27 Vulpeculae

Star in the constellation Vulpecula

27 Vulpeculae

27 Vulpeculae in the constellation Vulpecula

Observation data
Epoch J2000 Equinox J2000
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 mas[1]
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
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 10.6692±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

[edit]

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.
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, S2CID 73623700.
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, S2CID 55586789.
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, S2CID 119257644.
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, S2CID 119231169.
7. ^ 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.
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.
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, S2CID 14878976.

## External links

[edit]

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

* v
* t
* e

Constellation of Vulpecula

* List of stars in Vulpecula
* Vulpecula in Chinese astronomy

Stars|

| Bayer|

* α (Anser)

|

Flamsteed|

* 1
* 2
* 3
* 4
* 5
* 7
* 8
* 9
* 10
* 11
* 12
* 13
* 14
* 15
* 16
* 17
* 18
* 19
* 20
* 21
* 22
* 23
* 24
* 25
* 26
* 27
* 28
* 29
* 30
* 31
* 32
* 33
* 35

Variable|

* S
* T
* U
* SV
* BW
* ER
* LV
* NQ
* NR
* PU
* QQ
* QR
* QU
* V452
* V457

HD|

* 184010
* 188015
* 190228

Other|

* ASKAP J1935+2148
* G 185-32
* GS 2000+25
* HIP 100963
* PSR B1919+21
* PSR B1937+21
* PSR J1946+2052
* PSR J2007+2722
* Wolf 1346
* SGR 1935+2154

| Exoplanets|

* HD 188015 b
* HD 189733 b

|

| Star clusters|

* Brocchi's Cluster
* NGC 6885
* NGC 6940

|

| Nebulae|

* Dumbbell Nebula
* Hen 2-437
* Sh2-88

|

Galaxies|

| NGC|

* 7052
* 7080

|

Other|

* 3C 433

| Astronomical events|

* AT 2021lwx

|

Category
*[RA:]: Right Ascension
*[Dec.:]: Declination
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*[t]: Discuss this template
*[e]: Edit this template