View source for Telkom-2

{{Short description|Indonesian communications satellite}}
{{Use British English|date=April 2021}}
{{Use dmy dates|date=April 2021}}
{{Infobox spaceflight
| name              = Telkom-2
| names_list        = 
| image             = 
| image_caption     = 
| image_size        = 300px

| mission_type      = [[Communications satellite|Communications]]
| operator          = [[Telkom Indonesia|PT Telkom]]
| COSPAR_ID         = 2005-046A
| SATCAT            = 28902
| website           = https://www.telkom.co.id/sites
| mission_duration  = 15 years (planned)<br/>{{time interval|16 November 2005|4 June 2021|show=ymd}} (final)

| spacecraft        = Telkom-2<ref name="Ariane">{{cite web|url=https://www.arianespace.com/wp-content/uploads/2017/06/05_nov_16-en.pdf|title=Press Kit|publisher=Arianespace|date=16 November 2005|access-date=28 April 2021}}</ref>
| spacecraft_type   = [[GEOStar-2|Star-2]]
| spacecraft_bus    = [[GEOStar-2]]
| manufacturer      = [[Orbital Sciences Corporation]]
| launch_mass       = {{cvt|1975|kg}}
| dry_mass          = {{cvt|899|kg}}
| dimensions        = 2.4 m x 3.3 m x 1.9 m<br/>Span on orbit: 12.6 m
| power             = 2.918 [[Watt|kW]]

| launch_date       = 16 November 2005,<br/>23:46:00 [[Coordinated Universal Time|UTC]]<ref name="launchlog">{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|publisher=Jonathan's Space Page|date=14 March 2021|access-date=28 April 2021}}</ref>
| launch_rocket     = [[Ariane 5|Ariane 5ECA]] (V167)
| launch_site       = [[Guiana Space Centre|Centre Spatial Guyanais]], [[Kourou]], [[ELA-3]]
| launch_contractor = [[Arianespace]]

| entered_service   = January 2006
| disposal_type     = [[Graveyard orbit]]
| deactivated       = 4 June 2021
| last_contact      =

| orbit_reference   = [[Geocentric orbit]]<ref name="N2YO">{{cite web|url=http://www.n2yo.com/satellite/?s=28902|title=TELKOM 2|publisher=N2YO.com|access-date=28 April 2021}}</ref>
| orbit_regime      = [[Geostationary orbit]]
| orbit_longitude   = 118° East<br/>157° East
| apsis             = gee

| trans_band        = 24 [[C band (IEEE)|C-band]]
| trans_frequency   = 
| trans_bandwidth   = 
| trans_capacity    = 
| trans_coverage    = [[Indonesia]], [[Southeast Asia]], [[Indian subcontinent]]

| programme         = [[Palapa|Palapa constellation]]
| previous_mission  = [[Telkom-1]]
| next_mission      = [[Telkom-3]]
}}

'''Telkom-2''' was a [[geosynchronous satellite|geosynchronous communications satellite]] built by [[Orbital Sciences Corporation]] (OSC) for Indonesia's state-owned telecommunications company, [[Telkom Indonesia|PT Telekomunikasi Indonesia Tbk]] (PT Telkom). Telkom-2 was successfully launched on 16 November 2005, at 23:46:00 [[Coordinated Universal Time|UTC]] and positioned in [[geostationary orbit]], at 118° East for replaced [[Palapa-B4]].

== History ==
Based on Orbital's highly successful and flight-proven [[GEOStar-2|STAR-2]] [[satellite bus]], Telkom-2 featured state-of-the-art [[communications satellite]] technology, and 24 [[C band (IEEE)|C-band]] [[Transponder (satellite communications)|transponders]]. The new spacecraft replaced PT Telkom's on-orbit Palapa-B4 satellite, improved communications coverage across [[Indonesia]], and allowed PT Telkom to expand its [[Coverage (telecommunication)|coverage]] area into [[southeast Asia]] and the [[Indian subcontinent]]. Orbital also supplemented Telkom's existing [[ground station]], and offered extensive [[Mission control center|mission operations]] support. There were several postponements prior to Telkom-2's launch. Three launch delays happened in November 2005 due to technical problems with the [[Ariane 5]] [[launch vehicle]]. Multiple delayed took place between November 2004 and October 2005 due to different problems including technical problems with the satellite. Orbital's contract with PT Telkom included an optional order for another geostationary satellite. Telkom-2 was finally launched on 16 November 2005.

Telkom-2 successfully operated for 15 years. The satellite was retired and placed into a [[graveyard orbit]] in June 2021.<ref>{{cite web |url=https://www.telkomsat.co.id/id/berita/telkomsat-adakan-kick-off-de-orbit-satelit-telkom-2-242 |title=Telkomsat Adakan Kick Off De-Orbit Satelit Telkom-2 |work=[[Telkom Indonesia]] |date=1 June 2021 |access-date=7 July 2021 |language=id}}</ref><ref>{{cite tweet |last=McDowell |first=Jonathan |author-link=Jonathan McDowell |user=planet4589 |number=1412646647662776326 |title=The Indonesian TELKOM 2 satellite , built by Orbital (now Northrop Grumman) was launched in 2005 to GEO 118E. It appears to have been retired on Jun 4. |date=6 July 2021 |access-date=7 July 2021}}</ref>

Specification of Telkom-2 satellite:
* Owner: PT Telkomunikasi Indonesia Tbk (PT Telkom) 
* Mission: [[C band (IEEE)|C-band]] [[communication]]s for Indonesia 
* Performance: [[Repeater]] - two groups of 15-for-12 linearized [[traveling-wave tube]] assemblies (TWTA)
* [[Transponder (satellite communications)|Transponders]] [[Power (physics)|Power]] - 39 [[watt]]s RF
* Stabilization - [[Three-axis stabilization|three-axis]], zero momentum
* Redundancy: Full dual string
* [[Solar arrays]]: 2 panel wings with improved triple-junction [[Gallium arsenide|GaAs]] cells
* Propulsion: Liquid [[Bipropellant rocket|bi-propellant]] transfer [[orbit]] system; [[monopropellant]] ([[hydrazine]]) on-orbit
* Repeater: Two groups of 15-for-12 linear traveling wave tube assemblies ([[Traveling-wave tube|TWTAs]])
* Antenna: Two 2.0&nbsp;m (6.6&nbsp;ft) dual-griddled shaped-[[Light beam|beam]] reflectors

== Also ==
* Article ''Satelit Telkom-2 telah Diluncurkan'', internet: https://web.archive.org/web/20070623104954/http://pribadi.or.id/diary/2005/11/17/satelit-telkom-2-telah-diluncurkan/

== References ==
{{Portal|Spaceflight}}
{{Reflist|30em}}

== External links ==
* [http://www.lyngsat.com/telkom2.html Telkom-2]
* [http://www.lyngsat.com/telkom1.html Telkom-1]
* [http://www.orbital.com/SatellitesSpace/GEO/TELKOM/index.html Satellites in Space], (orbital.com)

{{Telkom Indonesia}}
{{Orbital launches in 2005}}
{{Indonesian Space Program}}

[[Category:Communications satellites]]
[[Category:Communications in Indonesia]]
[[Category:Satellites of Indonesia]]
[[Category:Communications satellites in geostationary orbit]]
[[Category:Spacecraft launched in 2005]]
[[Category:Satellites using the GEOStar bus]]
[[Category:2005 in Indonesia]]