton M launch vehicle, utilizing a 5-burn Breeze M mission design, will lift off from Pad 24 at the Baikonur Cosmodrome in Kazakhstan, with theEchoStar XXI satellite on board. The first three stages of the Proton will use a standard ascent profile to place the orbital unit (Breeze M upper stage and theEchoStar XXI satellite) into a sub-orbital trajectory. From this point in the mission, the Breeze M will perform planned mission maneuvers to advance theorbital unit first to a nearly circular parking orbit, then to an intermediate orbit, followed by a transfer orbit, and finally to a geosynchronous transfer orbit.Separation of the EchoStar XXI satellite is scheduled to occur approximately 9 hours, 13 minutes after liftoff.
Target Orbit at Separation:
Apogee: 35,786 km (22,236 miles)
Perigee: 2271 km (1411 miles)
Inclination: 30.6 degrees
Approximately 9 hours, 13 minutes after liftoff
ILS Mission Statistics:
__94th ILS Proton launch
__412th Proton launch overall
__1st ILS Proton launch of 2017
__6th EchoStar Satellite Launched on ILS Proton
__29th SSL satellite launched on a Proton
ILS ECHOSTAR XXI LIVE LAUNCH BROADCAST
Begins at 11:30 PM ET, June 7L
aunch is at 11:45 pm ET, June 7
Broadcast ends at 12:15 AM ET, June 8
Proton-M launch vehicle puts US satellite into orbit
A Proton-M rocket has launched the US telecom probe EChostar-21 into datum orbit
MOSCOW, June 8. /TASS/. A Proton-M rocket has launched the US telecom probe EChostar-21 into datum orbit, a spokesman for the Roscosmos space corporation informed TASS on Thursday.
"The third-stage vehicle has separated from the space probe," the spokesman said.
The further travel of the space probe to a geo-transitional orbit with the parameters of 36,000 km by 2,300 km will be assisted by five burns of the upper-stage vehicle.
"The delivery of the probe to the datum orbit is likely to take 9 minutes 41 seconds," the spokesman said.
That was the first blast of the Proton-M launch vehicle this year. The previous liftoff of a Proton family vehicle took place on June 9, 2016. The vehicle brought the Intelsat-31 satellite then. Echostar-21 was to be launched soon after but the date was rescheduled time after time and then was postponed after specialists had found a defect in stage two and stage three engines.
Reports said the manufacturer had used a different soldering flux in the production of 71 engines. Although it was more expensive, it still did not meet the general technological requirements.
On the whole, delivery of Echostar-21 to the designated orbit (from the takeoff through to the separation of the space probe from the upper-stage booster) is likely to take 9 hours 13 minutes and will round up at 15:58 Moscow Time. After that the U.S. customer, the U.S. mobile telephony operator EchoStar Corporation, will take over control of the satellite.
The Proton-M launch vehicle blasted off from Baikonur Space Center in Kazakhstan at 06:45 Moscow Time.
Echostar-21 is a powerful geostationary telecom satellite built by Space Systems/Loral. It will support cellular services in Europe.
The satellite weighs 6,871 kg and has an estimated time limit of active existence of fifteen years.