Astronomy:27 Vulpeculae
  | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Vulpecula |
| Right ascension | 20h 37m 04.6724s[1] |
| Declination | +26° 27′ 43.006″[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: 15.349±0.042[1] mas/yr Dec.: −11.775±0.040[1] mas/yr |
| Parallax (π) | 10.6692 ± 0.0483[1] mas |
| Distance | 306 ± 1 ly (93.7 ± 0.4 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 | |
| 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 10.6692±0.0483 mas[1] provides a distance estimate of about 306 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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 2.0 2.1 Paunzen, E. (2015), "A new catalogue of Strömgren-Crawford uvbyβ photometry", Astronomy & Astrophysics 580: A23, doi:10.1051/0004-6361/201526413, Bibcode: 2015A&A...580A..23P.
- ↑ 3.0 3.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 5.0 5.1 5.2 5.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G.
- ↑ 7.0 7.1 Pasinetti Fracassini, L. E. et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics 367: 521–24, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ Huang, W.; Gies, D. R. (August 2008), "Stellar Rotation in Field and Cluster B Stars", The Astrophysical Journal 683 (2): 1045–1051, doi:10.1086/590106, 1045–1051, Bibcode: 2008ApJ...683.1045H.
- ↑ "27 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=27+Vul.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
External links
- 27 Vulpeculae on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
 |  |
