Intelsat V F-9

{{Short description|Failed communications satellite}}

{{Infobox spaceflight

| name = Intelsat V F-9 → Intelsat 509

| image =

| image_caption =

| mission_type = Communication

| operator = Intelsat

| website =

| COSPAR_ID = 1984-057A{{cite web|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1984-057A|title=INTELSAT 5 F-9|publisher=National Space Science Data Center|access-date=April 23, 2017}}

| SATCAT = 14077

| mission_duration = 7 years (planned)
Launch failure

| spacecraft_bus = Intelsat-V bus

| manufacturer = Ford Aerospace

| BOL_mass = {{convert|1012|kg|lb}}{{cite web|url=http://space.skyrocket.de/doc_sdat/intelsat-5.htm|title=Intelsat-5|publisher=Gunter's Space Page|access-date=April 23, 2017}}

| launch_mass = {{convert|1928.2|kg|lb}}

| power =

| launch_date = {{start-date|June 9, 1984, 23:03|timezone=yes}} UTC{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|work=Jonathan's Space Page|access-date=April 23, 2017}}

| launch_rocket = Atlas G

| launch_site = Cape Canaveral LC-36B

| launch_contractor =

| entered_service =

| disposal_type =

| deactivated =

| orbit_epoch = Planned

| orbit_reference = Geocentric

| orbit_regime = Geostationary

| apsis = gee

| trans_band =

| trans_frequency =

| trans_capacity =

| trans_coverage =

| trans_TWTA =

| trans_EIRP =

| trans_HPBW =

| programme = Intelsat V

| previous_mission = Intelsat V F-8

| next_mission = Intelsat VA F-10

}}

Intelsat 509, previously named Intelsat V F-9, was a communications satellite operated by Intelsat. Launched in 1984, it was the ninth of fifteen Intelsat V satellites to be launched. The Intelsat V series was constructed by Ford Aerospace, based on the Intelsat-V satellite bus. Intelsat V F-9 was part of an advanced series of satellites designed to provide greater telecommunications capacity for Intelsat's global network. He also carried a Maritime Communications Services (MCS) package for Inmarsat. However, the launch vehicle failed to put the satellite into a useful orbit.

The satellite launch took place on June 9, 1984, at 23:03 UTC, by means of an Atlas-Centaur G-D1AR vehicle from the Cape Canaveral Air Force Station, Florida, United States. It had a launch mass of 1,928 kg.{{cite web|url=http://www.tbs-satellite.com/tse/online/sat_intelsat_509.html|title=INTELSAT 509|publisher=TSE|access-date=April 23, 2017}} The Intelsat 509 was equipped with 4 Ku-band transponders more 21 C-band transponders for 12,000 audio circuits and 2 TV channels.