Mission typeCommunications
COSPAR ID2011-034A Edit this at Wikidata
SATCAT no.37746
Mission durationPlanned: 8 years
Elapsed: 11 years, 5 months, 14 days
Spacecraft properties
Launch mass1,412 kilograms (3,113 lb)
Dry mass559 kilograms (1,232 lb)[1]
Start of mission
Launch date15 July 2011, 11:18 (2011-07-15UTC11:18Z) UTC
RocketPSLV-XL C17
Launch siteSatish Dhawan SLP
Orbital parameters
Reference systemGeocentric
Longitude48°E (Relocated: 19 Mar 2021.)
83°E (till 9 Feb 2021)
Perigee altitude35,782 kilometres (22,234 mi)
Apogee altitude35,803 kilometres (22,247 mi)
Inclination0.01 degrees
Period23.93 hours
Epoch25 December 2013, 01:49:32 UTC[2]
Band12 Extended C band
← GSAT-8
GSAT-10 →

GSAT-12 is communication satellite designed and developed by the Indian Space Research Organisation. It is the second satellite to be launched and placed on a GTO using PSLV.[3]


GSAT-12 is considered to be a replacement of the aged satellite INSAT-3B. It will provide services like tele-education, tele-medicine, disaster management support and satellite internet access.[4]


GSAT-12 is equipped with 12 Extended C-band transponders.


GSAT-12 was launched onboard PSLV-XL C-17 from second launch pad of Satish Dhawan Space Centre on July 15, 2011.[5] The tentative life of satellite is 8 years.[6][7]

Mission Life and Replacement

GSAT-12 has exceeded its planned mission life and continues to operate. A replacement satellite CMS-01(formerly GSAT-12R) was launched on 17 December 2020.[8]


GSAT-12 has been relocated from 83°E slot to 48°E slot on 19 March 2021.[9]


  1. ^ "UCS Satellite Database". Union of Concerned Scientists. Retrieved 25 December 2013.
  2. ^ Peat, Chris (25 December 2013). "GSAT 12 - Orbit". Heavens Above. Retrieved 25 December 2013.
  3. ^ "GSAT-12/12R". Gunter Space Page. Retrieved 6 October 2020.
  4. ^ "GSAT-12 reaches its home in a circular geo-synchronous orbit". The HIndu. Jul 15, 2011. Retrieved March 20, 2013.
  5. ^ "ISRO successfully launches latest communication satellite GSAT-12". Economic Times. Jul 15, 2011. Retrieved March 20, 2013.
  6. ^ "GSAT-12".
  7. ^ "GSAT-12 powered by PSLV is ready to launch".
  8. ^ "ISRO gearing up for rocket launches with Virtual Launch Control Centre". The Tribune. 5 October 2020.
  9. ^ "Historical satellite position data for GSAT-12 for the month of March 2021". Archived from the original on 2021-03-21. Retrieved 2021-03-21.