27 Vulpeculae

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

27 Vulpeculae
Vulpecula IAU.svg
Red circle.svg
27 Vulpeculae in the constellation Vulpecula.
Observation data
Epoch J2000      Equinox J2000
Constellation Vulpecula
Right ascension 20h 37m 04.67254s[1]
Declination +26° 27′ 43.0087″[1]
Apparent magnitude (V) 5.590[2]
Characteristics
Spectral type B9 V[3][4]
B−V color index −0.050±0.004[5]
Astrometry
Radial velocity (Rv) −21.8±4.3[6] km/s
Proper motion (μ) RA: +15.25[1] mas/yr
Dec.: −11.51[1] mas/yr
Parallax (π) 10.27 ± 0.29[1] mas
Distance 318 ± 9 ly
(97 ± 3 pc)
Absolute magnitude (MV) 0.65[5]
Details
Mass 2.77±0.03[4] M
Radius 3.1[7] R
Luminosity 75.0+4.8
−4.5
[4] L
Surface gravity (log g) 3.781[8] cgs
Temperature 10,789+50
−49
[4] K
Metallicity [Fe/H] −0.27±0.04[5] dex
Rotational velocity (v sin i) 335[4] km/s
Other designations
27 Vul, BD+25° 4302, FK5 3649, HD 196504, HIP 101716, HR 7880, SAO 88903[9]
Database references
SIMBAD data

27 Vulpeculae is a single,[10] blue-white star in the northern constellation of Vulpecula. It is a dim star, visible to the naked eye, with an apparent visual magnitude of 5.59.[2] An annual parallax shift of 10.27±0.29 mas[1] provides a distance estimate of about 318 light years. It is moving closer with a heliocentric radial velocity of −22 km/s,[6] and will make perihelion passage at a distance of around 119 ly (36.56 pc) in 3.75 million years.[5]

This is a B-type main-sequence star with a stellar classification of B9 V.[3] It is spinning rapidly, showing a projected rotational velocity of 335.[4] The star has an estimated 2.77[4] times the mass of the Sun and about 3.1[7] times the Sun's radius. It is radiating 75[4] times the Sun's luminosity from its photosphere at an effective temperature of 10,789 K.[4]

References

  1. ^ a b c d e f 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.
  2. ^ a b Paunzen, E. (2015), "A new catalogue of Strömgren-Crawford uvbyβ photometry", Astronomy & Astrophysics, 580: A23, arXiv:1506.04568, Bibcode:2015A&A...580A..23P, doi:10.1051/0004-6361/201526413.
  3. ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
  4. ^ a b c d e f g h i Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
  5. ^ a b c d Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  6. ^ a b Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
  7. ^ a b Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics (Third ed.), 367: 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  8. ^ Huang, W.; Gies, D. R. (August 2008), "Stellar Rotation in Field and Cluster B Stars", The Astrophysical Journal, 683 (2), arXiv:0805.2133, Bibcode:2008ApJ...683.1045H, doi:10.1086/590106, 1045–1051.
  9. ^ "27 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-21.
  10. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.

External links

  • 27 Vulpeculae on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Retrieved from "https://en.wikipedia.org/w/index.php?title=27_Vulpeculae&oldid=838518788"
This content was retrieved from Wikipedia : http://en.wikipedia.org/wiki/27_Vulpeculae
This page is based on the copyrighted Wikipedia article "27 Vulpeculae"; it is used under the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA). You may redistribute it, verbatim or modified, providing that you comply with the terms of the CC-BY-SA