NSS-9

{{Short description|Communications satellite}}

{{Infobox spaceflight

| name = NSS-9

| image =

| image_caption =

| mission_type = Communications

| operator = {{Unbulleted list|SES New Skies (2009)|SES World Skies (2009-2011)|SES (2011-present)}}

| website =

| COSPAR_ID = 2009-008A

| SATCAT = 33749

| mission_duration = 15 years

| spacecraft_bus = GEOStar-2

| manufacturer = Orbital Sciences

| launch_mass = {{convert|2230|kg|lb}}

| power = 2,300 watts

| launch_date = {{start-date|12 February 2009, 22:09|timezone=yes}} UTC

| launch_rocket = Ariane 5ECA V187

| launch_site = Kourou ELA-3

| launch_contractor = Arianespace

| entered_service =

| disposal_type =

| deactivated =

| orbit_epoch = 29 October 2013, 13:27:57 UTC{{cite web|url=http://www.n2yo.com/satellite/?s=33749|title=NSS 9 Satellite details 2009-008A NORAD 33749|work=N2YO|date=29 October 2013|access-date=29 October 2013}}

| orbit_reference = Geocentric

| orbit_regime = Geostationary

| orbit_periapsis = {{convert|35783|km|mi}}

| orbit_apoapsis = {{convert|35801|km|mi}}

| orbit_inclination = 0.01 degrees

| orbit_period = 23.93 hours

| orbit_longitude = 177° west

| apsis = gee

| trans_band =

| trans_frequency =

| trans_bandwidth =

| trans_capacity =

| trans_coverage =

| trans_TWTA =

| trans_EIRP =

| trans_HPBW =

}}

NSS-9 is a communications satellite owned by SES World Skies. It is an all C-band satellite intended as a replacement for NSS-5, and has three beams with 44 active C-band transponders.

NSS-9 was built by Orbital Sciences Corporation and launched February 12, 2009 aboard Ariane 5 flight V-187.{{cite web |url=http://www.ses-newskies.com/nss9satdata.htm |title=Satellite Data - NSS-9 |publisher=SES NEW SKIES |url-status=dead |archive-url=https://web.archive.org/web/20090225035200/http://ses-newskies.com/nss9satdata.htm |archive-date=2009-02-25 }}{{cite web |url=http://www.arianespace.com/news-mission-update/2009/571.asp |title=Ariane 5 begins 2009 with another successful launch at Arianespace's service |publisher=Arianespace}}

Built on the Orbital STAR-2 satellite bus,{{cite web|title=Orbital-Built NSS-9 Communications Satellite Successfully Launched For SES NEW SKIES|date=February 13, 2009|url=https://news.northropgrumman.com/news/releases/orbital-built-nss-9-communications-satellite-successfully-launched-for-ses-new-skies|publisher=Northrop Grumman|access-date=March 11, 2023}} NSS-9 has an expected useful lifetime extending through 2024.{{cite web|last=Krebs|first=Gunter D. |title=NSS 9|publisher=Gunter's Space Page|access-date=March 11, 2023|url=https://space.skyrocket.de/doc_sdat/nss-9.htm}}

Its launch has been featured in National Geographic Channel's programme World's Toughest Fixes Satellite Launch S02E01.{{cite web |url=https://www.rottentomatoes.com/tv/worlds_toughest_fixes/s02/e01 |title=World's Toughest Fixes: Satellite Launch s02e01 |publisher=National Geographic Channel|access-date=March 11, 2023}}