27 Vulpeculae

27 Vulpeculae
	27 Vulpeculae in the constellation Vulpecula
Observation data; Epoch J2000 Equinox J2000
Constellation	Vulpecula
Right ascension	20h 37m 04.6724s
Declination	+26° 27′ 43.006″
Apparent magnitude (V)	5.590
Characteristics
Spectral type	B9 V
B−V color index	−0.050±0.004
Astrometry
Radial velocity (Rv)	−21.8±4.3 km/s
Proper motion (μ)	RA: 15.349±0.042 mas/yr ; Dec.: −11.775±0.040 mas/yr
Parallax (π)	10.6692±0.0483 mas
Distance	306 ± 1 ly ; (93.7 ± 0.4 pc)
Absolute magnitude (MV)	0.65
Details
Mass	2.77±0.03 M☉
Radius	3.1 R☉
Luminosity	75.0+4.8; −4.5 L☉
Surface gravity (log g)	3.781 cgs
Temperature	10,789+50; −49 K
Metallicity [Fe/H]	−0.27±0.04 dex
Rotational velocity (v sin i)	335 km/s
Other designations
	27 Vul, BD+25° 4302, FK5 3649, HD 196504, HIP 101716, HR 7880, SAO 88903
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

^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ ^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, S2CID 73623700.
^ ^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
^ ^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, S2CID 55586789.
^ ^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, S2CID 119257644.
^ ^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, S2CID 119231169.
^ ^a ^b Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics, 367 (Third ed.): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
^ Huang, W.; Gies, D. R. (August 2008), "Stellar Rotation in Field and Cluster B Stars", The Astrophysical Journal, 683 (2): 1045–1051, arXiv:0805.2133, Bibcode:2008ApJ...683.1045H, doi:10.1086/590106, S2CID 18926523, 1045–1051.
^ "27 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-21.
^ 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, S2CID 14878976.

External links

27 Vulpeculae on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

[Gaia_EDR3-1] ^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[Paunzen2015-2] 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, S2CID 73623700.

[Cowley1969-3] 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

[Zorec2012-4] ^ ^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, S2CID 55586789.

[Anderson2012-5] 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, S2CID 119257644.

[Gontcharov2006-6] 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, S2CID 119231169.

[cadars2001-7] Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics, 367 (Third ed.): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.

[Huang2008-8] Huang, W.; Gies, D. R. (August 2008), "Stellar Rotation in Field and Cluster B Stars", The Astrophysical Journal, 683 (2): 1045–1051, arXiv:0805.2133, Bibcode:2008ApJ...683.1045H, doi:10.1086/590106, S2CID 18926523, 1045–1051.

[SIMBAD-9] "27 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-21.

[Eggleton2008-10] 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, S2CID 14878976.

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Observation data Epoch J2000 Equinox J2000
27 Vulpeculae in the constellation Vulpecula
Constellation	Vulpecula
Right ascension	20^h 37^m 04.6724^s^[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 (R_v)	−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 mas^[1]
Distance	306 ± 1 ly (93.7 ± 0.4 pc)
Absolute magnitude (M_V)	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