Galaxy 27

{{Short description|Communications satellite}}

{{Use American English|date=April 2021}}

{{Use dmy dates|date=April 2021}}

{{Infobox spaceflight

| name = Galaxy 27

| names_list = G-27
Telstar 7
Intelsat Americas 7
IA-7

| image =

| image_caption =

| image_size = 300px

| mission_type = Communications

| operator = Intelsat

| COSPAR_ID = 1999-052A

| SATCAT = 25922

| website = http://www.intelsat.com

| mission_duration = 12 years (planned)
{{time interval|25 September 1999|show=ymd|sep=,}} (elapsed)

| spacecraft =

| spacecraft_type = Galaxy

| spacecraft_bus = LS-1300

| manufacturer = Space Systems/Loral

| launch_mass = {{cvt|3790|kg}}

| dry_mass = {{cvt|1537|kg}}

| dimensions =

| power =

| launch_date = 25 September 1999, 06:29 UTC

| launch_rocket = Ariane 4LP (V121)

| launch_site = Centre Spatial Guyanais, ELA-2

| launch_contractor = Arianespace

| entered_service = November 1999

| disposal_type = Graveyard orbit

| deactivated =

| last_contact =

| orbit_reference = Geocentric orbit

| orbit_regime = Geostationary orbit

| orbit_slot = 66° West

| apsis = gee

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

| trans_frequency =

| trans_bandwidth = 36 MHz

| trans_capacity =

| trans_coverage = North America

| programme = Intelsat constellation

| previous_mission = Galaxy 26

| next_mission = Galaxy 28

}}

Galaxy 27 is a communications satellite owned by Intelsat. It was at first located at 129° West longitude, serving most of the North America market.{{satbeams footprint|5712|Galaxy-27 Ku-band Beam}}{{satbeams footprint|5711|Galaxy-27 C-band Beam}} It was built by Space Systems/Loral, as part of its LS-1300 line. Galaxy 27 was formerly known as Intelsat Americas-7 and Telstar-7.

This satellite experienced a power failure of several days in 2004 and returned to service with reduced capacity.{{cite web|url=https://space.skyrocket.de/doc_sdat/telstar-5.htm|title=Galaxy 27|publisher=Gunter's Space Page|date=11 December 2017|access-date=13 April 2021}}

In May 2011, Galaxy 27 was redeployed to 45.1° East longitude in order to expand Intelsat's services in West Asia.{{cite web|title=Status - Telstar 7|url=https://nextspaceflight.com/launches/details/1091|publisher=nextspaceflight.com|access-date=12 December 2022}} In October 2013, Intelsat moved the satellite to an inclined orbit at 66° East.{{cite web|title=Intelsat 17 66 East Satellite and Digital TV Support forums|publisher=satellites.co.uk|date=October 2, 2013 |url=https://www.satellites.co.uk/forums/threads/intelsat-17-66-east.155145/page-2}} At its inclined orbit of 2.4° at 66° East, Galaxy 27 is in a collocated orbit with Intelsat 17.