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27 Hydrae — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/27_Hydrae
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-06T11:57:56.100Z
SHA-256 of the archived text: 35c652bbdfffff0ae7e1a0541661346970a6663460bd6434a24955554de39f5c
Stable URL of this page: https://metraipolis.com/documento/dc_9ff238acbbfc

How to cite

27 Hydrae — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/27_Hydrae (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_9ff238acbbfc (Metraipolis archive dc_9ff238acbbfc, sha256 35c652bbdfffff0ae7e1a0541661346970a6663460bd6434a24955554de39f5c)

BibTeX

@misc{dc9ff238acbbfc,
  title = {27 Hydrae — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/27_Hydrae},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_9ff238acbbfc; sha256 35c652bbdfffff0ae7e1a0541661346970a6663460bd6434a24955554de39f5c},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/27_Hydrae. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

27 Hydrae is a triple star system in the equatorial constellation of Hydra, located 222 light years away from the Sun. It is visible to the naked eye as a faint, orange-hued star with a combined apparent visual magnitude of 4.82. The system is moving further from the Earth with a heliocentric radial velocity of +25.6 km/s. The magnitude 4.91 primary, component A, is an aging giant star with a stellar classification of K0 III. It is a red clump giant, which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. The star is 1.9 billion years old with 2.17 times the mass of the Sun. It has swelled to 11 times the Sun's radius and is radiating 57.5 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,965 K. The star is suspected to host a low-mass companion. The stellar companions to this star, designated components B and C, lie at an angular separation of 229.10″ from the primary, and form a binary pair with a separation of 9.20″ as of 2015. The brighter member of the pair, component B, is a seventh magnitude F-type main-sequence star with a class of F4 V, while its companion is an eleventh magnitude K-type main-sequence star with a class of K2 V.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «27 Hydrae» — https://en.wikipedia.org/wiki/27_Hydrae
Wikidata Q5175237: «stella nella costellazione dell'Idra» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q5175237
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/27_Hydrae?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1377637432, consultata il 2026-11-06T11:54:02.405Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 92273e34a1f2b169626df6c84a602a165cfbbab2b8aaddced92162b352172a50