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GS 2000+25 ❍｜Definition｜1st｜20260912203812-00-⌔

GS 2000+25 - Wikipedia

GS 2000+25

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GS 2000+25 is an X-ray binary system in the constellation Vulpecula, consisting of a late K-type star and a black hole. It is also an X-ray nova.

Fumiyoshi Makino and the Ginga satellite team discovered GS 2000+25, in April 1988.1 A few days later a star, variable in visible light, was identified at its position.2 It received its variable star designation, QZ Vulpeculae, in 1989.3

Printed 2026-09-12.

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Footnotes

  1. Marsden, Brian G. (28 April 1988). “X-Ray Sources”. IAU Circular. 4587: 1. Retrieved 16 April 2025. ↩

  2. Marsden, Brian G. (4 May 1988). “X-Ray Nova in Vulpecula”. IAU Circular. 4589: 1. Retrieved 16 April 2025. ↩

  3. Kholopov, P. N.; Samus, N. N.; Kazarovets, B. V.; Frolov, M. S.; Kireeva, N. N. (April 1989). “The 69th Name-List of Variable Stars”. Information Bulletin on Variable Stars. 3323: 1–20. Bibcode:1989IBVS.3323…1K. Retrieved 16 April 2025. ↩

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GS 2000+25 ❍｜SIMBAD｜1st｜20260912213633-00-●

GS 2000+25 (Retrieved 2026-09-12.)
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