SES-11

{{Short description|Geostationary communications satellite}}

{{Use British English|date=June 2020}}

{{Use dmy dates|date=June 2020}}

{{Infobox spaceflight

| name = SES-11 / EchoStar 105

| names_list = EchoStar 105

| image = ECHOSTAR_105-SES-11_MISSION_(37388002170).jpg

| image_caption = Launch of SES-11

| image_size = 300px

| mission_type = Communications

| operator = SES / EchoStar

| COSPAR_ID = 2017-063A

| SATCAT = 42967

| website = https://www.ses.com/

| mission_duration = 15 years (planned)
{{time interval|30 March 2017|show=ymd|sep=,}} (elapsed)

| spacecraft = SES-11 / EchoStar 105

| spacecraft_type = Eurostar

| spacecraft_bus = Eurostar-3000

| manufacturer = Airbus Defence and Space

| launch_mass = {{cvt|5400|kg}}{{cite web |title=SES 11 |url=https://www.satbeams.com/satellites?norad=42967 |website=SatBeams |access-date=25 June 2021}}{{cite web |title=EchoStar 105 Satellite To Replace AMC-15 |url=https://ir.echostar.com/news-releases/news-release-details/echostar-105-satellite-replace-amc-15 |website=Echostar |access-date=25 June 2021}}

| dry_mass =

| dimensions =

| power = 12 kW

| launch_date = 11 October 2017, 22:53:00 UTC

| launch_rocket = Falcon 9 Full Thrust (s/n B1031.2)

| launch_site = Kennedy Space Center, LC-39A

| launch_contractor = SpaceX

| entered_service = 29 November 2017

| disposal_type =

| deactivated =

| last_contact =

| orbit_reference = Geocentric orbit

| orbit_regime = Geostationary orbit

| orbit_longitude = 105° West

| apsis = gee

| trans_band = 48 transponders:
24 C-band
24 Ku-band

| trans_frequency =

| trans_bandwidth = 36 MHz

| trans_capacity =

| trans_coverage = Hawaii, North America, Latin America, Caribbean

| programme = SES constellation

| previous_mission = SES-10

| next_mission = SES-12

}}

SES-11 / EchoStar 105 is a geostationary communications satellite operated by SES and EchoStar and designed and manufactured by Airbus Defence and Space. It has a mass of {{cvt|5200|kg}} and has a design life of at least 15 years.{{cite web|url=https://space.skyrocket.de/doc_sdat/echostar-105-ses-11.htm|title=EchoStar 105 / SES 11 |publisher=Gunter's Space Page|date=11 December 2017|access-date=13 April 2021}}

The spacecraft had been ready to beam television programming and video services across the Americas for SES and EchoStar. The Falcon 9 launch vehicle has placed the satellite into a high-altitude supersynchronous transfer orbit.{{cite web|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2017-063A |title=Display: SES-11 / Echostar 105 2017-063A|publisher=NASA|date=5 April 2021|access-date=13 April 2021}} {{PD-notice}}