HD 156768: Difference between revisions

HD 156768
Observation data; Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17h 22m 55.22084s
Declination	−58° 00′ 37.1661″
Apparent magnitude (V)	5.86 (6.1 + 9.6)
Characteristics
Spectral type	G8Ib/II
U−B color index	+0.86
B−V color index	+1.07
Astrometry
Radial velocity (Rv)	−9.8±0.2 km/s
Proper motion (μ)	RA: −6.52 mas/yr ; Dec.: −14.35 mas/yr
Parallax (π)	2.98 ± 0.52 mas
Distance	approx. 1,100 ly ; (approx. 340 pc)
Details
HD 156768 A
Luminosity	616 L☉
Temperature	4,798 K
Rotational velocity (v sin i)	2.6±1.0 km/s
Other designations
	HD 156768, HIP 85049, HR 6438, SAO 244678.
Database references
SIMBAD	data

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HD 156768 is a double star in the southern constellation of Ara. The brighter component is a sixth magnitude bright giant or supergiant star with a stellar classification of G8Ib/II.^[4] The magnitude 9.6 companion lies at an angular separation of 1.81″ along a position angle of 184°.^[3]

References

^ ^a ^b ^c ^d ^e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
^ ^a ^b Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1134/S1063773706110065, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1134/S1063773706110065 instead.
^ ^a ^b Fabricius, C.; Makarov, V. V. (April 2000), "Two-colour photometry for 9473 components of close Hipparcos double and multiple stars", Astronomy and Astrophysics, 356: 141–145, Bibcode:2000A&A...356..141F.
^ ^a ^b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
^ ^a ^b Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N
^ ^a ^b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x
^ De Medeiros, J. R.; et al. (November 2002), "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars", Astronomy and Astrophysics, 395: 97–98, Bibcode:2002A&A...395...97D, doi:10.1051/0004-6361:20021214

External links

This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it.

[van_Leeuwen2007-1] van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.

[Gontcharov-2] Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1134/S1063773706110065, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1134/S1063773706110065 instead.

[aaa356_141-3] Fabricius, C.; Makarov, V. V. (April 2000), "Two-colour photometry for 9473 components of close Hipparcos double and multiple stars", Astronomy and Astrophysics, 356: 141–145, Bibcode:2000A&A...356..141F.

[houk1979-4] Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.

[aass34_1-5] Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N

[Mcdonald2012-6] McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x

[aaa395_97-7] De Medeiros, J. R.; et al. (November 2002), "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars", Astronomy and Astrophysics, 395: 97–98, Bibcode:2002A&A...395...97D, doi:10.1051/0004-6361:20021214

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@@ Line 1: / Line 1: @@
+{{Starbox begin
-{{No footnotes|date=October 2010}}
+ | name=HD 156768
+}}
-{{Starbox begin |
+{{Starbox observe
-   name=HD 156768 }}
+ | epoch=J2000
-{{Starbox observe |
+ | ra={{RA|17|22|55.22084}}<ref name="van Leeuwen2007"/>
-  epoch=J2000 |
+ | dec={{DEC|-58|00|37.1661}}<ref name="van Leeuwen2007"/>
-  ra=17<sup>h</sup> 22<sup>m</sup> 55.2219<sup>s</sup> |
+ | appmag_v=5.86<ref name="Gontcharov"/> {{nowrap|(6.1 + 9.6)}}<ref name=aaa356_141/>
-  dec= -58° 00&prime; 37.178&Prime; |
+ | constell=[[Ara (constellation)|Ara]]
-  appmag_v=5.87 |
+}}
-  constell=[[Ara (constellation)|Ara]] }}
-{{Starbox character |
+{{Starbox character
- class=G8Ib-II |
+ | class=G8Ib/II<ref name=houk1979/>
- r-i =  |
+ | r-i =
- v-r =  |
+ | v-r =
- b-v = 1.07 |
+ | b-v = +1.07<ref name=aass34_1/>
- u-b = 0.86 |
+ | u-b = +0.86<ref name=aass34_1/>
-  variable= }}
+ | variable=
+}}
-{{Starbox astrometry |
+{{Starbox astrometry
-  radial_v= |
+ | radial_v={{val|−9.8|0.2}}<ref name="Gontcharov"/>
-  prop_mo_ra=-5.59 |
+ | prop_mo_ra=−6.52<ref name="van Leeuwen2007"/>
-  prop_mo_dec=-15.56 |
+ | prop_mo_dec=−14.35<ref name="van Leeuwen2007"/>
-  parallax=4.15 |
+ | parallax=2.98
-  p_error=0.85 |
+ | p_error=0.52
+ | parallax_footnote=<ref name="van Leeuwen2007"/>
-  absmag_v=6.966 }}
+ | absmag_v=
-{{Starbox detail|
+}}
-  mass=1.1 |
+{{Starbox detail
-  radius=1.1 |
+ | component1 = HD 156768 A
-  luminosity=2.32 |
+ | mass=
-  temperature=5,000–6,000 |
+ | radius=
-  metal= |
+ | luminosity=616<ref name=Mcdonald2012/>
-  rotation= |
+ | temperature=4,798<ref name=Mcdonald2012/>
-  age= }}
+ | gravity=
-{{Starbox catalog |
+ | metal_fe=
-  names=[[Bright Star Catalogue|HR]] 6438, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 244678, [[Hipparcos Catalogue|HIP]] 85049, [[PPM Star Catalogue|PPM]] 345944. }}
+ | rotational_velocity={{val|2.6|1.0}}<ref name=aaa395_97/>
-{{Starbox reference |
+ | age_myr=
-  Simbad=HD+156768
+}}
-| ARICNS = }}
+{{Starbox catalog
-{{starbox sources|HIP|CCDM|HR}}
+ | names=[[Henry Draper Catalogue|HD]] 156768, [[Hipparcos Catalogue|HIP]] 85049, [[Bright Star Catalogue|HR]] 6438, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 244678. }}
+{{Starbox reference
+ | Simbad=HD+156768
+}}
 {{Starbox end}}
+'''HD 156768''' is a [[double star]] in the southern [[constellation]] of [[Ara (constellation)|Ara]]. The brighter component is a sixth magnitude [[bright giant]] or [[supergiant]] star with a [[stellar classification]] of G8Ib/II.<ref name=houk1979/> The magnitude 9.6 companion lies at an [[angular separation]] of 1.81[[arc second|″]] along a [[position angle]] of 184°.<ref name=aaa356_141/>
-'''HD 156768''' is a [[double star|double]] or multiple star.
 ==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
+ | postscript=.
+}}</ref>
+<ref name="Gontcharov">{{cite doi|10.1134/S1063773706110065}}</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
+ | year=1979 | volume=1
+ | bibcode=1978mcts.book.....H
+ | postscript=.
+}}</ref>
+<ref name=aass34_1>{{citation
+ | last1=Nicolet | first1=B.
+ | title=Photoelectric photometric Catalogue of homogeneous measurements in the UBV System
+ | journal=Astronomy and Astrophysics Supplement Series
+ | volume=34 | pages=1–49 | date=1978
+ | bibcode=1978A&AS...34....1N
+}}</ref>
+<ref name=Mcdonald2012>{{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
+}}</ref>
+<ref name=aaa395_97>{{citation
+ | display-authors=1
+ | last1=De Medeiros | first1=J. R.
+ | last2=Udry | first2=S.
+ | last3=Burki | first3=G.
+ | last4=Mayor | first4=M.
+ | title=A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars
+ | journal=Astronomy and Astrophysics
+ | volume=395 | pages=97–98 | date=November 2002
+ | doi=10.1051/0004-6361:20021214
+ | bibcode=2002A&A...395...97D
+}}</ref>
+<ref name=aaa356_141>{{citation
+ | last1=Fabricius | first1=C.
+ | last2=Makarov | first2=V. V.
+ | title=Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
+ | journal=Astronomy and Astrophysics | volume=356 | pages=141–145
+ |date=April 2000
+ | bibcode=2000A&A...356..141F
+ | postscript=.
+}}</ref>
+}}
+==External links==
 * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%206438 HR 6438]
 * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J17229-5801AB CCDM J17229-5801]

Observation data Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17^h 22^m 55.22084^s^[1]
Declination	−58° 00′ 37.1661″^[1]
Apparent magnitude (V)	5.86^[2] (6.1 + 9.6)^[3]
Characteristics
Spectral type	G8Ib/II^[4]
U−B color index	+0.86^[5]
B−V color index	+1.07^[5]
Astrometry

Radial velocity (R_v)	−9.8±0.2^[2] km/s
Proper motion (μ)	RA: −6.52^[1] mas/yr Dec.: −14.35^[1] mas/yr
Parallax (π)	2.98 ± 0.52 mas^[1]
Distance	approx. 1,100 ly (approx. 340 pc)

Details
HD 156768 A
Luminosity	616^[6] `L`_☉
Temperature	4,798^[6] K
Rotational velocity (v sin i)	2.6±1.0^[7] km/s

Other designations
HD 156768, HIP 85049, HR 6438, SAO 244678.
Database references
SIMBAD	data