Kosmos 775 (russian: Космос 775 meaning ''Cosmos 775'') is a Soviet

US-KS Upravlyaemy Sputnik Kontinentalny Statsionarny (russian: Управляемый Спутник Континентальный Стационарный meaning ''Stationary Continental Controllable Satellite''), or US-KS (russian: УС-КС), also ...

missile

early warning satellite An early warning satellite is a satellite designed to rapidly detect ballistic missile launches and thus enable defensive military action. To do this, these satellites use infrared detectors that identify the missile thanks to the heat given off ...

which was launched in 1975 as part of the

Oko OKO ( rus, ОКО, r=, literally means eye, also an abbreviation for Ob'yedinonnyye Kristallom Osnovaniya ( rus, Oбъединённые Кристаллом Oснования, r=, literally means Foundations Bound by a Crystal)) is a complex o ...

programme. The satellite is designed to identify missile launches using

optical telescope An optical telescope is a telescope that gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electro ...

s and

infrared sensor Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye. IR is generally understood to encompass wavelengths from around ...

s. Kosmos 775 was launched from Site 81/23 at

Baikonur Cosmodrome The Baikonur Cosmodrome ( kk, Байқоңыр ғарыш айлағы, translit=Baiqoñyr ğaryş ailağy, ; russian: Космодром Байконур, translit=Kosmodrom Baykonur, ) is a spaceport in an area of southern Kazakhstan leased to R ...

in the Kazakh SSR. A Proton-K carrier rocket with a DM upper stage was used to perform the launch, which took place at 00:30 UTC on 8 October 1975. The launch attempted to place the satellite into

geostationary orbit A geostationary orbit, also referred to as a geosynchronous equatorial orbit''Geostationary orbit'' and ''Geosynchronous (equatorial) orbit'' are used somewhat interchangeably in sources. (GEO), is a circular geosynchronous orbit in altitud ...

. It subsequently received its Kosmos designation, and the international designator 1975-097A. The United States Space Command assigned it the Satellite Catalog Number 8357. It was the first US-KS satellite and was never operational. Podvig says its orbit was never stabilised, NASA's National Space Science Data Centre says it exploded. The next launch of one of these craft was Kosmos 1546 in 1984.

References

Kosmos satellites Oko 1975 in the Soviet Union 1975 in spaceflight Spacecraft launched in 1975 Spacecraft launched by Proton rockets {{USSR-spacecraft-stub

See also

References