{{Short description|Soviet reconnaissance satellite (Zenit 2-33)}} {{Use dmy dates|date=January 2014}} {{Use British English|date=January 2014}} {{Infobox spaceflight | name = Kosmos 104 | names_list = Zenit 2-33 | image = Zenit space vehicle.jpg | image_caption = ''A Zenit reentry capsule''
| mission_type = Optical imaging reconnaissance | operator = OKB-1 | COSPAR_ID = 1966-001A | SATCAT = 1903 | mission_duration = {{time interval|7 January 1966|15 January 1966}}
| spacecraft_type = Zenit-2 | manufacturer = OKB-1 | dry_mass = | launch_mass = 4730 kg<ref>https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-001A - 27 February 2020</ref> | dimensions = | power =
| launch_date = 7 January 1966<br/>08:24:00 GMT | launch_rocket = Vostok-2 | launch_site = Baikonur 31/6 | launch_contractor = OKB-1
| disposal_type = Recovered | landing_date = 15 January 1966 | landing_site =
| orbit_epoch = 7 January 1966 | orbit_reference = Geocentric<ref>https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1966-001A - 27 February 2020</ref> | orbit_regime = Low Earth | orbit_periapsis = 193 km | orbit_apoapsis = 380 km | orbit_inclination = 65.0° | orbit_period = 90.2 minutes | apsis = gee
| programme = '''Zenit programme'''<br/><small>Zenit-2</small> | previous_mission = Zenit 2-32 | next_mission = Zenit 2-34 | programme2 = '''Kosmos (satellites)''' | previous_mission2 = Kosmos 103 | next_mission2 = Kosmos 105 }} '''Kosmos 104''' ({{lang|ru|Космос 104}} meaning ''Cosmos 104'') or '''Zenit-2 No.33''' was a Soviet first-generation low-resolution optical film–return reconnaissance satellite launched in 1966. A Zenit-2 spacecraft, Kosmos 104 was the thirty-second of eighty-one such satellites to be launched<ref name="gsp">{{cite web |url=http://space.skyrocket.de/doc_sdat/zenit-2.htm|title=Zenit-2 (11F61)|first=Gunter|last=Krebs|work=Gunter's Space Page|access-date=2 January 2014|archive-url=https://web.archive.org/web/20111231133235/http://space.skyrocket.de/doc_sdat/zenit-2.htm|archive-date=31 December 2011|url-status=dead}}</ref> and had a mass of {{convert|4730|kg|lb}}.
Kosmos 104 was launched by a Vostok-2 rocket<ref>{{cite encyclopedia|url=http://www.astronautix.com/lvs/vosk8a92.htm|title=Vostok 8A92|first=Mark|last=Wade|encyclopedia=Encyclopedia Astronautica |access-date=2 January 2014|url-status=dead|archive-url=https://web.archive.org/web/20160822074413/http://www.astronautix.com/lvs/vosk8a92.htm|archive-date=22 August 2016|df=dmy-all}}</ref> from Site 31/6 at the Baikonur Cosmodrome. The launch took place at 08:24 GMT on 7 January 1966;<ref>{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|author-link=Jonathan McDowell|work=Jonathan's Space Page|access-date=2 January 2014}}</ref> however, the program was not completely met. The spacecraft was put into an incorrect orbit by malfunctions in the booster rocket's second and third stages.<ref>https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-001A - 27 February 2020</ref> The spacecraft received a Kosmos designation, along with the International Designator 1966-001A and the Satellite Catalog Number 01903.<ref>{{cite web|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-001A|title=Cosmos 104 |publisher=National Space Science Data Center|access-date=2 January 2014}}</ref>
Despite the problem during its launch, Kosmos 104 was able to complete most of its imaging mission. Its orbit, at an epoch of 7 January 1966, had a perigee of {{convert|193|km|mi}}, an apogee of {{convert|380|km|mi}} inclination of 65.0° and a period of 90.2 minutes.<ref>{{cite web |url=http://planet4589.org/space/log/satcat.txt|title=Satellite Catalog|first=Jonathan|last=McDowell|work=Jonathan's Space Page|access-date=2 January 2014}}</ref> On 15 January 1966, after eight days in orbit, the satellite was deorbited with its return capsule descending by parachute for a successful recovery by Soviet force.<ref>{{cite encyclopedia|url=http://www.astronautix.com/craft/zenit2.htm|title=Zenit-2 |first=Mark|last=Wade|encyclopedia=Encyclopedia Astronautica|access-date=2 January 2014|url-status=dead|archive-url=https://web.archive.org/web/20120523064141/http://www.astronautix.com/craft/zenit2.htm|archive-date=23 May 2012|df=dmy-all}}</ref>
==References== {{reflist}}
{{Portal|Spaceflight}} {{Orbital launches in 1966}} {{Zenit-2 satellites}}
{{DEFAULTSORT:Kosmos 0104}} Category:Kosmos satellites Category:Satellite launch anomalies Category:Spacecraft launched in 1966 Category:Spacecraft which reentered in 1966 Category:Zenit-2 satellites Category:1966 in the Soviet Union
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