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Kosmos 257 (Russian: Космос 257 meaning Cosmos 257), known before launch as DS-P1-Yu No.17, was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was built by the Yuzhnoye Design Bureau, and launched in 1968 as part of the Dnepropetrovsk Sputnik programme. It had a mass of 325 kilograms (717 lb).

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  • Cosmos 257 (es)
  • Kosmos 257 (en)
  • Kosmos 257 (pt)
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  • Cosmos 257 (en cirílico, Космос 257) fue un satélite artificial militar soviético perteneciente a la clase de satélites DS (de tipo DS-P1-Yu) y lanzado el 3 de diciembre de 1968​​​​ mediante un cohete desde el cosmódromo de Plesetsk.​ (es)
  • O Kosmos 257 (em russo: Космос 257) também denominado DS-P1-Yu Nº 17, foi um satélite artificial soviético lançado ao espaço com sucesso no dia 3 de dezembro de 1968 através de um foguete Kosmos-2I a partir do Cosmódromo de Plesetsk. (pt)
  • Kosmos 257 (Russian: Космос 257 meaning Cosmos 257), known before launch as DS-P1-Yu No.17, was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was built by the Yuzhnoye Design Bureau, and launched in 1968 as part of the Dnepropetrovsk Sputnik programme. It had a mass of 325 kilograms (717 lb). (en)
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  • Kosmos 257 (en)
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  • Kosmos 257 (en)
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  • Kosmos-2I 63SM (en)
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  • ABM radar target (en)
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  • Cosmos 257 (en cirílico, Космос 257) fue un satélite artificial militar soviético perteneciente a la clase de satélites DS (de tipo DS-P1-Yu) y lanzado el 3 de diciembre de 1968​​​​ mediante un cohete desde el cosmódromo de Plesetsk.​ (es)
  • Kosmos 257 (Russian: Космос 257 meaning Cosmos 257), known before launch as DS-P1-Yu No.17, was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was built by the Yuzhnoye Design Bureau, and launched in 1968 as part of the Dnepropetrovsk Sputnik programme. It had a mass of 325 kilograms (717 lb). Kosmos 257 was launched from Site 133/1 at Plesetsk, atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 3 December 1968 at 14:52:21 UTC, and resulted in Kosmos 257's successful deployment into low Earth orbit. Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1968-107A. Kosmos 257 was operated in an orbit with a perigee of 261 kilometres (162 mi), an apogee of 396 kilometres (246 mi), 70.9 degrees of inclination, and an orbital period of 91.10 minutes. It remained in orbit until it decayed and reentered the atmosphere on 5 March 1969. It was the seventeenth of seventy nine DS-P1-Yu satellites to be launched, and the sixteenth of seventy two to successfully reach orbit. (en)
  • O Kosmos 257 (em russo: Космос 257) também denominado DS-P1-Yu Nº 17, foi um satélite artificial soviético lançado ao espaço com sucesso no dia 3 de dezembro de 1968 através de um foguete Kosmos-2I a partir do Cosmódromo de Plesetsk. (pt)
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  • 1968-107A
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