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Contents

   



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1 Planetary system  




2 See also  




3 References  




4 External links  













HD 102272: Difference between revisions






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Coordinates: Sky map11h46m23.5351s, +14° 07′ 26.350″
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{{Short description|Star in the constellation Leo}}

{{Starbox begin

{{Starbox begin}}

| name = HD 102272

}}

{{Starbox observe

{{Starbox observe

| epoch = [[J2000.0]] ([[International Celestial Reference System|ICRS]])

| epoch = J2000.0 ([[International Celestial Reference System|ICRS]])

| constell = [[Leo (constellation)|Leo]]

| constell = [[Leo (constellation)|Leo]]

| ra = {{RA|11|46|23.5351}}<ref name=sb>{{SIMBAD link|HD+102272|HD 102272}}, entry, [[SIMBAD]]. Accessed on line [[June 18]], [[2008]].</ref>

| ra = {{RA|11|46|23.535}}<ref name=GaiaEDR3/>

| dec = {{DEC|+14|07|26.350}}<ref name=sb/>

| dec = {{DEC|+14|07|26.35}}<ref name=GaiaEDR3/>

| appmag_v = 8.71<ref name=sb/>

| appmag_v = 8.69<ref name=Deka-Szymankiewicz_et_al_2018/>

}}

}}

{{Starbox character

{{Starbox character

| type =

| class = K0<ref name=pp>[http://luth7.obspm.fr/~schneider/HD_102272a.pdf A Planetary System Around the K0 Giant HD 102272], A. Niedzielski et al., preprint. Submitted to ''Astrophysical Journal Letters''. Accessed on line [[June 18]], [[2008]].</ref>

| class = K0<ref name="Niedzielski2009"/> III<ref name=Deka-Szymankiewicz_et_al_2018/>

| b-v = 1.00<ref name=sb />

| u-b = 0.69<ref name=pp/>

| b-v = 1.02<ref name=Deka-Szymankiewicz_et_al_2018/>

| u-b = 0.69<ref name="Niedzielski2009"/>

| variable =

}}

}}

{{Starbox astrometry

{{Starbox astrometry

| prop_mo_ra = −7.88<ref name=sb/>

| radial_v = −11.99{{±|0.03}}<ref name=Deka-Szymankiewicz_et_al_2018/>

| prop_mo_dec = 7.41<ref name=sb/>

| prop_mo_ra = −7.371<ref name=GaiaEDR3/>

| prop_mo_dec = 7.639<ref name=GaiaEDR3/>

| parallax = 2.76

| p_error = 1.11

| parallax = 2.8571

| p_error = 0.1135

| parallax_footnote = <ref name=sb />

| parallax_footnote = <ref name=GaiaEDR3/>

| dist_ly = 1200±300

| absmag_v = 0.74<ref name=Deka-Szymankiewicz_et_al_2018/>

| dist_pc = 360±90<ref name="EPE">{{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= }}</ref>

| absmag_v = ~1<ref>From apparent magnitude and parallax.</ref>

}}

}}

{{Starbox detail

{{Starbox detail

| source = <!--[source url]-->

| source = <ref name=Deka-Szymankiewicz_et_al_2018/>

| mass = 1.9± 0.3<ref name=pp />

| mass = 1.01{{±|0.122}}

| radius = 10.1 ± 4.6<ref name=pp />

| radius = 8.02{{±|2.14}}

| gravity = 3.07 ± 0.12<ref name=pp />

| gravity = 2.57{{±|0.04}}

| luminosity = <!--Luminosity (in solar luminosities)-->

| luminosity = 25

| temperature = 4908 ± 35<ref name=pp />

| temperature = 4,750{{±|10}}

| metal = [[Metallicity|[Fe/H]]] = −0.26± 0.08<ref name=pp />

| metal_fe = −0.49{{±|0.06}}

| rotation = ~170 [[days]]<ref name=pp />

| rotation =

| rotational_velocity = 2.10{{±|0.90}}

| age = <!--Age (in years)-->

| age_gyr = 8.13

}}

}}

{{starbox catalog

{{starbox catalog

| names = {{odlist | HD=102272 | HIP=57428 | SAO=99784 | BD=+14 2434 }}<ref name=sb/>

| names = HIP 57428

}}

}}

{{Starbox reference

{{Starbox reference

| Simbad = HD+102272

| Simbad = HD+102272

| ARICNS = <!--Code-->

| ARICNS = <!--Code-->

}}

}}

{{Starbox end}}

{{Starbox end}}


'''HD 102272''' is a [[K-type star|K-type]] [[giant star|giant]] [[star]] approximately 1,200 [[light-year]]s away in the [[constellation]] of [[Leo (constellation)|Leo]]. {{As of|2008}}, two [[extrasolar planet]]s are known to orbit the star.<ref name=EPE />

'''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&nbsp;[[light year]]s based on [[stellar parallax|parallax]] measurements, but is drifting closer to the Sun with a [[radial velocity]] of −12&nbsp;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"/>

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&nbsp;km/s. It is radiating 25 times the luminosity of the Sun from its swollen [[photosphere]] at an [[effective temperature]] of 4,750&nbsp;K.<ref name=Deka-Szymankiewicz_et_al_2018/>


== Planetary system ==

== Planetary system ==


In June 2008, the discovery of two [[extrasolar planet]]s orbiting the star was announced.<ref name="EPE" /> The planets were discovered using the [[radial velocity]] method and 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=pp />

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/>


{{PlanetboxOrbit begin}}

{{OrbitboxPlanet begin

| table_ref = <ref name="Niedzielski2009"/>

{{PlanetboxOrbit

| exoplanet = [[HD 102272 b|b]]

| mass = >5.9 ± 0.2

| period = 127.58 ± 0.30

| semimajor = 0.614 ± 0.001

| eccentricity = 0.05 ± 0.04<ref name=pp />

}}

}}

{{OrbitboxPlanet

{{PlanetboxOrbit

| exoplanet = [[HD 102272 c|c]]

| exoplanet = [[HD 102272 b|b]]

| mass = >2.6 ± 0.4

| mass = >5.9 ± 0.2

| period = 520 ± 26

| period = 127.58 ± 0.30

| semimajor = 1.57 ± 0.05

| semimajor = 0.614 ± 0.001

| eccentricity = 0.68 ± 0.06<ref name=pp />

| eccentricity = 0.05 ± 0.04

}}

}}

{{OrbitboxPlanet

{{PlanetboxOrbit end}}

| exoplanet = [[HD 102272 c|c]]

| mass = >2.6 ± 0.4

| period = 520 ± 26

| semimajor = 1.57 ± 0.05

| eccentricity = 0.68 ± 0.06

}}

{{Orbitbox end}}

==See also==

* [[List of stars in Leo]]


== References ==

== References ==

{{Reflist|colwidth=30em|refs=


<ref name=sb>{{cite simbad

{{reflist}}

| title=HD 102272

| access-date=2022-01-17 }}</ref>

<ref name=GaiaEDR3>{{Cite Gaia EDR3|3923915248709126144}}</ref>

<ref name="EPE">{{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

}}</ref>

<ref name=Antoniadou_Voyatzis_2016>{{cite journal

| title=Orbital stability of coplanar two-planet exosystems with high eccentricities

| last1=Antoniadou | first1=Kyriaki I. | last2=Voyatzis | first2=George

| journal=Monthly Notices of the Royal Astronomical Society

| volume=461 | issue=4 | pages=3822–3834 | date=October 2016

| doi=10.1093/mnras/stw1553 | arxiv=1606.07743

| bibcode=2016MNRAS.461.3822A }}</ref>

<ref name=Deka-Szymankiewicz_et_al_2018>{{cite journal

| title=The Penn State - Toruń Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample

| last1=Deka-Szymankiewicz | first1=B. | last2=Niedzielski | first2=A.

| last3=Adamczyk | first3=M. | last4=Adamów | first4=M.

| last5=Nowak | first5=G. | last6=Wolszczan | first6=A.

| display-authors=1 | journal=Astronomy and Astrophysics

| volume=615 | pages=A31 | year=2018

| arxiv=1801.02899 | bibcode=2018A&A...615A..31D

| doi=10.1051/0004-6361/201731696 | s2cid=85526201 }}</ref>

<ref name="Niedzielski2009">{{cite journal

| title=A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272

| 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 | date=2009

| arxiv=0810.1710 | bibcode=2009ApJ...693..276N

| doi=10.1088/0004-637X/693/1/276 | s2cid=16074041 }}</ref>

}}


== External links ==

== External links ==

* {{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 }}

* {{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 }}


* {{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= }}

* {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+102272 | title=HD 102272 | work=Exoplanets |accessdate=2008-11-09 }}

{{-}}

{{Sky|11|46|23.5351|+|14|07|26.350|1200}}

{{Sky|11|46|23.5351|+|14|07|26.350|1200}}

{{Stars of Leo}}

[[Category:HD and HDE objects|102272]]

[[Category:HIP objects|057428]]

[[Category:Leo constellation]]

[[Category:K-type giants]]

[[Category:Planetary systems]]

{{Star-stub}}


[[es:HD 102272]]

{{DEFAULTSORT:HD 102272}}

[[pl:HD 102272]]

[[Category:K-type giants]]

[[Category:Planetary systems with two confirmed planets]]

[[Category:Leo (constellation)]]

[[Category:Durchmusterung objects|BD+14 2434]]

[[Category:Henry Draper Catalogue objects|102272]]

[[Category:Hipparcos objects|057428]]

Revision as of 03:07, 22 December 2023

HD 102272
Observation data
Epoch J2000.0 (ICRS)      Equinox J2000.0 (ICRS)
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]
Distance1,140 ± 50 ly
(350 ± 10 pc)
Absolute magnitude (MV)0.74[2]
Details[2]
Mass1.01±0.122 M☉
Radius8.02±2.14 R☉
Luminosity25 L☉
Surface gravity (log g)2.57±0.04 cgs
Temperature4,750±10 K
Metallicity [Fe/H]−0.49±0.06 dex
Rotational velocity (v sin i)2.10±0.90 km/s
Age8.13 Gyr
Other designations

BD+14 2434, HD 102272, HIP 57428, SAO 99784[4]

Database references
SIMBADdata

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, 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]

Planetary system

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]

The HD 102272 planetary system[3]
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 — —

See also

References

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this sourceatVizieR.
  • ^ a b c d e f g h i j Deka-Szymankiewicz, B.; et al. (2018). "The Penn State - Toruń Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample". Astronomy and Astrophysics. 615: A31. arXiv:1801.02899. Bibcode:2018A&A...615A..31D. doi:10.1051/0004-6361/201731696. S2CID 85526201.
  • ^ a b c d e Niedzielski, A.; et al. (2009). "A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272". The Astrophysical Journal. 693 (1): 276–280. arXiv:0810.1710. Bibcode:2009ApJ...693..276N. doi:10.1088/0004-637X/693/1/276. S2CID 16074041.
  • ^ "HD 102272". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-01-17.
  • ^ a b "Notes for star HD 102272". Extrasolar Planets Encyclopaedia. Archived from the original on July 25, 2008. Retrieved 2008-07-01.
  • ^ Antoniadou, Kyriaki I.; Voyatzis, George (October 2016). "Orbital stability of coplanar two-planet exosystems with high eccentricities". Monthly Notices of the Royal Astronomical Society. 461 (4): 3822–3834. arXiv:1606.07743. Bibcode:2016MNRAS.461.3822A. doi:10.1093/mnras/stw1553.

    • External links



    Retrieved from "https://en.wikipedia.org/w/index.php?title=HD_102272&oldid=1191198198"
    Categories: 
    ●K-type giants
     ●Planetary systems with two confirmed planets
     ●Leo (constellation)
     ●Durchmusterung objects
     ●Henry Draper Catalogue objects
     ●Hipparcos objects
     Hidden categories: 
    ●Articles citing publications with errata
     ●Articles with short description
     ●Short description matches Wikidata
     ●Articles containing potentially dated statements from 2008
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    ●This page was last edited on 22 December 2023, at 03:07 (UTC).
    ●This version of the page has been revised. Besides normal editing, the reason for revision may have been that this version contains factual inaccuracies, vandalism, or material not compatible with the Creative Commons Attribution-ShareAlike License.


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