What is Salyut 3?
{{Infobox space station | station = Salyut 3 (OPS-2) | station_image = | station_image_size = | station_image_caption = | extra_image = | extra_image_size = | extra_image_caption = | insignia = Salyut program insignia.svg | insignia_size = 160px | insignia_caption = | sign = Salyut 3 | crew = 2 | launch = 25 June 1974<br />04:15:00 [[Coordinated Universal Time|UTC]]<ref name=rsw /> | launch_pad = [[Baikonur Cosmodrome Site 81|LC-81/23]], [[Baikonur Cosmodrome]], [[Soviet Union]]<ref name=rsw /> | reentry = 24 January 1975 | mass = 18,900 [[kilogram|kg]] (at launch)<ref name=MHH>{{cite web|url=http://ston.jsc.nasa.gov/collections/TRS/_techrep/RP1357.pdf|title=Mir Hardware Heritage|publisher=NASA|author=D.S.F. Portree|date=March 1995|url-status=dead|archive-url=https://www.webcitation.org/5il9QixAg?url=http://ston.jsc.nasa.gov/collections/TRS/_techrep/RP1357.pdf|archive-date=2009-08-03}}</ref> | length = 14.55 m<ref name=MHH /> | width = 4.15 m (maximum diameter)<ref name=MHH /> | height = | volume = 90&nbsp;m³<ref name=MHH /> | pressure = | perigee = {{convert|219|km|mi}} (initial orbit)<ref name=TheContinuing>{{cite book|title=The continuing story of the International Space Station|author=Peter Bond|pages=416|publisher=Springer|date=20 June 2002|isbn=1-85233-567-X|url=https://archive.org/details/continuingstoryo0000bond|url-access=registration}}</ref> | apogee = {{convert|270|km|mi}} (initial orbit)<ref name=TheContinuing /> | inclination = 51.6 [[degree (angle)|degrees]]<ref name=nssdc /> | altitude = | speed = | period = 89.1 [[minute]]s<ref name=nssdc /> | orbits_day = | in_orbit = 213 days | occupied = 1