11 Camelopardalis

Star in the constellation Camelopardalis 250px A light curve for BV Camelopardalis, plotted from Hipparcos data J2000.0 Camelopardalis 05 06 08.45273 +58 58 20.5432 5.08 B3 Ve −0.080 Be −6.264 −7.118 4.7543 0.1224 −1.38 6.0 1.2 7.87 4.00 0.35 1766 131 122 commas 17240 560 commas 95 6 25 3 BV Cam 11 Cam +58°804 32343 23734 1622 25001 6193 2480 05062+5900 J05061+5858A 11+Cam thumb|left|11 Camelopardalis and its reddish companion 12 Camelopardalis 11 Camelopardalis is a single star in the northern circumpolar constellation of Camelopardalis, located around 690 light years away from the Sun as determined by parallax. It has the variable star designation BV Camelopardalis; 11 Camelopardalis is the Flamsteed designation. This object is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of +5.22. It forms a double star with 12 Camelopardalis, which is only 3 arcminutes away. This is a main sequence Be star with a stellar classification of B3 Ve. John R. Percy et al. discovered that 11 Camelopardalis is a variable star in 1979, and published that finding in 1981. It was given its variable star designation in 1987. Samus et al. (2017) classify it as a Be variable, rather than a Gamma Cassiopeiae type, and it ranges from a peak Hipparcos magnitude of 5.10 down to 5.22. The star is spinning with a projected rotational velocity of 95 km/s, but is being viewed from an extreme pole-on position. Hence it is spinning much more rapidly than indicated. Outbursts of hydrogen emission lines have been observed, as well as rapid changes in hydrogen line profiles. It is 25 million years old with around six times the mass of the Sun. References 283924349317110400 11 Cam 2019-04-15 Hipparcos Tools Interactive Data Access https://www.cosmos.esa.int/web/hipparcos/interactive-data-access Hipparcos ESA 8 December 2021 Kholopov P. N. Samus N. N. Kazarovets E. V. Kireeva N. N. The 68th Name-List of Variable Stars Information Bulletin on Variable Stars August 1987 3058 1 1987IBVS.3058....1K https://ibvs.konkoly.hu/pub/ibvs/3001/3058.pdf 29 December 2024 . https://www.aavso.org/vsx/index.php?view=detail.top&oid=4632 BV Cam International Variable Star Index AAVSO 2022-07-26 Percy J. R. Jakate S. M. Matthews J. M. Short-period light variations in Be stars Astronomical Journal January 1981 86 53–61 10.1086/112855 1981AJ.....86...53P https://articles.adsabs.harvard.edu/pdf/1981AJ.....86...53P 29 December 2024 XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 1108.4971 119257644 . Critical study of the distribution of rotational velocities of Be stars. I. Deconvolution methods, effects due to gravity darkening, macroturbulence, and binarity Astronomy & Astrophysics 1 Zorec J. Frémat Y. Domiciano de Souza A. Royer F. Cidal L. Hubert A. -M. Seemann T. Martayan C. Cochetti Y. R. Arias M. L. Aidelman Y. Stee P. 595 November 2016 26 2016A&A...595A.132Z . 10.1051/0004-6361/201628760 free 11336/37946 free 1 Eggleton P. P. Tokovinin A. A. A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869–879 September 2008 10.1111/j.1365-2966.2008.13596.x free . 2008MNRAS.389..869E 0806.2878 14878976 1 Tetzlaff N. Neuhäuser R. Hohle M. M. A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun Monthly Notices of the Royal Astronomical Society 410 1 190–200 January 2011 10.1111/j.1365-2966.2010.17434.x free . 2011MNRAS.410..190T 1007.4883 118629873 1 Hα echelle spectroscopy of Be stars: an atlas. Ballereau D. Alvarez M. Chauville J. Michel R. Revista Mexicana de Astronomía y Astrofísica 15 1 29–52 May 1987 1987RMxAA..15...29B . Slettebak A. Spectral types and rotational velocities of the brighter Be stars and A-F type shell stars Astrophysical Journal Supplement Series 50 55 1982 . 1982ApJS...50...55S 10.1086/190820 free 1 Samus N. N. Kazarovets E. V. Durlevich O. V. Kireeva N. N. Pastukhova E. N. General Catalogue of Variable Stars 5.1 Astronomy Reports 2017 61 1 80–88 2017ARep...61...80S . 10.1134/s1063772917010085 125853869 2022A&A...657A...7K Stellar and substellar companions from Gaia EDR3. Proper-motion anomaly and resolved common proper-motion pairs Kervella Pierre Arenou Frédéric Thévenin Frédéric Astronomy and Astrophysics 2022 657 657 10.1051/0004-6361/202142146 free 2109.10912 237605138 Category:Be stars Category:B-type main-sequence stars Category:Gamma Cassiopeiae variables Camelopardalis, BV Category:Double stars Category:Camelopardalis Camelopardalis, 11 Category:Durchmusterung objects 032343 023734 1622