View source for HD 156091

{{Short description|Double star in the constellation Ara}}
{{Starbox begin
| name=HD 156091
}}
{{Starbox observe
| epoch=J2000
| ra={{RA|17|19|12.50730}}<ref name="van Leeuwen2007"/>
| dec={{DEC|−59|41|40.5989}}<ref name="van Leeuwen2007"/>
| appmag_v=5.91<ref name=mnrassa27_11/> {{nowrap|(5.91 + 13.00)}}<ref name=WDSC2014/>
| constell=[[Ara (constellation)|Ara]]
}}
{{Starbox character
| class={{nowrap|K2 IIICNIB/II}}<ref name=houk1979/>
| r-i =
| v-r =
| b-v = 1.37<ref name=mnrassa27_11/>
| u-b =
| variable=
}}
{{Starbox astrometry
| radial_v={{val|-5.0|0.4}}<ref name="Gontcharov"/>
| prop_mo_ra=−3.15<ref name="van Leeuwen2007"/>
| prop_mo_dec=−8.05<ref name="van Leeuwen2007"/>
| parallax=1.31
| p_error=0.36
| parallax_footnote=<ref name="van Leeuwen2007"/>
| absmag_v=
}}
{{Starbox detail
| mass={{val|8.4|1.0}}<ref name=mnras410_1_190/>
| radius=
| luminosity=4,266<ref name=Mcdonald_et_al_2012/>
| temperature=4,306<ref name=Mcdonald_et_al_2012/>
| metal_fe=
| rotational_velocity=
| age_myr={{val|33.7|8.6}}<ref name=mnras410_1_190/>
}}
{{Starbox catalog
| names=[[Durchmusterung|CD]]-59° 6506, [[Henry Draper Catalogue|HD]] 156091, [[Hipparcos Catalogue|HIP]] 84731, [[Bright Star Catalogue|HR]] 6408, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 244613.
}}
{{Starbox reference
| Simbad=HD+156091
}}
{{Starbox end}}
'''HD 156091''' is a [[double star]] in the southern [[constellation]] of [[Ara (constellation)|Ara]]. The primary is a sixth magnitude [[giant star]] with stronger than normal [[absorption line|lines]] of carbon, nitrogen, and barium in its spectrum.<ref name=pasp99_629/> The companion is a 13th magnitude star at an [[angular separation]] of 27.4[[arc second|″]] along a [[position angle]] of 275°, as of 2000.<ref name=WDSC2014/>
==References==
{{reflist|refs=
<ref name="van Leeuwen2007">{{citation
| last1=van Leeuwen | first1=F.
| title=Validation of the new Hipparcos reduction
| journal=Astronomy and Astrophysics
| volume=474 | issue=2 | pages=653–664 | year=2007
| arxiv=0708.1752
| bibcode=2007A&A...474..653V
| doi=10.1051/0004-6361:20078357
| s2cid=18759600
| postscript=.
}}</ref>
<ref name="Gontcharov">{{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 = 759–771| date = November 2006| last1 = Gontcharov | first1 = G. A.|arxiv = 1606.08053 | s2cid=119231169}}</ref>
<ref name=mnrassa27_11>{{citation
| last1=Corben | first1=P. M.
| last2=Stoy | first2=R. H.
| title=Photoelectric Magnitudes and Colours for Bright Southern Stars
| journal=Monthly Notes of the Astronomical Society of Southern Africa
| volume=27 | page=11 | year=1968
| bibcode=1968MNSSA..27...11C
| postscript=.
}}</ref>
<ref name=houk1979>{{citation
| last1=Houk | first1=Nancy
| last2=Cowley | first2=A. P.
| title=Michigan catalogue of two-dimensional spectral types for the HD stars
| publication-place=Ann Arbor, Michigan
| publisher=Dept. of Astronomy, University of Michigan
| volume=1 | year=1979
| bibcode=1978mcts.book.....H
| postscript=.
}}</ref>
<ref name=Mcdonald_et_al_2012>{{citation
| display-authors=1
| last1=McDonald | first1=I.
| last2=Zijlstra | first2=A. A.
| last3=Boyer | first3=M. L.
| title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars
| journal=Monthly Notices of the Royal Astronomical Society
| volume=427 | issue=1 | pages=343–57 | date=2012
| bibcode=2012MNRAS.427..343M | arxiv=1208.2037
| doi=10.1111/j.1365-2966.2012.21873.x
| doi-access=free | s2cid=118665352 | postscript=.
}}</ref>
<ref name=mnras410_1_190>{{citation
| display-authors=1
| last1=Tetzlaff | first1=N.
| last2=Neuhäuser | first2=R.
| last3=Hohle | first3=M. M.
| title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun
| journal=Monthly Notices of the Royal Astronomical Society
| volume=410 | issue=1 | pages=190–200 | date=January 2011
| doi=10.1111/j.1365-2966.2010.17434.x
| doi-access=free | bibcode=2011MNRAS.410..190T
| arxiv=1007.4883
| s2cid=118629873 | postscript=.
}}</ref>
<ref name=pasp99_629>{{citation
| last1=Keenan | first1=Philip C.
| last2=Yorka | first2=Sandra B.
| last3=Wilson | first3=Olin C.
| title=Recognition and classification of strong-CN giants
| journal=Publications of the Astronomical Society of the Pacific
| volume=99 | pages=629–636 |date=July 1987
| doi=10.1086/132025
| bibcode=1987PASP...99..629K
| postscript=.
| doi-access=free
}}</ref>
<ref name=WDSC2014>{{citation
| display-authors=1
| last1=Mason | first1=B. D.
| last2=Wycoff | first2=G. L.
| last3=Hartkopf | first3=W. I.
| last4=Douglass | first4=G. G.
| last5=Worley | first5=C. E.
| title=The Washington Visual Double Star Catalog
| journal=The Astronomical Journal | year=2014 | volume=122 | issue=6 | page=3466 | bibcode=2001AJ....122.3466M
| url=http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds
| access-date=2015-07-22
|doi = 10.1086/323920 | doi-access=free
}}</ref>
}}
==External links==
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%206408 HR 6408]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=HD+156091&ident=HD+156091&submit=Aladin+previewer Image HD 156091]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J17192-5942A CCDM 17192-5942]
{{Stars of Ara}}
{{DEFAULTSORT:HD 156091}}
[[Category:Ara (constellation)]]
[[Category:Henry Draper Catalogue objects|156091]]
[[Category:Double stars]]
[[Category:K-type giants]]
[[Category:Bright Star Catalogue objects|6408]]
[[Category:Durchmusterung objects]]
[[Category:Hipparcos objects|084731]]
{{Multi-star-stub}}