Kosmos 99

{{Short description|Soviet reconnaissance satellite (Zenit 2-32)}}

{{Use dmy dates|date=January 2014}}

{{Use British English|date=January 2014}}

{{Infobox spaceflight

| name = Kosmos 99

| names_list = Zenit 2-32

| image = Zenit space vehicle.jpg

| image_caption = A Zenit reentry capsule

| mission_type = Optical imaging reconnaissance

| operator = OKB-1

| COSPAR_ID = 1965-103A

| SATCAT = 1817

| mission_duration = {{time interval|10 December 1965|18 December 1965}}

| spacecraft_type = Zenit-2

| manufacturer = OKB-1

| dry_mass =

| launch_mass = 4730 kg{{cite web|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1965-103A|title=Cosmos 99 - NSSDCA/COSPAR ID: 1965-103A - Spacecraft - Details

|publisher=NASA| date=27 February 2020|access-date=26 March 2020}}

| dimensions =

| power =

| launch_date = 10 December 1965
08:09:00 GMT

| launch_rocket = Vostok-2

| launch_site = Baikonur 31/6

| launch_contractor =

| disposal_type = Recovered

| landing_date = 18 December 1965

| landing_site =

| orbit_epoch = 10 December 1965

| orbit_reference = Geocentric{{cite web|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1965-103A|title=Cosmos 99 - NSSDCA ID: 1965-103A - Spacecraft - Telemetry Details|publisher=NASA|date=27 February 2020|access-date=26 March 2020}}

| orbit_regime = Low Earth

| orbit_periapsis = 203 km

| orbit_apoapsis = 309 km

| orbit_inclination = 65.0°

| orbit_period = 89.6 minutes

| apsis = gee

| programme = Zenit programme
Zenit-2

| previous_mission = Zenit 2-31

| next_mission = Zenit 2-33

| programme2 = Kosmos (satellites)

| previous_mission2 = Kosmos 98

| next_mission2 = Kosmos 100

}}

Kosmos 99 ({{langx|ru|Космос 99}} meaning Cosmos 99) or Zenit-2 No.32 was a Soviet, first generation, low resolution, optical film-return reconnaissance satellite launched in 1965. A Zenit-2 spacecraft, Kosmos 99 was the thirty-second of eighty-one such satellites to be launched{{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=1 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}} and had a mass of {{convert|4730|kg|lb}}.

Kosmos 99 was launched by a Vostok-2 rocket, serial number U15001-04,{{cite encyclopedia|url=http://www.astronautix.com/lvs/vosk8a92.htm|title=Vostok 8A92|first=Mark|last=Wade |encyclopedia=Encyclopedia Astronautica|access-date=1 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}} flying from Site 31/6 at the Baikonur Cosmodrome. The launch took place at 08:09 GMT on 10 December 1965.{{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=1 January 2014}} Following its successful arrival in orbit the spacecraft received its Kosmos designation; along with the International Designator 1965-103A and the Satellite Catalog Number 01817.

Kosmos 99 was operated in a low Earth orbit, at an epoch of 10 December 1965, it had a perigee of {{convert|203|km|mi}}, an apogee of {{convert|309|km|mi}}, an inclination of 65.0° and an orbital period of 89.6 minutes.{{cite web|url=http://planet4589.org/space/log/satcat.txt|title=Satellite Catalog|first=Jonathan |last=McDowell |work=Jonathan's Space Page|access-date=1 January 2014}} On 18 December 1965, after eight days in orbit, the satellite was deorbited with its return capsule descending by parachute for recovery by the Soviet force.{{cite encyclopedia|url=http://www.astronautix.com/craft/zenit2.htm|title=Zenit-2|first=Mark|last=Wade|encyclopedia=Encyclopedia Astronautica|access-date=1 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}}