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18 Vulpeculae — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/18_Vulpeculae
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-15T14:28:37.179Z
SHA-256 of the archived text: c0b573c2bdc2117aa7941838f6fead74998695641a371fda14ef2f8cc16b2bc7
Stable URL of this page: https://metraipolis.com/documento/dc_3b4efa87f1ff

How to cite

18 Vulpeculae — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/18_Vulpeculae (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_3b4efa87f1ff (Metraipolis archive dc_3b4efa87f1ff, sha256 c0b573c2bdc2117aa7941838f6fead74998695641a371fda14ef2f8cc16b2bc7)

BibTeX

@misc{dc3b4efa87f1ff,
  title = {18 Vulpeculae — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/18_Vulpeculae},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_3b4efa87f1ff; sha256 c0b573c2bdc2117aa7941838f6fead74998695641a371fda14ef2f8cc16b2bc7},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/18_Vulpeculae. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

18 Vulpeculae is a binary star system in the northern constellation of Vulpecula, located about 489 light years away from the Sun. It is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of 5.51. The system is moving closer to the Earth with a heliocentric radial velocity of −11.7 km/s. This is a double-lined spectroscopic binary system with an orbital period of 9.3 days and a small eccentricity of 0.0116. It is a detached binary with a semimajor axis of 0.14742 ± 0.00047 AU. The system contains a Delta Scuti variable, but the temperature places it to the blue (hotter) side of the δ Scuti instability strip. The AAVSO classifies it as a rotating ellipsoidal variable. The combined stellar classification of this system remains unclear, with classes of A3 III, A1 IV, A3 V, and A2 IV being given. The ultraviolet spectrum matches an A3 dwarf star. It shows no spectral peculiarities.

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 «18 Vulpeculae» — https://en.wikipedia.org/wiki/18_Vulpeculae
Wikidata Q4557537 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q4557537
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/18_Vulpeculae?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 1374779001, consultata il 2026-10-15T13:56:08.738Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 79cc10a269445946fe789549473581626d824e90438eeb1d4ccef0290785f1e5