Astronomy:27 Vulpeculae
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| 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 | |
| Evolutionary stage | main sequence[1][3] |
| Spectral type | B9 V[4][3] |
| 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[3] M☉ |
| Radius | 3.1[7] R☉ |
| Luminosity | 75.0+4.8 −4.5[3] L☉ |
| Surface gravity (log g) | 3.781[8] cgs |
| Temperature | 10,789+50 −49[3] K |
| Metallicity [Fe/H] | −0.27±0.04[5] dex |
| Rotational velocity (v sin i) | 335[3] 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.[4] It is spinning rapidly, showing a projected rotational velocity of 335.[3] The star has an estimated 2.77[3] times the mass of the Sun and about 3.1[7] times the Sun's radius. It is radiating 75[3] times the Sun's luminosity from its photosphere at an effective temperature of 10,789 K.[3]
BD Vulpeculae
The location of the reddish colored carbon star BD Vulpeculae (CCCS 2916 / CGCS 4915) is, as seen from Earth, immediately northeast of 27 Vulpeculae. Astronomers and amateur astronomers could use 27 Vulpeculae as guidestar to try to find BD Vulpeculae and to see the color contrast of the bluish white star 27 Vulpeculae and the nearby reddish carbon star.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 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.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 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.
- ↑ 4.0 4.1 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
- ↑ 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
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