Alpha Vulpeculae

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Alpha Vulpeculae
Vulpecula IAU.svg
Cercle rouge 100%.svg

Location of α Vulpeculae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vulpecula
Right ascension 19h 28m 42.330s[1]
Declination +24° 39′ 53.65″[1]
Apparent magnitude (V) 4.44
Characteristics
Spectral type M0III
Astrometry
Proper motion (μ) RA: –126.13 ± 0.19[1] mas/yr
Dec.: –107.44 ± 0.22[1] mas/yr
Parallax (π) 10.97 ± 0.28[1] mas
Distance 297 ± 8 ly
(91 ± 2 pc)
Absolute magnitude (MV) –0.36
Other designations
Anser, α Vulpeculae, α Vul, Alpha Vul, 6 Vulpeculae, BD+24 3759, CCDM J19288+2442A, FK5 1508, HD 183439, HIP 95771, HR 7405, IDS 19245+2427 A, SAO 87261, WDS J19287+2440A.[2]

Alpha Vulpeculae (Alpha Vul, α Vulpeculae, α Vul) is the brightest star in the constellation Vulpecula. It has a traditional name, variously represented as Lukida, Lucida Anseris, or Anser, a tradition kept from when the constellation had the name Vulpecula et Anser 'the fox and the goose'.

Alpha Vulpeculae is a red giant of spectral class M0 and has apparent magnitude +4.44. It is approximately 297 light years from Earth. It forms a wide optical binary with 8 Vulpeculae.

It has been analysed as a member of the Arcturus stream, a group of stars with high proper motion and metal-poor properties thought to be the remnants of a small galaxy consumed by the Milky Way.[3]

Amateur image of LDN 778 (center) and Alpha Vulpeculae, (red giant, top center).

See also[edit]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ "HD 20781 -- High proper-motion Star". SIMBAD Astronomical Database. Centre de données astronomiques de Strasbourg. Retrieved 2014-09-13. 
  3. ^ Eggen, Olin (1971). "The Arcturus Group". Publications of the Astronomical Society of the Pacific 83 (493): 271–85. Bibcode:1971PASP...83..271E. doi:10.1086/129120. [dead link]

External links[edit]