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Kosmos 818
Spacecraft properties

Mission type	ABM radar target
COSPAR ID	1976-044A
SATCAT no.	08851


Spacecraft type	DS-P1-Yu
Manufacturer	Yuzhnoye
Launch mass	400 kilograms (880 lb)


Start of mission
Launch date	18 May 1976, 11:00 (1976-05-18UTC11Z) UTC
Rocket	Kosmos-2I 63SM
Launch site	Plesetsk 133/1


End of mission
Decay date	7 March 1977 (1977-03-08)


Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	267 kilometres (166 mi)
Apogee altitude	468 kilometres (291 mi)
Inclination	71 degrees
Period	91.9 minutes

Kosmos 818 (Russian: Космос 818 meaning Cosmos 818), also known as DS-P1-Yu No.78, was a Soviet satellite which was launched in 1976 as part of the Dnepropetrovsk Sputnik programme. It was a 400-kilogram (880 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and was used as a radar calibration target for anti-ballistic missile tests.^[1]

A Kosmos-2I 63SM carrier rocket was used to launch Kosmos 818 from Site 133/1 of the Plesetsk Cosmodrome.^[2] The launch occurred at 11:00 UTC on 18 May 1976, and resulted in the successfully insertion of the satellite into low Earth orbit.^[3] Upon reaching orbit, the satellite was assigned its Kosmos designation, and received the International Designator 1976-044A.^[4] The North American Aerospace Defense Command assigned it the catalogue number 08851.

Kosmos 818 was the seventy-eighth and penultimate DS-P1-Yu satellite to be launched,^[1] and the seventy-first to successfully reach orbit.^[5] It was operated in an orbit with a perigee of 267 kilometres (166 mi), an apogee of 468 kilometres (291 mi), 71 degrees of inclination, and an orbital period of 91.9 minutes.^[6] It remained in orbit until it decayed and reentered the atmosphere on 7 March 1977.^[6]

References

^ ^a ^b Wade, Mark. "DS-P1-Yu". Encyclopedia Astronautica. Archived from the original on 2 June 2012. Retrieved 2 September 2009.
^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 2 September 2009.
^ Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Archived from the original on 18 June 2012. Retrieved 2 September 2009.
^ "Cosmos 818". NSSDC Master Catalog. US National Space Science Data Center. Retrieved 2 September 2009.
^ Krebs, Gunter. "DS-P1-Yu (11F618)". Gunter's Space Page. Retrieved 2 September 2009.
^ ^a ^b McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 2 September 2009.

Dnepropetrovsk Sputnik programme

DS-1

DS-2

Kosmos 1
#2

DS-A1

DS-K

DS-MG

DS-MT

DS-MO

DS-P1

Test	Kosmos 6 #2 Kosmos 19 Kosmos 25
P1-I	Kosmos 106 Kosmos 148 Kosmos 204 Kosmos 242 Kosmos 275 Kosmos 308 #6 Kosmos 327 Kosmos 362 Kosmos 391 Kosmos 440 Kosmos 497 Kosmos 615 Kosmos 662 Kosmos 750 Kosmos 801 Kosmos 849 Kosmos 901 Kosmos 919
P1-M	#1 Kosmos 394 Kosmos 400 Kosmos 459 Kosmos 521
P1-M Lira	#1 Kosmos 803 Kosmos 839 Kosmos 880 Kosmos 909 Kosmos 959 Kosmos 967 Kosmos 1171 Kosmos 1241 Kosmos 1375
P1-Yu	Kosmos 36 #2 Kosmos 76 Kosmos 101 Kosmos 116 Kosmos 123 Kosmos 152 Kosmos 165 Kosmos 173 Kosmos 176 Kosmos 191 Kosmos 211 Kosmos 221 Kosmos 222 Kosmos 233 Kosmos 245 Kosmos 257 Kosmos 265 Kosmos 268 Kosmos 277 Kosmos 283 Kosmos 285 #23 Kosmos 295 Kosmos 303 Kosmos 307 Kosmos 311 Kosmos 314 Kosmos 319 Kosmos 324 Kosmos 334 #36 Kosmos 347 Kosmos 351 Kosmos 357 Kosmos 369 Kosmos 380 Kosmos 388 Kosmos 393 #39 Kosmos 408 Kosmos 421 Kosmos 423 #33 Kosmos 435 Kosmos 453 Kosmos 455 Kosmos 458 Kosmos 467 Kosmos 472 Kosmos 481 Kosmos 485 Kosmos 487 #51 Kosmos 498 Kosmos 501 Kosmos 523 Kosmos 524 Kosmos 526 Kosmos 545 Kosmos 553 Kosmos 558 Kosmos 562 Kosmos 580 Kosmos 601 Kosmos 608 Kosmos 611 Kosmos 633 Kosmos 634 #68 Kosmos 668 Kosmos 686 Kosmos 695 Kosmos 703 Kosmos 705 Kosmos 725 Kosmos 745 Kosmos 818 Kosmos 850

DS-U1

DS-U2

DS-U3

Omega

← 1975

Orbital launches in 1976

1977 →

Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).

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