Astra 1G

{{Short description|Astra communications satellite}}

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

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

{{Infobox spaceflight

| name = Astra 1G

| names_list =

| image =

| image_caption =

| image_size = 300px

| mission_type = Communications

| operator = SES

| COSPAR_ID = 1997-076A

| SATCAT = 25071

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

| mission_duration = Planned: 15 years
Final: {{time interval|2 December 1997|June 2023}}

| spacecraft =

| spacecraft_type = Boeing 601HP

| spacecraft_bus = HS-601HP

| manufacturer = Hughes Space and Communications

| launch_mass = {{cvt|3379|kg}}

| dry_mass =

| dimensions =

| power = 6 kW

| launch_date = 2 December 1997, 23:10:37 UTC

| launch_rocket = Proton-K / DM-2M

| launch_site = Baikonur, Site 81/23

| launch_contractor = Khrunichev State Research and Production Space Center

| entered_service = February 1998

| disposal_type = Graveyard orbit

| deactivated = June 2023

| last_contact =

| orbit_reference = Geocentric orbit{{cite web|url=http://www.n2yo.com/satellite/?s=25071|title=ASTRA 1G|publisher=N2YO.com|access-date=7 April 2021}}

| orbit_regime = Geostationary orbit

| orbit_longitude = Astra 19.2° East (1997-2009)
Astra 23.5° East (2009-2010)
Astra 31.5° East (2010-2014)
60° East (2014-2016)
63° East (2016-2017)
51° East (2017-2018)
57° East (2018-2019)
63° East (2019-2021)
Astra 19.2° East (2021-2023)

| apsis = gee

| trans_band = 32 Ku-band

| trans_frequency =

| trans_bandwidth =

| trans_capacity =

| trans_coverage = Europe

| programme = Astra constellation

| previous_mission = Astra 1F

| next_mission = Astra 2A

}}

Astra 1G was one of the Astra communications satellites owned and operated by SES.