Kosmos 521

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Kosmos 521
Mission type ASAT target
COSPAR ID 1972-074A
Spacecraft properties
Spacecraft type DS-P1-M
Manufacturer Yuzhnoye
Launch mass 650 kilograms (1,430 lb)
Start of mission
Launch date 29 September 1972, 20:18:59 (1972-09-29UTC20:18:59Z) UTC
Rocket Kosmos-3M
Launch site Plesetsk 132/2
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee 987 kilometres (613 mi)
Apogee 992 kilometres (616 mi)
Inclination 65.8 degrees
Period 104.9 minutes

Kosmos 521 (Russian: Космос 521 meaning Cosmos 521), also known as DS-P1-M No.4 is a satellite which was intended for use as a target for tests of anti-satellite weapons. It was launched by the Soviet Union in 1972 as part of the Dnepropetrovsk Sputnik programme,[1] and was to have been used as a target for an IS-A interceptor, as part of the Istrebitel Sputnik programme. A malfunction aboard the satellite rendered it useless, and the interceptor was not launched.[2]

It was launched aboard a Kosmos-3M carrier rocket,[3] from Site 132/2 at the Plesetsk Cosmodrome. The launch occurred at 20:18:59 UTC on 29 September 1972.[4]

Kosmos 521 was placed into a low Earth orbit with a perigee of 987 kilometres (613 mi), an apogee of 992 kilometres (616 mi), 65.8 degrees of inclination, and an orbital period of 104.9 minutes.[1] No attempt to intercept the satellite was made after its onboard telemetry system malfunctioned. As of 2009, it is still in orbit.[2][5] Western analysts did not identify Kosmos 521 as being associated with the Soviet ASAT programme until records were declassified.

Kosmos 521 was the last of the five original DS-P1-M satellites to be launched,[1] of which all but the first were successfully reached orbit. Despite its successful launch, the satellite malfunctioned shortly after reaching orbit, and was unusable. Subsequent launches used a modified version of the DS-P1-M, known as Lira.[6]

See also

References

  1. ↑ 1.0 1.1 1.2 Wade, Mark. "DS-P1-I". Encyclopedia Astronautica. Retrieved 29 May 2009. 
  2. ↑ 2.0 2.1 Wade, Mark. "IS-A". Encyclopedia Astronautica. Retrieved 29 May 2009. 
  3. ↑ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 29 May 2009. 
  4. ↑ Wade, Mark. "Kosmos 3". Encyclopedia Astronautica. Retrieved 29 May 2009. 
  5. ↑ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 29 May 2009. 
  6. ↑ Wade, Mark. "DS". Encyclopedia Astronautica. Retrieved 29 May 2009. 
DS-1
  • #1
  • #2
DS-2
DS-A1
DS-K
DS-MG
DS-MT
DS-MO
DS-P1
Test
P1-I
P1-M
P1-M Lira
P1-Yu
DS-U1
DS-U2
DS-U3
  • Kosmos 166
  • Kosmos 230
  • Interkosmos 1
  • Interkosmos 4
  • Interkosmos 7
  • Interkosmos 11
  • Interkosmos 14
  • Interkosmos 16
Omega
← 1971  ·  Orbital launches in 1972  ·  1973 →
Kosmos 471 | OPS 1737 · OPS 7719 | Intelsat IV F-4 | Kosmos 472 | HEOS-2 | Kosmos 473 | Luna 20 | Kosmos 474 | OPS 1844 | Kosmos 475 | OPS 1570 | Kosmos 476 | Pioneer 10 | Kosmos 477 · Nauka-14KS No.1 | TD-1A | Kosmos 478 | OPS 1678 | Kosmos 479 | OPS 5058 | Kosmos 480 | Kosmos 481 | Venera 8 | Meteor-MV No.23 | Kosmos 482 | Kosmos 483 | Molniya-1 No.27 · SRET-1 | Kosmos 484 · Nauka-5KS No.3 | Interkosmos 6 | Kosmos 485 | Prognoz 1 | Kosmos 486 | Apollo 16 (PFS-2) | OPS 5640 | Kosmos 487 | DS-P1-Yu No. 51 | Kosmos 488 | Kosmos 489 | Kosmos 490 · Nauka-1KS No.5 | Molniya-2-2 | OPS 6574 | Kosmos 491 | OPS 6371 | Kosmos 492 | Intelsat IV F-5 | Kosmos 493 | Kosmos 494 | Kosmos 495 | Kosmos 496 | Prognoz 2 | Interkosmos 7 | Kosmos 497 | Meteor-MV No.26 | Kosmos 498 | Kosmos 499 | OPS 7293 · OPS 7803 | Kosmos 500 | Kosmos 501 | Kosmos 502 | Kosmos 503 | Kosmos 504 · Kosmos 505 · Kosmos 506 · Kosmos 507 · Kosmos 508 · Kosmos 509 · Kosmos 510 · Kosmos 511 | ERTS-1 | Kosmos 512 | DOS No.122 | Kosmos 513 | Explorer 46 | Kosmos 514 | Kosmos 515 | Denpa | Copernicus | Kosmos 516 | Kosmos 517 | OPS 8888 | Unnamed | Triad 1 | Kosmos 518 | Kosmos 519 | Kosmos 520 | Explorer 47 | Kosmos 521 | Molniya-2-3 | Radcat 2 · Radsat | Kosmos 522 | Kosmos 523 | OPS 8314 · OPS 8314/2 | Kosmos 524 | Molniya-1 No.26 | NOAA-2 · OSCAR-6 | Unnamed | Kosmos 525 · Nauka-16KS No.1L | Kosmos 526 | Meteor-M No.25 | Kosmos 527 | Kosmos 528 · Kosmos 529 · Kosmos 530 · Kosmos 531 · Kosmos 532 · Kosmos 533 · Kosmos 534 · Kosmos 535 | Kosmos 536 | OPS 7323 | Anik A1 | Explorer 48 | ESRO-4 | Unnamed | Kosmos 537 | Interkosmos 8 | Molniya-1 No.28 | Apollo 17 | Nimbus 5 | Molniya-2-4 | Kosmos 538 | Aeros 1 | OPS 9390 | Kosmos 539 | OPS 3978 | Kosmos 540 | Kosmos 541 | Kosmos 542
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).
I1P
  • Polyot 1
  • Polyot 2
IS-A
  • Kosmos 185
  • Kosmos 249
  • Kosmos 252
  • Kosmos 316
  • Kosmos 374
  • Kosmos 375
  • Kosmos 397
  • Kosmos 404
  • Kosmos 462
  • Kosmos 804
  • Kosmos 814
  • Kosmos 843
  • Kosmos 886
  • Kosmos 910
  • Kosmos 918
  • Kosmos 961
  • Kosmos 970
  • Kosmos 1009
  • Kosmos 1174
  • Kosmos 1243
  • Kosmos 1258
  • Kosmos 1379
IS-P
  • Kosmos 217
  • Kosmos 248
  • Kosmos 291
  • Kosmos 373
Other targets


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