Star One C3

{{Use dmy dates|date=August 2023}}

{{Short description|Communications satellite}}

{{Infobox spaceflight

| name = Star One C3

| image =

| image_caption =

| mission_type = Communication

| operator = Star One

| website =

| COSPAR_ID = 2012-062A

| SATCAT = 38991

| mission_duration = 15 years (planned)

| spacecraft_bus = STAR-2

| manufacturer = Orbital Sciences Corporation

| dry_mass =

| launch_mass = {{convert|3227|kg|lb}}

| power =

| launch_date = {{start-date|10 November 2012, 21:05|timezone=yes}} UTC

| launch_rocket = Ariane 5ECA

| launch_site = Kourou ELA-3

| launch_contractor = Arianespace

| entered_service =

| disposal_type =

| deactivated =

| orbit_epoch =

| orbit_reference = Geocentric

| orbit_regime = Geostationary

| orbit_semimajor = {{convert|42164.0|km|mi}}

| orbit_periapsis = {{convert|35787.6|km|mi}}

| orbit_apoapsis = {{convert|35799.5|km|mi}}

| orbit_inclination =

| orbit_period = 1,436.1 minutes

| orbit_longitude = 75° and 84° west

| orbit_slot =

| apsis = gee

| trans_band = {{nowrap|28 IEEE C-band (NATO G/H-band)}}
16 IEEE {{Ku band}} (NATO J-band)

| trans_frequency =

| trans_bandwidth =

| trans_capacity =

| trans_coverage =

| trans_TWTA =

| trans_EIRP =

| trans_HPBW =

}}

Star One C3 is a communications satellite operated by Star One, a subsidiary of Embratel. It was built by Orbital Sciences Corporation based on the STAR-2 satellite bus, and was launched on 10 November 2012 21:05 UTC by an Ariane 5ECA carrier rocket, as part of a dual-payload launch with Eutelsat 21B.{{Cite web |date=2012-11-11 |title=Arianespace - Mission Update - Ariane 5 is poised for Arianespace's launch with the EUTELSAT 21B and Star One C3 satellites |url=http://www.arianespace.com/news-mission-update/2012/974.asp |access-date=2023-05-20 |archive-url=https://web.archive.org/web/20121111013359/http://www.arianespace.com/news-mission-update/2012/974.asp |archive-date=2012-11-11 }}

Star One C3 will replace Brasilsat B3 in the 75° W position. The launch mass was 3226.6 kg.{{Cite web |date=Nov 2012 |title=Ariane 5 Data Relating to Flight 210 |last=Sander|first=Catherine|url=http://www.astrium.eads.net/media/document/ariane_5_flight_210.pdf |pages=24-25 |access-date=2023-08-08 |lang=en |archive-url=https://web.archive.org/web/20131216004318/http://www.astrium.eads.net/media/document/ariane_5_flight_210.pdf |url-status=unfit |publisher=Astrium |archive-date=2013-12-16 }}