removed Category:Planetary systems; added Category:Planetary systems with two confirmed planets using HotCat
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{{Short description|Star in the constellation Leo}} |
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{{Starbox begin |
{{Starbox begin}} |
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{{Starbox observe |
{{Starbox observe |
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| epoch = J2000.0 ([[International Celestial Reference System|ICRS]]) |
| epoch = J2000.0 ([[International Celestial Reference System|ICRS]]) |
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| constell = [[Leo (constellation)|Leo]] |
| constell = [[Leo (constellation)|Leo]] |
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| ra = {{RA|11|46|23. |
| ra = {{RA|11|46|23.535}}<ref name=GaiaEDR3/> |
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| dec = {{DEC|+14|07|26. |
| dec = {{DEC|+14|07|26.35}}<ref name=GaiaEDR3/> |
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| appmag_v = 8. |
| appmag_v = 8.69<ref name=Deka-Szymankiewicz_et_al_2018/> |
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}} |
}} |
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{{Starbox character |
{{Starbox character |
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| type = |
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| class = K0<ref name="Niedzielski2009"/> III<ref name=Deka-Szymankiewicz_et_al_2018/> |
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| b-v = 1.02<ref name=Deka-Szymankiewicz_et_al_2018/> |
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| variable = |
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}} |
}} |
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{{Starbox astrometry |
{{Starbox astrometry |
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| radial_v = −11.99{{±|0.03}}<ref name=Deka-Szymankiewicz_et_al_2018/> |
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| prop_mo_ra = −7.371<ref name=GaiaEDR3/> |
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| parallax = 4.10 |
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| parallax = 2.8571 |
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| p_error = 0.1135 |
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| parallax_footnote = <ref name= |
| parallax_footnote = <ref name=GaiaEDR3/> |
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| absmag_v = ~1<ref>From apparent magnitude and parallax.</ref> |
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| absmag_v = 0.74<ref name=Deka-Szymankiewicz_et_al_2018/> |
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}} |
}} |
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{{Starbox detail |
{{Starbox detail |
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| source = < |
| source = <ref name=Deka-Szymankiewicz_et_al_2018/> |
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| mass = 1. |
| mass = 1.01{{±|0.122}} |
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| radius |
| radius = 8.02{{±|2.14}} |
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| gravity = |
| gravity = 2.57{{±|0.04}} |
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| luminosity = |
| luminosity = 25 |
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| temperature = |
| temperature = 4,750{{±|10}} |
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| metal_fe = −0.49{{±|0.06}} |
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| metal = [[Metallicity|[Fe/H]]] = −0.26 ± 0.08 <ref name="Niedzielski2009"/> |
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| rotation |
| rotation = |
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| rotational_velocity = 2.10{{±|0.90}} |
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| age = <!--Age (in years)--> |
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| age_gyr = 8.13 |
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}} |
}} |
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{{starbox catalog |
{{starbox catalog |
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| names = {{odlist | HD=102272 | HIP=57428 | SAO=99784 | BD=+14 2434 }}<ref name=sb/> |
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| names = HIP 57428 |
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}} |
}} |
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{{Starbox reference |
{{Starbox reference |
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| Simbad = HD+102272 |
| Simbad = HD+102272 |
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| ARICNS = <!--Code--> |
| ARICNS = <!--Code--> |
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}} |
}} |
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{{Starbox end}} |
{{Starbox end}} |
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'''HD 102272''' is a [[ |
'''HD 102272''' is a [[star]] in the [[celestial equator|equatorial]] [[constellation]] of [[Leo (constellation)|Leo]]. With an [[apparent visual magnitude]] of 8.69,<ref name=Deka-Szymankiewicz_et_al_2018/> it is too faint to be visible to the naked eye. The syat is located at a distance of approximately 1,140 [[light year]]s based on [[stellar parallax|parallax]] measurements, but is drifting closer to the Sun with a [[radial velocity]] of −12 km/s.<ref name=Deka-Szymankiewicz_et_al_2018/> {{As of|2008}}, two [[extrasolar planet]]s are known to orbit the star.<ref name="EPE"/> |
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This is an [[stellar evolution|evolved]] [[giant star]]<ref name=Deka-Szymankiewicz_et_al_2018/> with a [[stellar classification]] of K0.<ref name="Niedzielski2009"/> It is an estimated eight billion years old and has expanded to eight times the Sun's radius. The star has about the same mass as the Sun and is spinning with a [[projected rotational velocity]] of 2 km/s. It is radiating 25 times the luminosity of the Sun from its swollen [[photosphere]] at an [[effective temperature]] of 4,750 K.<ref name=Deka-Szymankiewicz_et_al_2018/> |
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== Planetary system == |
== Planetary system == |
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In June 2008, the discovery of two [[extrasolar planet]]s orbiting the star was announced.<ref name="EPE" /> |
In June 2008, the discovery of two [[extrasolar planet]]s orbiting the star was announced.<ref name="EPE" /> The planets were detected using the [[radial velocity]] method with the [[Hobby-Eberly Telescope]]. The radial velocity data clearly shows the presence of the inner planet ([[HD 102272 b]]). Although there is evidence for another planet, there is insufficient data to unambiguously determine its orbit.<ref name="Niedzielski2009"/> The pair are close to a 4:1 [[orbital resonance]] with the outer planet in a high eccentricity orbit.<ref name=Antoniadou_Voyatzis_2016/> |
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{{OrbitboxPlanet begin |
{{OrbitboxPlanet begin |
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| table_ref = <ref name="Niedzielski2009"/> |
| table_ref = <ref name="Niedzielski2009"/> |
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}} |
}} |
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{{OrbitboxPlanet |
{{OrbitboxPlanet |
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| exoplanet = [[HD 102272 b|b]] |
| exoplanet = [[HD 102272 b|b]] |
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| mass = >5.9 ± 0.2 |
| mass = >5.9 ± 0.2 |
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| period = 127.58 ± 0.30 |
| period = 127.58 ± 0.30 |
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| semimajor = 0.614 ± 0.001 |
| semimajor = 0.614 ± 0.001 |
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| eccentricity = 0.05 ± 0.04 |
| eccentricity = 0.05 ± 0.04 |
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}} |
}} |
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{{OrbitboxPlanet |
{{OrbitboxPlanet |
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| exoplanet = [[HD 102272 c|c]] |
| exoplanet = [[HD 102272 c|c]] |
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| mass = >2.6 ± 0.4 |
| mass = >2.6 ± 0.4 |
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| period = 520 ± 26 |
| period = 520 ± 26 |
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| semimajor = 1.57 ± 0.05 |
| semimajor = 1.57 ± 0.05 |
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| eccentricity = 0.68 ± 0.06 |
| eccentricity = 0.68 ± 0.06 |
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}} |
}} |
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{{Orbitbox end}} |
{{Orbitbox end}} |
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==See also== |
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* [[List of stars in Leo]] |
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== References == |
== References == |
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{{Reflist|colwidth=30em|refs= |
{{Reflist|colwidth=30em|refs= |
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<ref name=sb>{{cite simbad |
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<ref name="Niedzielski2009">{{cite journal | title=A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272 | url=http://iopscience.iop.org/0004-637X/693/1/276/fulltext/ | last1=Niedzielski | first1=A. | last2=Goździewski | first2=K. | last3=Wolszczan | first3=A. | last4=Konacki | first4=M. | last5=Nowak | first5=G. | last6=Zieliński | first6=P. | display-authors=1 | journal=The Astrophysical Journal | volume=693 | issue=1 | pages=276–280 | year=2009 | arxiv=0810.1710 | bibcode=2009ApJ...693..276N | doi=10.1088/0004-637X/693/1/276 }}</ref> |
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| access-date=2022-01-17 }}</ref> |
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<ref name=GaiaEDR3>{{Cite Gaia EDR3|3923915248709126144}}</ref> |
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<ref name="van Leeuwen2007">{{cite journal | url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | 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 }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=57240 Vizier catalog entry ] </ref> |
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<ref name="EPE">{{cite encyclopedia |
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| url=http://exoplanet.eu/star.php?st=HD+102272 |
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| archive-url=https://web.archive.org/web/20080725115353/http://exoplanet.eu/star.php?st=HD+102272 |
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| url-status=dead |
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| archive-date=July 25, 2008 |
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| encyclopedia=[[Extrasolar Planets Encyclopaedia]] |
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| title=Notes for star HD 102272 |
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| access-date=2008-07-01 |
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}}</ref> |
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<ref name=Antoniadou_Voyatzis_2016>{{cite journal |
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| title=Orbital stability of coplanar two-planet exosystems with high eccentricities |
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| last1=Antoniadou | first1=Kyriaki I. | last2=Voyatzis | first2=George |
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| journal=Monthly Notices of the Royal Astronomical Society |
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| volume=461 | issue=4 | pages=3822–3834 | date=October 2016 |
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| doi=10.1093/mnras/stw1553 | arxiv=1606.07743 |
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| bibcode=2016MNRAS.461.3822A }}</ref> |
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<ref name=Deka-Szymankiewicz_et_al_2018>{{cite journal |
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| title=The Penn State - Toruń Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample |
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| last1=Deka-Szymankiewicz | first1=B. | last2=Niedzielski | first2=A. |
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| last3=Adamczyk | first3=M. | last4=Adamów | first4=M. |
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| last5=Nowak | first5=G. | last6=Wolszczan | first6=A. |
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| display-authors=1 | journal=Astronomy and Astrophysics |
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| volume=615 | pages=A31 | year=2018 |
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| arxiv=1801.02899 | bibcode=2018A&A...615A..31D |
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| doi=10.1051/0004-6361/201731696 | s2cid=85526201 }}</ref> |
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<ref name="Niedzielski2009">{{cite journal |
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| title=A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272 |
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| last1=Niedzielski | first1=A. | last2=Goździewski | first2=K. |
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| last3=Wolszczan | first3=A. | last4=Konacki | first4=M. |
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| last5=Nowak | first5=G. | last6=Zieliński | first6=P. |
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| display-authors=1 | journal=The Astrophysical Journal |
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| volume=693 | issue=1 | pages=276–280 | date=2009 |
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| arxiv=0810.1710 | bibcode=2009ApJ...693..276N |
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| doi=10.1088/0004-637X/693/1/276 | s2cid=16074041 }}</ref> |
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}} |
}} |
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== External links == |
== External links == |
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* {{cite encyclopedia |url=http://exoplanet.eu/star.php?st=HD+102272 |archive-url=https://web.archive.org/web/20080725115353/http://exoplanet.eu/star.php?st=HD+102272 |url-status=dead |archive-date=July 25, 2008 |encyclopedia=[[Extrasolar Planets Encyclopaedia]] |title=Notes for star HD 102272 |access-date=2008-07-01 }} |
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⚫ | * {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+102272 | title=HD 102272 | work=Exoplanets | accessdate=2008-11-09 | archive-url=https://web.archive.org/web/20091124161112/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+102272 | archive-date=2009-11-24 | url-status=dead }} |
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* {{cite web |url=http://exoplanet.eu/star.php?st=HD+102272 |title=Notes for star HD 102272 |accessdate=2008-07-01 |work=The Extrasolar Planets Encyclopaedia |publisher= |date= }} |
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⚫ | * {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+102272 | title=HD 102272 | work=Exoplanets |accessdate=2008-11-09 }} |
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{{-}} |
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{{Sky|11|46|23.5351|+|14|07|26.350|1200}} |
{{Sky|11|46|23.5351|+|14|07|26.350|1200}} |
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{{Stars of Leo}} |
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{{DEFAULTSORT:HD 102272}} |
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[[Category:K-type giants]] |
[[Category:K-type giants]] |
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[[Category:Planetary systems with two confirmed planets]] |
[[Category:Planetary systems with two confirmed planets]] |
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[[Category:Durchmusterung objects|BD+14 2434]] |
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{{Star-stub}} |
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[[es:HD 102272]] |
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[[fa:اچدی ۱۰۲۲۷۲]] |
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[[it:HD 102272]] |
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[[ja:HD 102272]] |
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[[pl:HD 102272]] |
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[[ru:HD 102272]] |
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[[zh:HD 102272]] |
Observation data Epoch J2000.0 (ICRS) Equinox J2000.0 (ICRS) | |
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Constellation | Leo |
Right ascension | 11h46m 23.535s[1] |
Declination | +14° 07′ 26.35″[1] |
Apparent magnitude (V) | 8.69[2] |
Characteristics | |
Spectral type | K0[3] III[2] |
U−B color index | 0.69[3] |
B−V color index | 1.02[2] |
Astrometry | |
Radial velocity (Rv) | −11.99±0.03[2] km/s |
Proper motion (μ) | RA: −7.371[1] mas/yr Dec.: 7.639[1] mas/yr |
Parallax (π) | 2.8571 ± 0.1135 mas[1] |
Distance | 1,140 ± 50 ly (350 ± 10 pc) |
Absolute magnitude (MV) | 0.74[2] |
Details[2] | |
Mass | 1.01±0.122 M☉ |
Radius | 8.02±2.14 R☉ |
Luminosity | 25 L☉ |
Surface gravity (log g) | 2.57±0.04 cgs |
Temperature | 4,750±10 K |
Metallicity [Fe/H] | −0.49±0.06 dex |
Rotational velocity (v sin i) | 2.10±0.90 km/s |
Age | 8.13 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 102272 is a star in the equatorial constellationofLeo. With an apparent visual magnitude of 8.69,[2] it is too faint to be visible to the naked eye. The syat is located at a distance of approximately 1,140 light years based on parallax measurements, but is drifting closer to the Sun with a radial velocity of −12 km/s.[2] As of 2008[update], two extrasolar planets are known to orbit the star.[5]
This is an evolved giant star[2] with a stellar classification of K0.[3] It is an estimated eight billion years old and has expanded to eight times the Sun's radius. The star has about the same mass as the Sun and is spinning with a projected rotational velocity of 2 km/s. It is radiating 25 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,750 K.[2]
In June 2008, the discovery of two extrasolar planets orbiting the star was announced.[5] The planets were detected using the radial velocity method with the Hobby-Eberly Telescope. The radial velocity data clearly shows the presence of the inner planet (HD 102272 b). Although there is evidence for another planet, there is insufficient data to unambiguously determine its orbit.[3] The pair are close to a 4:1 orbital resonance with the outer planet in a high eccentricity orbit.[6]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | >5.9 ± 0.2 MJ | 0.614 ± 0.001 | 127.58 ± 0.30 | 0.05 ± 0.04 | — | — |
c | >2.6 ± 0.4 MJ | 1.57 ± 0.05 | 520 ± 26 | 0.68 ± 0.06 | — | — |
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