[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/hd-192685-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki24\/hd-192685-wikipedia\/","headline":"HD 192685 – Wikipedia","name":"HD 192685 – Wikipedia","description":"From Wikipedia, the free encyclopedia B-type star in the constellation Vulpecula HD 192685 Location of HD 192685 (circled) Observation dataEpoch","datePublished":"2014-11-15","dateModified":"2014-11-15","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/9\/94\/Vulpecula_constellation_map.svg\/280px-Vulpecula_constellation_map.svg.png","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/9\/94\/Vulpecula_constellation_map.svg\/280px-Vulpecula_constellation_map.svg.png","height":"218","width":"280"},"url":"https:\/\/wiki.edu.vn\/en\/wiki24\/hd-192685-wikipedia\/","wordCount":5012,"articleBody":"From Wikipedia, the free encyclopediaB-type star in the constellation VulpeculaHD 192685Location of HD 192685 (circled)Observation dataEpoch J2000\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Equinox J2000ConstellationVulpeculaRight ascension20h 15m 15.89542s[1]Declination25\u00b0\u00a035\u2032\u00a031.0549\u2033[1]Apparent\u00a0magnitude\u00a0(V)4.60 – 4.80[2]CharacteristicsSpectral\u00a0typeB3V[3]U\u2212B color index\u22120.73[4]B\u2212V color index\u22120.18[4]Variable\u00a0type\u03b3 Cas[2]AstrometryRadial velocity (Rv)\u22127.00[5]\u00a0km\/sProper motion (\u03bc) RA:\u00a0+6.93[1]\u00a0mas\/yr Dec.:\u00a0\u22123.89[1]\u00a0mas\/yr Parallax (\u03c0)3.29\u00a0\u00b1\u00a00.51\u00a0mas[1]Distanceapprox. 1,000\u00a0ly (approx. 300\u00a0pc)Absolute\u00a0magnitude\u00a0(MV)\u22122.56[6]DetailsMass8.0[7]\u00a0M\u2609Luminosity3331[6]\u00a0L\u2609Surface gravity (log\u00a0g)3.49[8]\u00a0cgsTemperature18,700[9]\u00a0KMetallicity [Fe\/H]\u22120.10[8]\u00a0dexRotational velocity (v\u00a0sin\u00a0i)160[10]\u00a0km\/sOther designations QR Vul, BD+25\u00b04165, CCDM\u00a0J20153+2536AB, GC\u00a028140, HIP\u00a099824, HR\u00a07739, HD\u00a0192685, SAO\u00a088410, WDS\u00a0J20153+2536AB Database referencesSIMBADdataHD 192685, also known as QR Vulpeculae or HR 7739, is a Be star about 1,000 ly away in the Vulpecula constellation. It is visible to the naked eye.Table of ContentsDescription[edit]Companions[edit]References[edit]External links[edit]Description[edit]  The main plot is a visual band light curve for QR Vulpeculae, adapted from Pavlovski et al. (1983),[11] showing a sudden brightening. The inset plot, adapted from Lef\u00e8vre et al. (2009),[12] shows the periodic variability.HD 192685 varies slightly in brightness and is classified as a \u03b3 Cassiopeiae variable.[2]From October to December 1982 the Hydrogen alpha absorption line increased in emission strength by 30%.[11]  The line is partially filled by redshifted emission.[13]HD 192685 has excess infrared emissions (12-100 \u03bcm) which are interpreted to be free-free radiation in the gas surrounding the star.[14]Companions[edit]It has at least one companion with separation 0.55″ and magnitude 7.55,[15] and may also be a long-period spectroscopic binary.[16]References[edit]^ a b c d e Van Leeuwen, F. (2007). “Validation of the new Hipparcos reduction”. Astronomy and Astrophysics. 474 (2): 653\u2013664. arXiv:0708.1752. Bibcode:2007A&A…474..653V. doi:10.1051\/0004-6361:20078357. S2CID\u00a018759600. Vizier catalog entry^ a b c Samus, N. N.; Durlevich, O. V.;  et\u00a0al. (2009). “VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)”. VizieR On-line Data Catalog: B\/GCVS. Originally Published in: 2009yCat….102025S. 1. Bibcode:2009yCat….102025S.^ Walker, G. A. H.; Yang, S.; Witt, A. N.; Fahlman, G. G. (Aug\u2013Sep 1980). “The extinction of HD 200775 by dust in NGC 7023”. Publications of the Astronomical Society of the Pacific. 92: 414. Bibcode:1980PASP…92..411W. doi:10.1086\/130687.^ a b Mermilliod, J. C. (2006). “VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)”. VizieR On-line Data Catalog: II\/168. Originally Published in: Institut d’Astronomie. 2168. Bibcode:2006yCat.2168….0M.Vizier catalog entry^ Gontcharov, G. A. (2006). “Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system”. Astronomy Letters. 32 (11): 759\u2013771. arXiv:1606.08053. Bibcode:2006AstL…32..759G. doi:10.1134\/S1063773706110065. S2CID\u00a0119231169.^ a b 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\u00a0119257644. Vizier catalog entry^ Tetzlaff, N.; Neuh\u00e4user, R.; Hohle, M. M. (2011). “A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun”. Monthly Notices of the Royal Astronomical Society. 410 (1): 190\u2013200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111\/j.1365-2966.2010.17434.x. S2CID\u00a0118629873. Vizier catalog entry^ a b Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). “Coud\u00e9-feed stellar spectral library \u2013 atmospheric parameters”. Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A…525A..71W. doi:10.1051\/0004-6361\/201015014. S2CID\u00a053480665.^ Hohle, M.M.; Neuh\u00e4user, R.; Schutz, B.F. (2010). “Masses and luminosities of O- and B-type stars and red supergiants”. Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335. Bibcode:2010AN….331..349H. doi:10.1002\/asna.200911355. S2CID\u00a0111387483. Vizier catalog entry^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). “Rotational Velocities of B Stars”. The Astrophysical Journal. 573 (1): 359\u2013365. Bibcode:2002ApJ…573..359A. doi:10.1086\/340590.^ a b Pavlovski, K.; Bozic, H.; Harmanec, P.; Horn, J.; Koubsky, P. (14 November 1983). “Sudden Brightening of the Recently Discovered Be Star HR 7739”. Information Bulletin on Variable Stars. 2431 (1): 1. Bibcode:1983IBVS.2431….1P. ISSN\u00a00374-0676.^ Lef\u00e8vre, L.; Marchenko, S. V.; Moffat, A. F. J.; Acker, A. (November 2009). “A systematic study of variability among OB-stars based on HIPPARCOS photometry”. Astronomy and Astrophysics. 507 (2): 1141\u20131201. Bibcode:2009A&A…507.1141L. doi:10.1051\/0004-6361\/200912304.^ Green, Daniel W. E. (July 14, 1982). “2 Vul AND HR 7739”. IAU Circular. IAU Central Bureau for Astronomical Telegrams. 3710. Retrieved 11 December 2012.^ Cote, J. (July 1987). “B and A type stars with unexpectedly large colour excesses at IRAS wavelengths”. Astronomy and Astrophysics. 181 (1): 83. Bibcode:1987A&A…181…77C. ISSN\u00a00004-6361.^ Eggleton, P. P.; Tokovinin, A. A. (2008). “A catalogue of multiplicity among bright stellar systems”. Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111\/j.1365-2966.2008.13596.x. S2CID\u00a014878976. Vizier catalog entry^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). “The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog”. The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ….122.3466M. doi:10.1086\/323920. Vizier catalog entryExternal links[edit]  "},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/hd-192685-wikipedia\/#breadcrumbitem","name":"HD 192685 – Wikipedia"}}]}]