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1 Pegasi — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/1_Pegasi
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-01T08:24:37.289Z
SHA-256 of the archived text: 3e36a1eefd2691bbec21003dc0a2f1e2bf8d5d0eaf66dd4b5b9a0bf994ca3146
Stable URL of this page: https://metraipolis.com/documento/dc_320d98b92c41

How to cite

1 Pegasi — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/1_Pegasi (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_320d98b92c41 (Metraipolis archive dc_320d98b92c41, sha256 3e36a1eefd2691bbec21003dc0a2f1e2bf8d5d0eaf66dd4b5b9a0bf994ca3146)

BibTeX

@misc{dc320d98b92c41,
  title = {1 Pegasi — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/1_Pegasi},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_320d98b92c41; sha256 3e36a1eefd2691bbec21003dc0a2f1e2bf8d5d0eaf66dd4b5b9a0bf994ca3146},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/1_Pegasi. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

1 Pegasi (1 Peg) is a triple star system in the constellation Pegasus, located approximately 156 light years away from the Sun based on parallax. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.09. The system is moving closer to the Earth with a heliocentric radial velocity of −11 km/s. The primary component is a giant with a stellar classification of K1III, a star that has exhausted the hydrogen supply at its core and evolved away from the main sequence. Estimated to be two billion years old, 1 Pegasi has 1.6 times the mass of the Sun and has expanded to twelve times the Sun's radius. The star is radiating 64 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,725 K. There are several companions in addition to the primary. The brightest, component B, is a magnitude 9.3, K-type main-sequence star with a class of K0 V orbiting at an angular separation of 36.6" from the primary; it is itself a single-lined spectroscopic binary with an orbital period of 3.042 ± 0.011 years and eccentricity of 0.290±0.022. Visual companions C, with magnitude 12.9 and separation 64.7", and D, with magnitude 9.6 and separation 5.3", have been reported. 1 Pegasi is the brightest star in Pegasus that does not have a Bayer designation, although it is brighter than several stars in Pegasus that do such as τ, φ, and σ Pegasi, perhaps because it was included as the brightest star in the constellation Battery of Volta, made by Thomas Young. It is the first star numbered by Flamsteed in order of right ascension. In the 1795 French-language Fortin-Flamsteed edition of the Atlas Coelestis, 1 Pegasi is labelled with the letter "e".

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 «1 Pegasi» — https://en.wikipedia.org/wiki/1_Pegasi
Wikidata Q2743705: «stella nella costellazione di Pegaso» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q2743705
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/1_Pegasi?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 1370770327, consultata il 2026-11-01T08:16:27.805Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 1f7e2e15af6fc0463d9ea66480ec08a1422f0d284b4b948e58166a23c55c9f62