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{{Starbox begin
| name = 25 Vulpeculae
}}{{Starbox observe
| epoch = J2000.0
| constell = Vulpecula
| ra = {{RA|20|22|03.43076}}
| dec = {{DEC|+24|26|45.9526}}
| appmag_v = 5.50[3]
}}{{Starbox character
| type =
| class = B6 IVe[4][5]
| b-v = {{Val|−0.09|0.02}}[5]
| u-b =
| variable =
}}{{Starbox astrometry
| radial_v = {{Val|−11.0|3.6}}[7]
| prop_mo_ra = +0.605
| prop_mo_dec = −5.732
| parallax = 2.7932
| p_error = 0.1493
| parallax_footnote =
| absmag_v = −1.88[5]
}}{{Starbox detail
| mass =
| radius =
| gravity = {{Val|3.52|0.21}}[12]
| luminosity_bolometric = {{Val|1345|215|184|fmt=commas}}[12]
| temperature = {{Val|13170|330|fmt=commas}}[12]
| metal_fe =
| rotational_velocity = {{Val|160|14}}[12]
| age_gyr =
}}{{Starbox catalog
| names = {{odlist | F=25 Vul | BD=+23°3986 | HD=193911 | HIP=100435 | HR=7789 | SAO=88580 }}[16]
}}{{Starbox reference
| Simbad = 25+Vulpeculae
}}{{Starbox end}}25 Vulpeculae is a single[3] star in the northern constellation of Vulpecula, located roughly 1,170 light years away from the Sun. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.50[3] This is a Be star with a stellar classification of B6 IVe,[4] matching the spectrum of an aging subgiant. Cowley (1972) had it rated as a more evolved giant star with a class of B8 IIIn,[20] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It has a high rate of spin, showing a projected rotational velocity of 160 km/s.[12]References1. ^1 {{cite simbad | title=25 Vulpeculae | access-date=2019-03-16 }}
2. ^1 2 3 {{citation | postscript=. | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | arxiv=1108.4971 | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 }}
3. ^1 2 {{citation | last1=Slettebak | first1=A. | postscript=. | title=Spectral types and rotational velocities of the brighter Be stars and A-F type shell stars | journal=Astrophysical Journal Supplement Series | volume=50 | pages=55–83 | year=1982 | bibcode=1982ApJS...50...55S | doi=10.1086/190820 }}
4. ^1 2 3 4 5 {{citation | title=Critical study of the distribution of rotational velocities of Be stars. I. Deconvolution methods, effects due to gravity darkening, macroturbulence, and binarity | journal=Astronomy & Astrophysics | display-authors=1 | last1=Zorec | first1=J. | last2=Frémat | first2=Y. | last3=Domiciano de Souza | first3=A. | last4=Royer | first4=F. | last5=Cidal | first5=L. | last6=Hubert | first6=A. -M. | last7=Seemann | first7=T. | last8=Martayan | first8=C. | last9=Cochetti | first9=Y. R. | last10=Arias | first10=M. L. | last11=Aidelman | first11=Y. | last12=Stee | first12=P. | volume=595 | date=November 2016 | pages=26 | bibcode=2016A&A...595A.132Z | postscript=. }}
5. ^1 2 3 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | year=2008 | arxiv=0806.2878 | bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x | postscript=. }}
6. ^1 {{citation | last1=Cowley | first1=A. | title=Spectral classification of the bright B8 stars | journal=Astronomical Journal | postscript=. | volume=77 | pages=750–755 | date=November 1972 | doi=10.1086/111348 | bibcode=1972AJ.....77..750C }}
7. ^1 {{citation | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32| issue=11| pages=759–771| date=November 2006 | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G | arxiv=1606.08053 | postscript=. }}
}}External links{{Sky|20|22|03.4|+|24|26|46|1801.9662}}{{Stars of Vulpecula}}{{DEFAULTSORT:Vulpeculae, 25}} 9 : B-type subgiants|B-type giants|Vulpecula|Durchmusterung objects|Flamsteed objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects|Be stars |