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Sirius was a constellation of communications satellites operated at 5.0° East in geostationary orbit (GEO) by NSAB (later SES Sirius, and now a non-autonomous part of SES, owner and operator of the Astra satellites). They carried digital satellite television to the countries of Scandinavia, Baltic states, Eastern Europe and Africa, including the Viasat pay TV system, along with several pay TV packages for Eastern Europe, the TopTV package for Africa, a number of Ukrainian channels and the national Latvian and Lithuanian channel service free-to-air.

Satellites

Sirius 4

A fourth satellite, Sirius 4, was ordered in 2005 and launched at 22:39:47 UTC on 17 November 2007. It carries 52 active Ku-band transponders and two active Ka-band transponders.^[1] Sirius 4 was built by Lockheed Martin Space Systems based upon the A2100AX design.^[2]

Among the services carried are Viasat and Viasat Ukraine which has used the Sirius satellites for their digital platform since its launch.

Sirius 4 was renamed to Astra 4A in June 2010, when the SES took full ownership and control of SES Sirius.^[3]

Sirius 5

Sirius 5 was the original name of the SES-5 satellite. SES-5 that was launched in July 2012 and is now co-located with Astra 4A (Sirius 4) at 5.0° East. This satellite provides a similar European and African coverage as Astra 4A. When ordered by the SES Sirius AB of Sweden in October 2008, the name of the satellite was Sirius 5. SES Sirius was acquired by SES in 2010 and the company was named SES Astra (a subsidiary of SES). This led to the satellite being renamed to Astra 4B in 2010. The name was changed to SES-5 in 2011.

Retired satellites

Sirius 1

Sirius 1 (later Sirius W) was purchased from British Sky Broadcasting after Sky Television's merger with British Satellite Broadcasting (BSB) (the merger was conducted on Sky's terms and BSB's satellites were sold in favour of Sky's leased Astra satellite operations). The satellite had previously operated as Marcopolo 1. It operated at 5.0° East from 1994 until 2000, when it was moved to 13.0° West. It operated here before being moved to a graveyard orbit in 2003.

Sirius 2

Sirius 2 was manufactured by Aérospatiale and launched from Kourou on 12 November 1997 to replace the Tele-X satellite. It is of the model Spacebus 3000B2 and has 32 K_u-band transponders with beams targeting both the Nordic region and all of Europe.

It was moved to 31.5° East (0°00′N 31°30′E / 0°N 31.5°E / 0; 31.5) and renamed Astra 5A on 29 April 2008. The Astra 5A satellite mission ended on 16 January 2009 due to an abnormal condition with the spacecraft.^[4]

Sirius 3

Sirius 3 was stationed at 51.2° East at the end if its lifetime (0°00′N 51°12′E / 0°N 51.2°E / 0; 51.2) in an inclined orbit.^[5] Sirius 3 was leased to SES immediately after its launch on 5 October 1998 for a period of 12 months (after which it was moved to its original destination of 5.0° East) to provide capacity at 28.2° East and to back up Astra 2A, pending the launch of Astra 2B on 14 September 2000.^[6] Satellite was retired in 2015 and moved to a graveyard orbit.^[7]

Sirius Satellite Radio

The Sirius satellites are not the satellites used for the American Sirius Satellite Radio service, whose satellites are named Radiosat 1-4 due to being launched after the Sirius fleet of satellites.

References

^ "ILS Proton to Launch SES' Sirius 4". ILS Launch. 9 November 2007. Archived from the original on 13 November 2007.
^ "Sirius-4 Specifications". Khrunichev. Archived from the original on 2 December 2007.
^ "SES SIRIUS BECOMES SES ASTRA" (Press release). SES Astra. 22 June 2010. Retrieved 26 January 2012.
^ "SES ASTRA Announces End Of ASTRA 5A Spacecraft Mission" (Press release). SES Astra. 16 January 2009. Retrieved 26 January 2012.
^ Sirius 3 at 51.2°E, Lyngsat, archived from the original on 15 November 2012, retrieved 24 November 2012
^ "Astra 2A ready for commercial operations at 28.2° East. Astra 1D to be relocated to 19.2° East" (Press release). SES Astra. 15 January 1998.
^ "Sirius 3".

External links

Map all coordinates using OpenStreetMap

Download coordinates as:

Sirius 1 info from Swedish Space Corporation Archived 2 August 2009 at the Wayback Machine
Sirius 2 info from Swedish Space Corporation Archived 2 August 2009 at the Wayback Machine
Sirius 3 info from Swedish Space Corporation Archived 2 August 2009 at the Wayback Machine
Sirius footprint(s) at SatBeams
SES - Official SES site
SES fleet information

[1] "ILS Proton to Launch SES' Sirius 4". ILS Launch. 9 November 2007. Archived from the original on 13 November 2007.

[2] "Sirius-4 Specifications". Khrunichev. Archived from the original on 2 December 2007.

[3] "SES SIRIUS BECOMES SES ASTRA" (Press release). SES Astra. 22 June 2010. Retrieved 26 January 2012.

[4] "SES ASTRA Announces End Of ASTRA 5A Spacecraft Mission" (Press release). SES Astra. 16 January 2009. Retrieved 26 January 2012.

[5] Sirius 3 at 51.2°E, Lyngsat, archived from the original on 15 November 2012, retrieved 24 November 2012

[6] "Astra 2A ready for commercial operations at 28.2° East. Astra 1D to be relocated to 19.2° East" (Press release). SES Astra. 15 January 1998.

[7] "Sirius 3".

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+{{Short description|Set of telecommunications satellites}}
 {{distinguish|Sirius Satellite Radio}}
+{{Use British English|date=June 2020}}
-'''Sirius''' was a constellation of [[communications satellite]]s operated at [[Astra 5°E|5°E]] in [[geostationary orbit]] (GEO) by [[NSAB]] (later [[SES Sirius]], and now a non-autonomous part of [[SES S.A.|SES]], owner and operator of the [[Astra (satellites)|Astra]] satellites). They carried [[digital television|digital]] [[satellite television]] to the countries of [[Scandinavia]], [[Baltic states]], eastern Europe and Africa,  including the [[Viasat]] [[pay TV]] system, along with several pay TV packages for eastern Europe, the [[TopTV]] package for Africa, a number of [[Ukraine|Ukrainian]] channels and the national [[Latvia]]n and [[Lithuania]]n channel service [[free-to-air]].
+{{Use dmy dates|date=June 2020}}
+'''Sirius''' was a constellation of [[communications satellite]]s operated at [[Astra 5°E|5.0° East]] in [[geostationary orbit]] (GEO) by [[SES Sirius|NSAB]] (later [[SES Sirius]], and now a non-autonomous part of [[SES (company)|SES]], owner and operator of the [[Astra (satellites)|Astra satellites]]). They carried [[Digital television|digital]] [[satellite television]] to the countries of [[Scandinavia]], [[Baltic states]], [[Eastern Europe]] and [[Africa]], including the [[Viasat (Nordic television service)|Viasat]] [[Pay television|pay TV]] system, along with several pay TV packages for Eastern Europe, the [[StarSat|TopTV]] package for Africa, a number of [[Ukraine|Ukrainian]] channels and the national [[Latvia|Latvian]] and [[Lithuania|Lithuanian]] channel service [[free-to-air]].
 == Satellites ==
-===Sirius 4===
+=== Sirius 4 ===
-A fourth satellite, Sirius 4, was ordered in 2005 and launched at 22:39:47 on 17 November 2007. It carries 52 active Ku-band [[transponder]]s and two active Ka-band transponders.<ref>{{cite web | url = http://www.ilslaunch.com/zmedia/newsarchives/newsreleases/rec203/ | title = ILS Proton to Launch SES' Sirius 4 | publisher = ILS | date = November 9, 2007 | url-status = dead | archiveurl = https://web.archive.org/web/20071113195714/http://www.ilslaunch.com/zmedia/newsarchives/newsreleases/rec203/ | archivedate = November 13, 2007 }}</ref> Sirius 4 was built by [[Lockheed Martin Space Systems]] based upon the [[A2100AX]] design.<ref>
+A fourth satellite, Sirius 4, was ordered in 2005 and launched at 22:39:47 UTC on 17 November 2007. It carries 52 active [[Ku band|Ku-band]] [[transponder]]s and two active [[Ka band|Ka-band]] transponders.<ref>{{cite web|url=http://www.ilslaunch.com/zmedia/newsarchives/newsreleases/rec203/|title=ILS Proton to Launch SES' Sirius 4|publisher=ILS Launch|date=November 9, 2007|url-status=dead |archiveurl=https://web.archive.org/web/20071113195714/http://www.ilslaunch.com/zmedia/newsarchives/newsreleases/rec203/|archive-date=November 13, 2007}}</ref> Sirius 4 was built by [[Lockheed Martin Space Systems]] based upon the [[Lockheed Martin A2100|A2100AX]] design.<ref>{{cite web|url=http://coopi.khrunichev.ru/eng/pl_pusk.htm|title=Sirius-4 Specifications|publisher=Khrunichev|url-status=dead |archiveurl=https://web.archive.org/web/20071202001035/http://coopi.khrunichev.ru/eng/pl_pusk.htm|archive-date=2007-12-02}}</ref>
-{{cite web | url = http://coopi.khrunichev.ru/eng/pl_pusk.htm | title = Sirius-4 Specifications | publisher = Khrunichev | url-status = dead | archiveurl = https://web.archive.org/web/20071202001035/http://coopi.khrunichev.ru/eng/pl_pusk.htm | archivedate = 2007-12-02 }}</ref>
-Among the services carried are [[Viasat]] and [[Viasat Ukraine]] which has used the Sirius satellites for their digital platform since its launch.
+Among the services carried are [[Viasat (Nordic television service)|Viasat]] and [[Viasat Ukraine]] which has used the Sirius satellites for their digital platform since its launch.
-Sirius 4 was renamed to [[Astra 4A]] in June 2010, when the SES took full ownership and control of SES Sirius.<ref>{{cite press release |publisher=SES Astra |date=June 22, 2010 |url=http://www.ses.com/4233325/news/2010/4489346|title= SES SIRIUS BECOMES SES ASTRA |accessdate = January 26, 2012}}</ref>
+Sirius 4 was renamed to [[Astra 4A]] in June 2010, when the SES took full ownership and control of [[SES Sirius]].<ref>{{cite press release|publisher=SES Astra|date=June 22, 2010 |url=http://www.ses.com/4233325/news/2010/4489346|title=SES SIRIUS BECOMES SES ASTRA|access-date=January 26, 2012}}</ref>
-===Sirius 5===
+=== Sirius 5 ===
-Sirius 5 was the original name of the [[SES-5]] satellite. SES-5 that was launched in July 2012 and is now co-located with Astra 4A (Sirius 4) at 5°E. This satellite provides a similar European and African coverage as Astra 4A. When ordered by the SES-Sirius AB of Sweden in October 2008, the name of the satellite was Sirius 5. SES-Sirius was acquired by SES in 2010 and the company was named SES-Astra (a subsidiary of SES). This lead to the satellite being renamed to Astra 4B in 2010. The name was changed to SES-5 in 2011.
+Sirius 5 was the original name of the [[SES-5]] satellite. SES-5 that was launched in July 2012 and is now co-located with [[Astra 4A]] (Sirius 4) at 5.0° East. This satellite provides a similar European and African coverage as Astra 4A. When ordered by the [[SES Sirius]] AB of [[Sweden]] in October 2008, the name of the satellite was Sirius 5. SES Sirius was acquired by SES in 2010 and the company was named [[SES Astra]] (a subsidiary of SES). This led to the satellite being renamed to Astra 4B in 2010. The name was changed to SES-5 in 2011.
 == Retired satellites ==
 === Sirius 1 ===
-Sirius 1 (later Sirius W) was purchased from [[British Sky Broadcasting]] after [[Sky Television plc|Sky Television's]] merger with [[British Satellite Broadcasting]] (the merger was conducted on Sky's terms and BSB's satellites were sold in favour of Sky's leased [[SES Astra|Astra]] satellite operations). The satellite had previously operated as [[Marcopolo]] 1. It operated at 5° east from 1994 until 2000, when it was moved to 13° west. It operated here before being dumped to [[graveyard orbit]] in 2003.
+Sirius 1 (later Sirius W) was purchased from [[Sky UK|British Sky Broadcasting]] after [[Sky Television (1984–1990)|Sky Television's]] merger with [[British Satellite Broadcasting]] (BSB) (the merger was conducted on Sky's terms and BSB's satellites were sold in favour of Sky's leased [[SES Astra|Astra]] satellite operations). The satellite had previously operated as [[Thor (satellite)|Marcopolo 1]]. It operated at 5.0° East from 1994 until 2000, when it was moved to 13.0° West. It operated here before being moved to a [[graveyard orbit]] in 2003.
-===Sirius 2===
+=== Sirius 2 ===
 {{main|Astra 5A}}
-Sirius 2 was manufactured by [[Aérospatiale]] and launched from [[Kourou]] on November 12, 1997 to replace the [[Tele-X]] satellite. It is of the model [[Spacebus#Spacebus 3000B2|Spacebus 3000B2]] and has 32 [[Ku band|K<sub>u</sub> band]] transponders with beams targeting both the Nordic region and all of Europe.
+Sirius 2 was manufactured by [[Aérospatiale]] and launched from [[Kourou]] on 12 November 1997 to replace the [[Tele-X]] satellite. It is of the model [[Spacebus|Spacebus 3000B2]] and has 32 [[Ku band|K<sub>u</sub>-band]] transponders with beams targeting both the Nordic region and all of Europe.
-It was moved to [[Astra 31.5°E|31.5°E]] ({{coord|0|31.5|display=inline}}) and renamed [[Astra 5A]] on 29 April 2008. The Astra 5A satellite mission ended on 16 January 2009 due to an abnormal condition with the spacecraft.<ref>{{cite press release |publisher=SES Astra |date=January 16, 2009 |url=http://www.ses.com/4233325/news/2009/4468235|title=SES ASTRA Announces End Of ASTRA 5A Spacecraft Mission |accessdate = January 26, 2012}}</ref>
+It was moved to [[Astra 31.5°E|31.5° East]] ({{coord|0|31.5|display=inline}}) and renamed [[Astra 5A]] on 29 April 2008. The Astra 5A satellite mission ended on 16 January 2009 due to an abnormal condition with the spacecraft.<ref>{{cite press release|publisher=SES Astra|date=January 16, 2009|url=http://www.ses.com/4233325/news/2009/4468235|title=SES ASTRA Announces End Of ASTRA 5A Spacecraft Mission |access-date=January 26, 2012}}</ref>
-===Sirius 3===
-Sirius 3 was stationed at 51.2° East at the end if its lifetime({{coord|0|51.2|display=inline}}) in an inclined orbit.<ref>{{cite|publisher=Lyngsat|accessdate=24 November 2012|url=http://www.lyngsat.com/tracker/Sirius-3.html|title=Sirius 3 at 51.2°E|url-status=dead|archiveurl=https://web.archive.org/web/20121115081321/http://www.lyngsat.com/tracker/Sirius-3.html|archivedate=15 November 2012}}</ref> Sirius 3 was leased to SES immediately after its launch on October 5, 1998 for a period of 12 months (after which it was moved to its original destination of 5°E) to provide capacity at 28.2°E and to back up Astra 2A, pending the launch of [[Astra 2B]] on September 14, 2000.<ref>{{cite press release |publisher=SES Astra |date=15 January 1998 |url=http://www.ses-astra.com/business/en/news-events/press-archive/1998/28-b-10-98/index.php |title= Astra 2A ready for commercial operations at 28.2° east. Astra 1D to be relocated to 19.2° East}}</ref> Satellite was retired in 2015 and moved to a graveyard orbit.<ref>https://space.skyrocket.de/doc_sdat/sirius-3.htm</ref>
+=== Sirius 3 ===
+Sirius 3 was stationed at 51.2° East at the end if its lifetime ({{coord|0|51.2|display=inline}}) in an [[inclined orbit]].<ref>{{citation|publisher=Lyngsat|access-date=24 November 2012 |url=http://www.lyngsat.com/tracker/Sirius-3.html|title=Sirius 3 at 51.2°E|url-status=dead|archiveurl=https://web.archive.org/web/20121115081321/http://www.lyngsat.com/tracker/Sirius-3.html|archive-date=15 November 2012}}</ref> Sirius 3 was leased to SES immediately after its launch on 5 October 1998 for a period of 12 months (after which it was moved to its original destination of 5.0° East) to provide capacity at 28.2° East and to back up [[Astra 2A]], pending the launch of [[Astra 2B]] on 14 September 2000.<ref>{{cite press release|publisher=SES Astra|date=15 January 1998|url=http://www.ses-astra.com/business/en/news-events/press-archive/1998/28-b-10-98/index.php|title=Astra 2A ready for commercial operations at 28.2° East. Astra 1D to be relocated to 19.2° East}}</ref> Satellite was retired in 2015 and moved to a [[graveyard orbit]].<ref>{{Cite web|url=https://space.skyrocket.de/doc_sdat/sirius-3.htm|title=Sirius 3}}</ref>
 == Sirius Satellite Radio ==
-The Sirius satellites are not the satellites used for the American [[Sirius Satellite Radio]] service, whose satellites are named Radiosat 1–4 due to being launched after the Sirius fleet of satellites.
+The Sirius satellites are not the satellites used for the American [[Sirius Satellite Radio]] service, whose satellites are named [[Sirius Satellite Radio|Radiosat 1-4]] due to being launched after the Sirius fleet of satellites.
 == References ==
+{{Portal|Spaceflight}}
-{{reflist}}
+{{Reflist|2}}
-==External links==
+== External links ==
 {{kml}}
-*[http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=2004102210321971 Sirius 1 info from Swedish Space Corporation]
+* [http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=2004102210321971 Sirius 1 info from Swedish Space Corporation] {{Webarchive|url=https://web.archive.org/web/20090802025157/http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=2004102210321971 |date=2 August 2009 }}
-*[http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=20041022103241513 Sirius 2 info from Swedish Space Corporation]
+* [http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=20041022103241513 Sirius 2 info from Swedish Space Corporation] {{Webarchive|url=https://web.archive.org/web/20090802025202/http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=20041022103241513 |date=2 August 2009 }}
-*[http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=20041022103258782 Sirius 3 info from Swedish Space Corporation]
+* [http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=20041022103258782 Sirius 3 info from Swedish Space Corporation] {{Webarchive|url=https://web.archive.org/web/20090802025227/http://www.ssc.se/default.asp?groupid=2004102210358979&pageid=20041022103258782 |date=2 August 2009 }}
 * {{satbeams footprint|5642|Sirius}}
-*[http://www.onastra.com OnAstra] - Official Astra consumers/viewers' site
+* [http://www.ses.com/ SES] - Official SES site
-*[http://www.ses.com/ SES] - Official SES trade/industry site
+* [https://www.ses.com/our-coverage SES fleet information]
-*[https://web.archive.org/web/20111130040918/http://www.ses.com/4232618/fleet-coverage SES fleet information and map]
-[[Category:SES]]
+[[Category:SES (company)]]
 [[Category:Communications satellite constellations]]
 [[de:SES Sirius]]