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18 Andromedae — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/18_Andromedae
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-15T14:09:10.995Z
SHA-256 of the archived text: ace80d3a61ca4d4cc31691696fcc856a72f1d0b5eb044a66339910ad4cbda58b
Stable URL of this page: https://metraipolis.com/documento/dc_1dfe7dc2faeb

How to cite

18 Andromedae — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/18_Andromedae (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_1dfe7dc2faeb (Metraipolis archive dc_1dfe7dc2faeb, sha256 ace80d3a61ca4d4cc31691696fcc856a72f1d0b5eb044a66339910ad4cbda58b)

BibTeX

@misc{dc1dfe7dc2faeb,
  title = {18 Andromedae — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/18_Andromedae},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_1dfe7dc2faeb; sha256 ace80d3a61ca4d4cc31691696fcc856a72f1d0b5eb044a66339910ad4cbda58b},
  year = {2026}
}

Archived text

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

18 Andromedae, abbreviated 18 And, is a single star in the northern constellation of Andromeda. 18 Andromedae is the Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 5.350. The annual parallax shift of 7.8 mas can be used to estimate a distance of 419 light years. It is moving further from the Earth with a heliocentric radial velocity of +10 km/s. This is a B-type main-sequence star with a stellar classification of B9 Ve, where the 'e' notation indicates this is a Be star. The stellar spectrum of 18 And displays an emission line in the hydrogen Brackett series due to a dense gaseous circumstellar envelope. The star is spinning rapidly with a projected rotational velocity of 183 km/s and has about three times the mass of the Sun. It is radiating 147 times the Sun's luminosity from its photosphere at an effective temperature of 10,351 K. The star has about 3.61 times the radius of the Sun.

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 Andromedae» — https://en.wikipedia.org/wiki/18_Andromedae
Wikidata Q1748048 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q1748048
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/18_Andromedae?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 1339200907, consultata il 2026-10-15T13:51:18.036Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 7278bd547a863aa8fe1094179d11c1929beb5e680e5b2d3ac965337e59626e36