Kosmos 378

Mission type	Ionospheric
COSPAR ID	1970-097A
SATCAT no.	04713
Spacecraft properties
Spacecraft type	DS-U2-IP
Manufacturer	Yuzhnoye
Launch mass	710 kilograms (1,570 lb)[1]
Start of mission
Launch date	17 November 1970, 18:20:01 (1970-11-17UTC18:20:01Z) UTC
Rocket	Kosmos-3M
Launch site	Plesetsk 132/2
End of mission
Decay date	17 August 1972 (1972-08-18)
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	233 kilometres (145 mi)
Apogee altitude	1,697 kilometres (1,054 mi)
Inclination	74 degrees
Period	104.4 minutes

Kosmos 378 (Russian: Космос 378 meaning Cosmos 378), also known as DS-U2-IP No.1, was a Soviet satellite which was launched in 1970 as part of the Dnepropetrovsk Sputnik programme. It was a 710-kilogram (1,570 lb) spacecraft,^[1] which was built by the Yuzhnoye Design Bureau, and was used to study the ionosphere.^[1]

A Kosmos-3M 11K65M carrier rocket, serial number 47117-107, was used to launch Kosmos 378 into low Earth orbit.^[2] It was launched at 18:20:01 UTC on 17 November 1970, from Site 132/2 at the Plesetsk Cosmodrome.^[2] The launch resulted in the successful insertion of the satellite into orbit.^[3] Upon reaching orbit, the satellite was assigned its Kosmos designation, and received the International Designator 1970-097A.^[4] The North American Aerospace Defense Command assigned it the catalogue number 04713.

Kosmos 378 was the only DS-U2-IP satellite to be launched.^[1][5] It was operated in an orbit with a perigee of 233 kilometres (145 mi), an apogee of 1,697 kilometres (1,054 mi), 74 degrees of inclination, and an orbital period of 104.4 minutes.^[6] It completed operations on 13 September 1971,^[7] before decaying from orbit and reentering the atmosphere on 17 August 1972.^[6]

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