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{{Starbox short
{{Starbox begin
|name = HD 192685
| name = HD 192685
⚫
|epoch = [[J2000.0]]
| ra = {{RA|20|15|15.90}}
⚫
| dec = {{DEC|+25|35|31.0}}
| appmag_v = 4.78
| dist_ly =1,199
| dist_pc = 368
⚫
|constell = [[Vulpecula]]
⚫
|spectral = B3V<ref name="Walker">{{cite journal|last=Walker|first=G. A. H.,|author2=Yang, S. |author3=Witt, A. N. |author4=Fahlman, G. G. |date=Aug–Sep 1980|title=The extinction of HD 200775 by dust in NGC 7023|journal=Publications of the Astronomical Society of the Pacific|volume=92|page=414|url=http://articles.adsabs.harvard.edu//full/1980PASP...92..411W/0000414.000.html |doi=10.1086/130687|bibcode = 1980PASP...92..411W }}</ref>
⚫
| Simbad = HD 192685
}}
}}
{{Starbox image
|image=
{{Location mark
|image=Vulpecula constellation map.svg|alt=|float=center|width=280
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=HD 192685
|x=480|y=376
}}
|caption=Location of HD 192685 (circled)
}}
{{Starbox observe
⚫
| epoch = J2000
⚫
| constell = [[Vulpecula (constellation)|Vulpecula]]
| ra = {{RA|20|15|15.89542}}<ref name=vanLeeuwen2007>{{cite journal | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653 | year=2007 | last1=Van Leeuwen | first1=F. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2099824 Vizier catalog entry]</ref>
⚫
| dec = {{DEC|25|35|31.0549}}<ref name=vanLeeuwen2007/>
| appmag_v = 4.79<ref name=XHIP>{{cite journal | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | first1=E. | last2=Francis | first2=Ch. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=99824 Vizier catalog entry]</ref>
}}
{{Starbox character
⚫
| class = B3V<ref name="Walker">{{cite journal|last=Walker|first=G. A. H.,|author2=Yang, S. |author3=Witt, A. N. |author4=Fahlman, G. G. |date=Aug–Sep 1980|title=The extinction of HD 200775 by dust in NGC 7023|journal=Publications of the Astronomical Society of the Pacific|volume=92|page=414|url=http://articles.adsabs.harvard.edu//full/1980PASP...92..411W/0000414.000.html |doi=10.1086/130687|bibcode = 1980PASP...92..411W }}</ref>
| b-v = -0.18<ref name=MermiliodUBV>{{cite journal | bibcode=2006yCat.2168....0M | title=VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991) | journal=VizieR On-line Data Catalog: II/168. Originally published in: Institut d'Astronomie | volume=2168 | author1=Mermilliod | first1=J. C. | year=2006 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=II/168/ubvmeans&LID=%2B100192685 Vizier catalog entry]</ref>
| u-b = -0.73<ref name=MermiliodUBV/>
}}
{{Starbox astrometry
| radial_v = -7.00<ref name=Gontcharov2006>{{Cite journal | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system| journal=Astronomy Letters| volume=32| issue=11| pages=759| year=2006| last1=Gontcharov| first1=G. A.}}</ref>
| prop_mo_ra = +6.93<ref name=vanLeeuwen2007/>
| prop_mo_dec = -3.89<ref name=vanLeeuwen2007/>
| parallax = 3.29
| p_error = 0.51
| parallax_footnote = <ref name=vanLeeuwen2007/>
| absmag_v = -2.56<ref name=XHIP/>
}}
{{Starbox detail
| mass = 8.0<ref name=Tetzlaff2011>{{cite journal | bibcode=2011MNRAS.410..190T | doi=10.1111/j.1365-2966.2010.17434.x | arxiv=1007.4883 | title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun | journal=Monthly Notices of the Royal Astronomical Society | volume=410 | pages=190 | year=2011 | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/MNRAS/410/190/table1&HIP=99824 Vizier catalog entry]</ref>
| temperature = 18,700<ref name=Hohle2010>{{cite journal | bibcode=2010AN....331..349H | doi=10.1002/asna.200911355 | arxiv=1003.2335 | title=Masses and luminosities of O- and B-type stars and red supergiants | journal=Astronomische Nachrichten | volume=331 | issue=4 | pages=349 | year=2010 | last1=Hohle | first1=M.M. | last2=Neuhäuser | first2=R. | last3=Schutz | first3=B.F. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/AN/331/349/single&HIP=99824 Vizier catalog entry]</ref>
| luminosity = 3331<ref name=XHIP/>
| rotational_velocity = 160<ref name=Abt2002>{{cite journal | bibcode=2002ApJ...573..359A | doi=10.1086/340590 | title=Rotational Velocities of B Stars | journal=The Astrophysical Journal | volume=573 | pages=359 | year=2002 | last1=Abt | first1=Helmut A. | last2=Levato | first2=Hugo | last3=Grosso | first3=Monica }}</ref>
| gravity = 3.49<ref name=Wu2011>{{cite journal | bibcode=2011A&A...525A..71W | doi=10.1051/0004-6361/201015014 | arxiv=1009.1491 | title=Coudé-feed stellar spectral library – atmospheric parameters | journal=Astronomy & Astrophysics | volume=525 | pages=A71 | year=2010 | last1=Wu | first1=Yue | last2=Singh | first2=H. P. | last3=Prugniel | first3=P. | last4=Gupta | first4=R. | last5=Koleva | first5=M. }}</ref>
| metal_fe = -0.10<ref name=Wu2011/>
}}
{{Starbox catalog
| names = [[Catalog of Components of Double and Multiple Stars|CCDM]]&nbsp;J20153+2536AB, [[Boss General catalogue|GC]]&nbsp;28140, [[Hipparcos catalogue|HIP]]&nbsp;99824, [[Harvard Revised catalogue|HR]]&nbsp;7739, [[Henry Draper Catalogue|HD]]&nbsp;192685, [[Smithsonian Astrophysical Observatory catalogue|SAO]]&nbsp;88410, [[Washington Double Star Catalog|WDS]]&nbsp;J20153+2536AB
}}
{{Starbox reference
⚫
| Simbad = HD+192685
}}
{{Starbox end}}

'''HD 192685''', also known as '''QR Vul''' or '''HR 7739''', is a star 1,199 [[Light year|ly]] away in the [[Vulpecula]] [[constellation]]. It is visible to the naked eye. It is a [[Be star]] and is slightly variable.<ref>K. Pavlovski et al. [http://aas.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aas/pdf/1997/13/ds1262.pdf UBV photometry of Be stars at Hvar: 1972-1990]</ref>
'''HD 192685''', also known as '''QR Vul''' or '''HR 7739''', is a star 1,199 [[Light year|ly]] away in the [[Vulpecula]] [[constellation]]. It is visible to the naked eye. It is a [[Be star]] and is slightly variable.<ref>K. Pavlovski et al. [http://aas.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aas/pdf/1997/13/ds1262.pdf UBV photometry of Be stars at Hvar: 1972-1990]</ref>
From October to December 1982 the Hydrogen alpha absorption line increased in emission strength by 30%.<ref name="Pavlovski">{{cite journal|last=Pavlovski|first=K.|author2=Bozic, H. |author3=Harmanec, P. |author4=Horn, J. |author5=Koubsky, P. |date=14 November 1983|title=Sudden Brightening of the Recently Discovered Be Star HR 7739|journal=Information Bulletin on Variable Stars|volume=2431|issue=1|issn=0374-0676|url=http://adsabs.harvard.edu/full/1983IBVS.2431....1P |bibcode=1983IBVS.2431....1P}}</ref> The line is partially filled by redshifted emission.<ref name="Green">{{cite web|url=http://www.cbat.eps.harvard.edu/iauc/03700/03710.html#Item2|title=2 Vul AND HR 7739|last=Green|first=Daniel W. E.|date=July 14, 1982|work=IAUC 3710|publisher=IAU Central Bureau for Astronomical Telegrams|accessdate=11 December 2012}}</ref>
From October to December 1982 the Hydrogen alpha absorption line increased in emission strength by 30%.<ref name="Pavlovski">{{cite journal|last=Pavlovski|first=K.|author2=Bozic, H. |author3=Harmanec, P. |author4=Horn, J. |author5=Koubsky, P. |date=14 November 1983|title=Sudden Brightening of the Recently Discovered Be Star HR 7739|journal=Information Bulletin on Variable Stars|volume=2431|issue=1|pages=1|issn=0374-0676|url=http://adsabs.harvard.edu/full/1983IBVS.2431....1P |bibcode=1983IBVS.2431....1P}}</ref> The line is partially filled by redshifted emission.<ref name="Green">{{cite web|url=http://www.cbat.eps.harvard.edu/iauc/03700/03710.html#Item2|title=2 Vul AND HR 7739|last=Green|first=Daniel W. E.|date=July 14, 1982|work=IAUC 3710|publisher=IAU Central Bureau for Astronomical Telegrams|accessdate=11 December 2012}}</ref>


HD 192685 has excess infrared emissions (12-100 μm) which are interpreted to be [[free-free radiation]] in the gas surrounding the star.<ref name="Cote">{{cite journal|last=Cote|first=J.|date=July 1987|title=B and A type stars with unexpectedly large colour excesses at IRAS wavelengths|journal=[[Astronomy and Astrophysics]]|volume=181|issue=1|page=83|issn=0004-6361|url=http://articles.adsabs.harvard.edu//full/1987A%26A...181...77C/0000083.000.html|bibcode=1987A&A...181...77C}}</ref>
HD 192685 has excess infrared emissions (12-100 μm) which are interpreted to be [[free-free radiation]] in the gas surrounding the star.<ref name="Cote">{{cite journal|last=Cote|first=J.|date=July 1987|title=B and A type stars with unexpectedly large colour excesses at IRAS wavelengths|journal=[[Astronomy and Astrophysics]]|volume=181|issue=1|page=83|issn=0004-6361|url=http://articles.adsabs.harvard.edu//full/1987A%26A...181...77C/0000083.000.html|bibcode=1987A&A...181...77C}}</ref>

It has at least one companion with separation 0.55" and magnitude 7.55,<ref name=Eggleton2008>{{cite journal | bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x | arxiv = 0806.2878 | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869 | year=2008 | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/MNRAS/389/869/table1&mHR=7739 Vizier catalog entry]</ref> and may also be a long-period spectroscopic binary.<ref name=WDS>{{cite journal | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466 | year=2001 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=B/wds/wds&WDS=20153%2B2536 Vizier catalog entry]</ref>


==References==
==References==
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[[Category:Objects named with variable star designations|Vulpeculae, QR]]
[[Category:Objects named with variable star designations|Vulpeculae, QR]]
[[Category:B-type main-sequence stars]]
[[Category:B-type main-sequence stars]]
[[Category:Hipparcos objects|099824]]
[[Category:HR objects|7739]]




{{main-star-stub}}
{{main-star-stub}}
{{multi-star-stub}}

Revision as of 09:22, 3 September 2016

HD 192685
Location of HD 192685 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Vulpecula
Right ascension 20h 15m 15.89542s[1]
Declination 25° 35′ 31.0549″[1]
Apparent magnitude (V) 4.79[2]
Characteristics
Spectral type B3V[3]
U−B color index -0.73[4]
B−V color index -0.18[4]
Astrometry
Radial velocity (Rv)-7.00[5] km/s
Proper motion (μ) RA: +6.93[1] mas/yr
Dec.: -3.89[1] mas/yr
Parallax (π)3.29 ± 0.51 mas[1]
Distanceapprox. 1,000 ly
(approx. 300 pc)
Absolute magnitude (MV)-2.56[2]
Details
Mass8.0[6] M☉
Luminosity3331[2] L☉
Surface gravity (log g)3.49[7] cgs
Temperature18,700[8] K
Metallicity [Fe/H]-0.10[7] dex
Rotational velocity (v sin i)160[9] km/s
Other designations
CCDM J20153+2536AB, GC 28140, HIP 99824, HR 7739, HD 192685, SAO 88410, WDS J20153+2536AB
Database references
SIMBADdata

HD 192685, also known as QR Vul or HR 7739, is a star 1,199 ly away in the Vulpecula constellation. It is visible to the naked eye. It is a Be star and is slightly variable.[10] 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.[12]

HD 192685 has excess infrared emissions (12-100 μm) which are interpreted to be free-free radiation in the gas surrounding the star.[13]

It has at least one companion with separation 0.55" and magnitude 7.55,[14] and may also be a long-period spectroscopic binary.[15]

References

  1. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c 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. Vizier catalog entry
  3. ^ Walker, G. A. H.,; Yang, S.; Witt, A. N.; Fahlman, G. G. (Aug–Sep 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.{{cite journal}}: CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link)
  4. ^ 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
  5. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  6. ^ Tetzlaff, N.; Neuhäuser, 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: 190. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. Vizier catalog entry
  7. ^ a b Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A...525A..71W. doi:10.1051/0004-6361/201015014.
  8. ^ Hohle, M.M.; Neuhäuser, 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. Vizier catalog entry
  9. ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573: 359. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
  10. ^ K. Pavlovski et al. UBV photometry of Be stars at Hvar: 1972-1990
  11. ^ 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 0374-0676.
  12. ^ Green, Daniel W. E. (July 14, 1982). "2 Vul AND HR 7739". IAUC 3710. IAU Central Bureau for Astronomical Telegrams. Retrieved 11 December 2012.
  13. ^ 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 0004-6361.
  14. ^ 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. Vizier catalog entry
  15. ^ 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 entry

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