HD 125040

{{Short description|Visual binary star system in the constellation Boötes}} {{Starbox begin}} {{Starbox observe 2s | epoch = J2000 | constell = [[Boötes]]<ref name=xhip/> | component1 = A | ra1 = {{RA|14|16|32.84325}}<ref name=dr3a/> | dec1 = {{DEC|+20|07|18.6542}}<ref name=dr3a/> | appmag_v1 = 6.41<ref name=tycho2/> | component2 = B | ra2 = {{RA|14|16|32.97162}}<ref name=dr3b/> | dec2 = {{DEC|+20|07|14.6100}}<ref name=dr3b/> | appmag_v2 = 8.33<ref name=tdsc/> }} {{Starbox character | class = F8V<ref name="aj75_2_165"/> | r-i = | v-r = | b-v = +0.488<ref name="Häggkvist1969"/> | u-b = | variable = }} {{Starbox astrometry | absmag_v = 3.68<ref name=xhip/> }} {{Starbox astrometry|no_heading=y | component1 = A | radial_v = {{val|−6.90|0.47}}<ref name=dr2a/> | prop_mo_ra = −135.348<ref name=dr3a/> | prop_mo_dec = −95.322<ref name=dr3a/> | parallax = 30.2106 | p_error = 0.0226 | parallax_footnote = <ref name=dr3a/> | absmag_v = | component2 = B | radial_v2 = | prop_mo_ra2 = −125.557<ref name=dr3b/> | prop_mo_dec2 = −87.056<ref name=dr3b/> | parallax2 = 30.2246 | p_error2 = 0.0243 | parallax_footnote2 = <ref name=dr3b/> | absmag_v2 = }} {{Starbox orbit | reference = <ref name=Kiyaeva_et_al_2017/> | period = {{Val|956.6|299.4}} | axis = {{Val|3.75|0.75}} | axis_unitless = {{val|122.3|24.4|ul=AU}} | eccentricity = {{Val|0.53|0.08}} | inclination = {{Val|134.3|6.9}} | node = {{Val|14.1|10.4}} | periastron = {{Val|1683.9|14.2}} | periarg = {{Val|72.2|18.5}} }} {{Starbox detail | component1 = A | mass = 1.2<ref name=dr3a/> | luminosity = 2.4<ref name=dr3a/> | radius = 1.3<ref name=dr3a/> | temperature = 6,326<ref name=dr3a/> | gravity = 4.22<ref name=dr3a/> | metal_fe = −0.31<ref name=dr3a/> | rotation = | rotational_velocity = 35.9<ref name=valenti2005/> | age_gyr = 2.5<ref name=dr3a/> | component2 = B | mass2 = 0.86<ref name=dr3b/> | luminosity2 = 0.42<ref name=dr3b/> | radius2 = 0.81<ref name=dr3b/> | temperature2 = 5,260<ref name=dr3b/> | gravity2 = 4.53<ref name=dr3b/> | metal_fe2 = −0.17<ref name=dr3b/> | rotation2 = | rotational_velocity2 = | age_gyr2 = 5.2<ref name=dr3b/> }} {{Starbox catalog | names = {{odlist | BD=+20°2954 | HD=125040 | HIP=69751 | HR=5346 | SAO=83259 | WDS=J14165+2007AB }}<ref name="SIMBAD"/> }} {{Starbox reference | Simbad = HD+125040 | Simbad2 = HD+125040A |sn2=A | Simbad3 = HD+125040B |sn3=B }} {{Starbox end}}

'''HD 125040''' is a visual [[binary star]] system in the northern [[constellation]] of [[Boötes]]. It appears as a dim point of light near the lower limit of perception with the naked eye, having a combined [[apparent visual magnitude]] of 6.25.<ref name="Häggkvist1969"/> The system is located at a distance of approximately 106 [[light year]]s from the [[Sun]] based on [[stellar parallax|parallax]] measurements,<ref name="van Leeuwen2007"/> but is drifting closer with a [[radial velocity]] of −7 km/s.<ref name=apj159_1_141/> It has a high [[proper motion]], traversing the [[celestial sphere]] at an [[angular rate]] of {{val|0.164|u=arcseconds yr<sup>−1</sup>}}.<ref name=Lepine_Shara_2005/>

This was first reported to be a double by [[John Frederick William Herschel|J. F. W. Herschel]] in 1830. The stars orbit each other with a [[semi-major axis]] of {{val|122|ul=AU}}, a [[orbital period|period]] of roughly 956.6 years, and an [[orbital eccentricity|eccentricity]] of 0.53. They have a combined mass about double that of the Sun.<ref name=Kiyaeva_et_al_2017/> The combined spectral type is of an [[F-type main-sequence star]] with a [[stellar classification]] of F8V;<ref name="aj75_2_165"/> the brighter primary star has a spectral class of F6V.<ref name=abt1981/> The system is a source for [[X-ray astronomy|X-ray]] emission.<ref name=Schwope_et_al_2000/>

==References== <references> <ref name=SIMBAD>{{Cite simbad | title=HD 125040 | access-date=2014-10-02 }}</ref>

<ref name=xhip>{{citation |postscript=. |bibcode=2012AstL...38..331A |title=XHIP: An extended hipparcos compilation |last1=Anderson |first1=E. |last2=Francis |first2=Ch. |journal=Astronomy Letters |date=2012 |volume=38 |issue=5 |page=331 |doi=10.1134/S1063773712050015 |arxiv=1108.4971 }}</ref>

<ref name=abt1981>{{citation |postscript=. |bibcode=1981ApJS...45..437A |title=Visual multiples. VII. MK classifications |last1=Abt |first1=H. A. |journal=The Astrophysical Journal Supplement Series |date=1981 |volume=45 |page=437 |doi=10.1086/190719 }}</ref>

<ref name=valenti2005>{{citation |postscript=. |bibcode=2005ApJS..159..141V |title=Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs |last1=Valenti |first1=Jeff A. |last2=Fischer |first2=Debra A. |journal=The Astrophysical Journal Supplement Series |date=2005 |volume=159 |issue=1 |page=141 |doi=10.1086/430500 }}</ref>

<ref name=tycho2>{{citation |postscript=. |bibcode=2000A&A...355L..27H |title=The Tycho-2 catalogue of the 2.5 million brightest stars |last1=Høg |first1=E. |last2=Fabricius |first2=C. |last3=Makarov |first3=V. V. |last4=Urban |first4=S. |last5=Corbin |first5=T. |last6=Wycoff |first6=G. |last7=Bastian |first7=U. |last8=Schwekendiek |first8=P. |last9=Wicenec |first9=A. |journal=Astronomy and Astrophysics |date=2000 |volume=355 }}</ref>

<ref name=tdsc>{{citation |postscript=. |bibcode=2002A&A...384..180F |title=The Tycho double star catalogue |last1=Fabricius |first1=C. |last2=Høg |first2=E. |last3=Makarov |first3=V. V. |last4=Mason |first4=B. D. |last5=Wycoff |first5=G. L. |last6=Urban |first6=S. E. |journal=Astronomy and Astrophysics |date=2002 |volume=384 |page=180 |doi=10.1051/0004-6361:20011822 }}</ref>

<ref name=Kiyaeva_et_al_2017>{{citation | title=New orbits of wide visual double stars | display-authors=1 | last1=Kiyaeva | first1=O. V. | last2=Romanenko | first2=L. G. | last3=Zhuchkov | first3=R. Ya. | journal=Astronomy Letters | postscript=. | volume=43 | issue=5 | pages=316–331 | date=May 2017 | doi=10.1134/S1063773717040041 | bibcode=2017AstL...43..316K | s2cid=255196353 }}</ref>

<ref name="van Leeuwen2007">{{citation | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL | last=van Leeuwen | first=F. | postscript=. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |s2cid = 18759600 }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=69513 Vizier catalog entry ]</ref>

<ref name=apj159_1_141>{{citation | last1=Valenti | first1=Jeff A. | last2=Fischer | first2=Debra A. | title=Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs | journal=The Astrophysical Journal Supplement Series | volume=159 | issue=1 | pages=141–166 | date=July 2005 | doi=10.1086/430500 | doi-access=free | bibcode=2005ApJS..159..141V | postscript=. }}</ref>

<ref name="Häggkvist1969">{{citation | last1=Häggkvist | first1=L. | last2=Oja | first2=T. | title=Photoelectric BV photometry of 368 northern stars | journal=Arkiv för Astronomi | volume=5 | pages=125–135 | date=1969 | bibcode=1969ArA.....5..125H | postscript=. }}</ref>

<ref name="aj75_2_165">{{citation | last1=Harlan | first1=E. A. | last2=Taylor | first2=D. C. | title=MK classification for F- and G-type stars. II | journal=Astronomical Journal | postscript=. | volume=75 | issue=2 | pages=165–166 | date=March 1970 | bibcode=1970AJ.....75..165H | doi=10.1086/110956 | doi-access= }}</ref>

<ref name=Lepine_Shara_2005>{{citation | last1=Lépine | first1=Sébastien | last2=Shara | first2=Michael M. | title=A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) | journal=The Astronomical Journal | postscript=. | volume=129 | issue=3 | pages=1483–1522 | date=March 2005 | doi=10.1086/427854 | bibcode=2005AJ....129.1483L | arxiv=astro-ph/0412070 | s2cid=2603568 }}</ref>

<ref name=Schwope_et_al_2000>{{citation | title=The ROSAT Bright Survey: II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR > 0.2 s<sup>−1</sup> | last1=Schwope | first1=A. | last2=Hasinger | first2=G. | last3=Lehmann | first3=I. | last4=Schwarz | first4=R. | last5=Brunner | first5=H. | last6=Neizvestny | first6=S. | last7=Ugryumov | first7=A. | last8=Balega | first8=Yu. | last9=Trümper | first9=J. | last10=Voges | first10=W. | display-authors=1 | journal=Astronomische Nachrichten | postscript=. | volume=321 | issue=1 | pages=1–52 | year=2000 | doi=10.1002/(SICI)1521-3994(200003)321:1<1::AID-ASNA1>3.0.CO;2-C | bibcode=2000AN....321....1S | arxiv=astro-ph/0003039 }}</ref> </references>

==External links== * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205346 HR 5346], Bright Star Catalog entry at VizieR * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J14165%2b2007A CCDM J14165+2007], Catalog of Components of Double and Multiple Stars entry at VizieR * [http://aladin.u-strasbg.fr/AladinPreview?-c=14+16+32.8431%2B20+07+18.654&ident=HD+125040&submit=Aladin+previewer HD 125040] Aladin image

[[Category:F-type main-sequence stars]] [[Category:Binary stars]] [[Category:Boötes]] [[Category:Durchmusterung objects]] [[Category:Henry Draper Catalogue objects|125040]] [[Category:Hipparcos objects|069751]] [[Category:Bright Star Catalogue objects|5346]]