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{{Short description|Hughes Aircraft Company satellite bus}}
{{Infobox spacecraft class
| name = HS-333
| image = Anik inspection.jpg
| image_size = 250px
| image_alt =
| image_caption =

| manufacturer = [[Hughes Aircraft Company]]
| designer =
| country =
| operator =
| applications =


| spacecraft_type = [[Satellite]]
| spacecraft_bus =
| constellation =
| design_life = 7 years{{r|gsp-anik|gsp-palapa|gsp-westar}}
| launch_mass = {{cvt|560|–|574|kg|lb}}{{r|gsp-hs333}}
| dry_mass = {{cvt|146|kg|lb}}
| payload_capacity = {{cvt|54|kg|lb}}
| crew_capacity =
| volume =
| power = 300 watts
| batteries =
| equipment =
| orbits =


| length = {{cvt|3.3|m|ft}}
| diameter = {{cvt|1.8|m|ft}}
| width =
| winged =
| span =


| status = Retired
| built =
| orders =
| launched = 8
| operational = 0
| retired = 8
| failed =
| lost =
| first = 10 November 1972
| last = 20 August 1979
| lastretired =


| stagedata =
{{Infobox rocket/stage
| name =
| engines =
| thrust =
| SI =
| time =
| fuel =
}}


| derivedfrom =
| derivatives =
| subsatellites =
| subsatellite_of =
| flown_with =


| insignia =
| insignia_size =
| insignia_alt =
| insignia_caption =


| configuration_image =
| configuration_image_size =
| configuration_image_alt =
| configuration_image_caption =

| previous =
| next = [[HS-376]]
}}

In 1970, [[Hughes Aircraft Company]] (HAC) Space and Communications Group offered the first standardized [[satellite]]: the '''HS 333''' design.{{r|Chechile_2023}} A spinning satellite, it was based on previous one-design satellites like [[Intelsat I]]. HAC built eight of these 300 [[watt]], 12 channel single antenna satellites between 1970 and 1977.<ref>Hughes Aircraft Corporation, Space and Communications Group, SBS F6 Prime sales brochure, 1985</ref>

==Design==
The early satellites were designed with cylindrical bodies to maximize the size of the satellite that could fit inside of the rocket's nose cone or fairing which was also round. The early design satellites also relied on spinning at about 30 [[Revolutions per minute|rpm]] for stability in orbit. The spinning satellite is a [[gyroscope]].

Several parallel decks, including the top and bottom, were used to mount the propulsion, attitude control, communication, Telemetry & Command (T&C), and power equipment. The upper deck or top of the satellite contained the payload antenna and the T&C antenna.

The outer surface of the cylindrical body was covered with solar cells to generate power for operating the satellite's electrical equipment. Batteries provide power during an eclipse when the satellite is in the shadow of the Earth. The batteries are recharged by excess power from the solar array.

The HS 333 was 1.8 m (6 ft) in diameter and nominally 3.3 m (11 ft) high. The solar array and batteries provided sufficient power over the satellite's 7-year design life to power the 190 [[Watt|W]] payload and 233 W spacecraft equipment. The payload contributed 54 kg (119 lb) of the HS 333's 146 kg (542 lb) dry mass.

== Satellites ==
Eight HS-333 satellites were launched from 1972 to 1979:
{| class="wikitable sortable"
!Satellite
!Operator
!Launch date (UTC)
!Carrier rocket{{r|LL}}
!Mass
!Longitude
!Retirement
!Remarks
|-
| [[Anik A1]]{{r|gsp-hs333}}
| {{flagicon|CAN}} [[Telesat Canada]]{{r|gsp-anik}}
| {{dts|10 November 1972}} 01:14:03{{r|LL}}
| [[Delta 1000|Delta 1914]]{{r|gsp-anik}}
| {{cvt|560|kg|lb}}{{r|gsp-anik}}
| 104°W{{r|tse-anik-a1}} 114°W
| {{dts|15 July 1982}}
|
|-
| [[Anik A2]]{{r|gsp-hs333}}
| {{flagicon|CAN}} [[Telesat Canada]]{{r|gsp-anik}}
| {{dts|20 April 1973}} 23:47:03{{r|LL}}
| [[Delta 1000|Delta 1914]]{{r|gsp-anik}}
| {{cvt|560|kg|lb}}{{r|gsp-anik}}
| 109°W{{r|tse-anik-a2}}
| {{dts|6 October 1982}}
|
|-
| [[Westar 1]]{{r|gsp-hs333}}
| {{flagicon|USA}} [[Western Union]]{{r|gsp-westar}}
| {{dts|13 April 1974}} 23:33:03{{r|LL}}
| [[Delta 2000|Delta 2914]]{{r|gsp-westar}}
| {{cvt|574|kg|lb}}{{r|gsp-westar}}
| 99°W{{r|tse-westar-1}}
| {{dts|April 1983}}
|
|-
| [[Westar 2]]{{r|gsp-hs333}}
| {{flagicon|USA}} [[Western Union]]{{r|gsp-westar}}
| {{dts|10 October 1974}} 23:53:00{{r|LL}}
| [[Delta 2000|Delta 2914]]{{r|gsp-westar}}
| {{cvt|574|kg|lb}}{{r|gsp-westar}}
| 125°W{{r|tse-westar-2}}
|
|
|-
| [[Anik A3]]{{r|gsp-hs333}}
| {{flagicon|CAN}} [[Telesat Canada]]{{r|gsp-anik}}
| {{dts|7 May 1975}} 23:35:26{{r|LL}}
| [[Delta 2000|Delta 2914]]{{r|gsp-anik}}
| {{cvt|560|kg|lb}}{{r|gsp-anik}}
| 104°W{{r|tse-anik-a3}} 115°W
| {{dts|21 November 1984}}
|
|-
| [[Palapa A1]]{{r|gsp-hs333}}
| {{flagicon|IDN}} [[Perumtel]]{{r|gsp-palapa}}
| {{dts|8 July 1976}} 23:31{{r|LL}}
| [[Delta 2000|Delta 2914]]{{r|gsp-palapa}}
| {{cvt|574|kg|lb}}{{r|gsp-palapa}}
| 83°E{{r|tse-palapa-a1}}
| {{dts|1985}}{{r|tse-palapa-a1}}
|
|-
| [[Palapa A2]]{{r|gsp-hs333}}
| {{flagicon|IDN}} [[Perumtel]]{{r|gsp-palapa}}
| {{dts|10 March 1977}} 23:16{{r|LL}}
| [[Delta 2000|Delta 2914]]{{r|gsp-palapa}}
| {{cvt|574|kg|lb}}{{r|gsp-palapa}}
| 77°E{{r|tse-palapa-a2}}
| {{dts|1988}}{{r|tse-palapa-a2}}
|
|-
| [[Westar 3]]{{r|gsp-hs333}}
| {{flagicon|USA}} [[Western Union]]{{r|gsp-westar}}
| {{dts|20 August 1979}} 00:20{{r|LL}}
| [[Delta 2000|Delta 2914]]{{r|gsp-westar}}
| {{cvt|574|kg|lb}}{{r|gsp-westar}}
| 91°W{{r|tse-westar-3}}
|
|
|-
|}

== References ==
{{Reflist|refs=

<ref name="Chechile_2023">{{Cite book
| author1= I. Chechile
| title= Space Technology: A Short Introduction
| year= 2023
| publisher= Springer
| pages= 8-9
| isbn= 978-3-031-34817-4 }}
</ref>

<ref name="gsp-anik">{{cite web
| author1= G. D. Krebs
| title= Anik A 1, 2, 3
| url= https://space.skyrocket.de/doc_sdat/anik-a.htm
| website= Gunter's Space Page
| access-date= 4 July 2012 }}
</ref>

<ref name="gsp-hs333">{{cite web
| author1= G. D. Krebs
| url= https://space.skyrocket.de/doc_sat/hs-333-356.htm
| title= Hughes: HS-333 / HS-356
| website= Gunter's Space Page
| access-date= 4 July 2012 }}
</ref>

<ref name="gsp-palapa">{{cite web
| author1= G. D. Krebs
| title= Palapa A 1, 2
| url= https://space.skyrocket.de/doc_sdat/palapa-a.htm
| website= Gunter's Space Page
| access-date= 4 July 2012 }}
</ref>

<ref name="gsp-westar">{{cite web
| author1= G. D. Krebs
| title=Westar 1, 2, 3
| url= https://space.skyrocket.de/doc_sdat/westar-1.htm
| website= Gunter's Space Page
| access-date= 4 July 2012 }}
</ref>

<ref name="LL">{{cite web
| author1= J. McDowell
| title= Launch Log
| url= http://planet4589.org/space/log/launchlog.txt
| website= Jonathan's Space Page
| access-date= 4 July 2012
| type= TXT }}
</ref>

<ref name="tse-anik-a1">{{cite web
| title= Anik A1
| url= http://www.tbs-satellite.com/tse/online/sat_anik_a1.html
| website= The Satellite Encyclopedia
| access-date= 13 April 2025 }}
</ref>

<ref name="tse-anik-a2">{{cite web
| title= Anik A2
| url= http://www.tbs-satellite.com/tse/online/sat_anik_a2.html
| website= The Satellite Encyclopedia
| access-date= 13 April 2025 }}
</ref>

<ref name="tse-anik-a3">{{cite web
| title= Anik A3
| url= http://www.tbs-satellite.com/tse/online/sat_anik_a3.html
| website= The Satellite Encyclopedia
| access-date= 13 April 2025 }}
</ref>

<ref name="tse-palapa-a1">{{cite web
| title= Palapa A1
| url= http://www.tbs-satellite.com/tse/online/sat_palapa_a1.html
| website= The Satellite Encyclopedia
| access-date= 13 April 2025 }}
</ref>

<ref name="tse-palapa-a2">{{cite web
| title= Palapa A2
| url= http://www.tbs-satellite.com/tse/online/sat_palapa_a2.html
| website= The Satellite Encyclopedia
| access-date= 13 April 2025 }}
</ref>

<ref name="tse-westar-1">{{cite web
| title= Westar 1
| url= http://www.tbs-satellite.com/tse/online/sat_westar_1.html
| website= The Satellite Encyclopedia
| access-date= 13 April 2025 }}
</ref>

<ref name="tse-westar-2">{{cite web
| title= Westar 2
| url= http://www.tbs-satellite.com/tse/online/sat_westar_2.html
| website= The Satellite Encyclopedia
| access-date= 13 April 2025 }}
</ref>

<ref name="tse-westar-3">{{cite web
| title= Westar 3
| url= http://www.tbs-satellite.com/tse/online/sat_westar_3.html
| website= The Satellite Encyclopedia
| access-date= 13 April 2025 }}
</ref>

}}

==See also==
* [[Comparison of satellite buses]]

{{Hughes satellites}}

[[Category:Satellite buses]]

HS-333 - Revision history

imported>KyloRen2017: {{More citations needed}} notification fulfilled on 13 April 2025