HD 18262

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{{Short description|Star in the constellation Cetus}}
{{Sky|02|56|13.8|+|08|22|53.6}}
{{Starbox begin}}
{{Starbox observe
|epoch=J2000
|equinox=J2000
|constell=[[Cetus]]{{Efn|Obtained with a right ascension of {{RA|02|56|13.767}} and a declination of {{DEC|+08|22|53.624}}<ref name=":2"/> on this [https://djm.cc/constellation.html website].|name=Constellation}}
|ra={{RA|02|56|13.767}}<ref name=":2"/>
|dec={{DEC|+08|22|53.624}}<ref name=":2"/>
|appmag_v=5.963<ref name=":2"/>
}}
{{Starbox character
|type=[[Subgiant]] to [[giant star]]
|class=F6III-IVs<ref name=":2" />
|appmag_1_passband=B
|appmag_1={{Val|6.431|0.015}}<ref name=":2"/>
|appmag_2_passband=G
|appmag_2={{Val|5.861|0.003}}<ref name=":2"/>
|appmag_3_passband=J
|appmag_3={{Val|5.134|0.037}}<ref name=":2"/>
|appmag_5_passband=K
|appmag_5={{Val|4.845|0.02}}<ref name=":2"/>
|appmag_4_passband=H
|appmag_4={{Val|4.934|0.098}}<ref name=":2"/>
|b-v=0.437<ref name=":8"/>
}}
{{Starbox astrometry
|radial_v={{Val|27.38|0.15}}<ref name=":10" />
|prop_mo_ra=111.39
|prop_mo_dec=-89.435
|pm_footnote=<ref name=":10" />
|parallax=23.1485
|p_error=0.0873
|parallax_footnote=<ref name=":10" />
|dist_ly=142.766
|dist_pc=43.7931
|dist_footnote=<ref name=":10" />
|absmag_v=2.79<ref name=":7"/>
}}
{{Starbox detail
|mass={{Val|1.54|0.03}}<ref name=":3"/>
|radius=1.996<ref name=":1"/>
|luminosity=6.017<ref name=":1"/>
|gravity=4.19<ref name=":9"/>
|temperature=6404<ref name=":1"/>
|metal_fe=0.358<ref name=":9"/>
|rotational_velocity=8.26<ref name=":9"/>
|age_gyr={{Val|1.64|0.29|0.22}}<ref name=":3"/>
}}
{{Starbox catalog
|names={{odlist|HD=18262|BD=+07 450|SAO=110851|TIC=387541497|TYC=641-763-1|WISE=J025613.80+082252.8|Gaia DR2=8810116091022208|Gaia DR3=8810116091022208|PPM=146068|2MASS=J02561376+0822534|IRAS=02535+0810|HR=870|HIP=13679|GSC=00641-00763}}
}}
{{Starbox reference
|Simbad=HD+18262}}
{{Starbox end}}

'''HD 18262''' (HR 870, HIP 13679) is a [[F-type star|F]]-type [[Giant star|giant]] or [[subgiant]] star located in the constellation [[Cetus]]. It has an apparent magnitude of 5.963, which makes it faintly visible to the naked eye. According to the [[Gaia (spacecraft)|Gaia spacecraft]], HD 18262 is located at a distance of {{Convert|43.79|pc|ly|lk=on|abbr=off}} and is moving away from Earth at a velocity of 27.4 km/s. Considering the apparent magnitude and the distance, its [[absolute magnitude]] is equivalent to 2.79. It belongs to the [[thin disk population]] of the Milky Way.

== Characteristics ==
It is an evolved [[F-type star]] that has left the [[main sequence]] and is now between a [[giant star]] and a [[subgiant]], based on its [[spectral type]] of F6III-IVs.<ref name=":2">{{Cite simbad|title=HD 18262|access-date=May 8, 2024}}</ref><ref name=":4">{{Cite web |title=The Classification of Stellar Spectra |url=http://www.star.ucl.ac.uk/~pac/spectral_classification.html |access-date=2024-05-08 |website=www.star.ucl.ac.uk}}</ref> The star is 1.54 times more massive than the Sun<ref name=":3">{{Cite journal |last=Aguilera-Gómez |first=Claudia |last2=Ramírez |first2=Iván |last3=Chanamé |first3=Julio |date=2018-06-01 |title=Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert |url=https://ui.adsabs.harvard.edu/abs/2018A&A...614A..55A |journal=Astronomy and Astrophysics |volume=614 |pages=A55 |doi=10.1051/0004-6361/201732209 |issn=0004-6361}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+A/614/A55&recno=297 here] at VizieR.</ref> and has expanded to 2 times its size.<ref name=":1">{{Cite journal |last=Schofield |first=Mathew |last2=Chaplin |first2=William J. |last3=Huber |first3=Daniel |last4=Campante |first4=Tiago L. |last5=Davies |first5=Guy R. |last6=Miglio |first6=Andrea |last7=Ball |first7=Warrick H. |last8=Appourchaux |first8=Thierry |last9=Basu |first9=Sarbani |last10=Bedding |first10=Timothy R. |last11=Christensen-Dalsgaard |first11=Jørgen |last12=Creevey |first12=Orlagh |last13=García |first13=Rafael A. |last14=Handberg |first14=Rasmus |last15=Kawaler |first15=Steven D. |date=2019-03-01 |title=The Asteroseismic Target List for Solar-like Oscillators Observed in 2 minute Cadence with the Transiting Exoplanet Survey Satellite |url=https://ui.adsabs.harvard.edu/abs/2019ApJS..241...12S |journal=The Astrophysical Journal Supplement Series |volume=241 |pages=12 |doi=10.3847/1538-4365/ab04f5 |issn=0067-0049}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJS/241/12&recno=1803 here] at VizieR.</ref> It is emitting six times the [[solar luminosity]] from its [[photosphere]] at an [[effective temperature]] of 6,400 [[Kelvin|K]],<ref name=":1" /> which is around 630 degrees hotter than the Sun. The age of HD 18262 is estimated at 1.64 billion years,<ref name=":3" /> equivalent to 36% of the [[Solar System]]'s age. The star is [[Metallicity|metal]]-enriched compared to the Sun, the abundance of iron &#91;[[Iron|Fe]]/[[Hydrogen|H]]&#93; on its surface is 2.3 higher than that of the Sun, while the oxygen abundance &#91;[[Oxygen|O]]/[[Hydrogen|H]]&#93; is 2.9 times higher.<ref name=":9">{{Cite journal |last=Rice |first=Malena |last2=Brewer |first2=John M. |date=2020-08-01 |title=Stellar Characterization of Keck HIRES Spectra with The Cannon |url=https://ui.adsabs.harvard.edu/abs/2020ApJ...898..119R |journal=The Astrophysical Journal |volume=898 |pages=119 |doi=10.3847/1538-4357/ab9f96 |issn=0004-637X}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/898/119&recno=321 here] at VizieR.</ref>{{Efn|from logarithms of 0.358 and 0.46 respectively.}} Its [[B-V color|B-V color index]] is 0.437,<ref name=":8">{{Cite journal |last=Isaacson |first=Howard |last2=Fischer |first2=Debra |date=2010-12-01 |title=Chromospheric Activity and Jitter Measurements for 2630 Stars on the California Planet Search |url=https://ui.adsabs.harvard.edu/abs/2010ApJ...725..875I |journal=The Astrophysical Journal |volume=725 |pages=875–885 |doi=10.1088/0004-637X/725/1/875 |issn=0004-637X}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/725/875&recno=434 here] at VizieR.</ref> giving it the yellowish-white color of a F-type star.

The distance to HD 18262, based on information from the [[Gaia (spacecraft)|Gaia spacecraft]], is of {{Convert|43.79|pc|ly|lk=on|abbr=off}}.<ref name=":10">{{Cite Gaia DR3|8810116091022208}}</ref> The [[apparent magnitude]] of the star is of 5.96<sup>[[Magnitude (astronomy)|m]]</sup>,<ref name=":2" /> which is bright enough to be seen to the naked eye under dark sites, far away from [[light pollution]].<ref>{{Cite web |title=Determining the Limiting Magnitude – Saguaro Astronomy Club |url=https://www.saguaroastro.org/determining-the-limiting-magnitude/ |access-date=2024-05-08 |website=www.saguaroastro.org}}</ref> The [[absolute magnitude]], i.e. its brightness if it was seen at a distance of {{Convert|10|pc|ly|lk=off|abbr=out|sigfig=3}}, is of 2.79.<ref name=":7">{{Cite web |last=Ford |first=Dominic |title=HIP-13679 (Star) |url=https://in-the-sky.org//data/object.php?id=TYC641-763-1 |access-date=2024-05-08 |website=In-The-Sky.org |language=en}}</ref> HD 18262 is moving away from Earth at a velocity of 27.38 km/s.<ref name=":2" /> It is part of the [[thin disk population]] of the Milky Way.<ref name=":0">{{Cite journal |last=Ramírez |first=I. |last2=Fish |first2=J. R. |last3=Lambert |first3=D. L. |last4=Allende Prieto |first4=C. |date=2012-09-01 |title=Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets |url=https://ui.adsabs.harvard.edu/abs/2012ApJ...756...46R |journal=The Astrophysical Journal |volume=756 |pages=46 |doi=10.1088/0004-637X/756/1/46 |issn=0004-637X}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/756/46&recno=185 here] at VizieR.</ref> Its orbit around the galaxy has a low [[Orbital eccentricity|eccentricity]] of 0.06 and its distance from the [[Galactic Center|galactic center]] varies from 7.14 to 8.11 [[kiloparsecs]] (23,280 to 26,440 light-years).<ref>{{Cite journal |last=Casagrande |first=L. |last2=Schönrich |first2=R. |last3=Asplund |first3=M. |last4=Cassisi |first4=S. |last5=Ramírez |first5=I. |last6=Meléndez |first6=J. |last7=Bensby |first7=T. |last8=Feltzing |first8=S. |date=2011-06-01 |title=New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey |url=https://ui.adsabs.harvard.edu/abs/2011A&A...530A.138C |journal=Astronomy and Astrophysics |volume=530 |pages=A138 |doi=10.1051/0004-6361/201016276 |issn=0004-6361}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+A/530/A138 here] at VizieR.</ref>

No [[Debris disk|debris disks]] have been detected around this star as of 2016<ref name=":6">{{Cite journal |last=Gáspár |first=András |last2=Rieke |first2=George H. |last3=Ballering |first3=Nicholas |date=2016-08-01 |title=The Correlation between Metallicity and Debris Disk Mass |url=https://ui.adsabs.harvard.edu/abs/2016ApJ...826..171G |journal=The Astrophysical Journal |volume=826 |pages=171 |doi=10.3847/0004-637X/826/2/171 |issn=0004-637X}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/826/171&recno=2071 here] at VizieR.</ref> and no [[Exoplanet|exoplanets]] have been detected around it as of 2012.<ref name=":0" /> A 2019 study analysed the possibility of HD 18262 hosting a [[giant planet]], in five ensembles, analysing five different compositions. The highest possibity was in the second ensemble, where the planet would be formed by [[Volatile (astrogeology)|volatiles]], [[Lithophile element|lithophiles]], and [[Siderophile element|sderophiles]]. In this case, the possibility is of 23%.<ref>{{Cite journal |last=Hinkel |first=Natalie R. |last2=Unterborn |first2=Cayman |last3=Kane |first3=Stephen R. |last4=Somers |first4=Garrett |last5=Galvez |first5=Richard |date=2019-07-01 |title=A Recommendation Algorithm to Predict Giant Exoplanet Host Stars Using Stellar Elemental Abundances |url=https://ui.adsabs.harvard.edu/abs/2019ApJ...880...49H |journal=The Astrophysical Journal |volume=880 |pages=49 |doi=10.3847/1538-4357/ab27c0 |issn=0004-637X}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/880/49&recno=2035 here] at VizieR.</ref> HD 18262's [[habitable zone]] is located at a mean distance of 2.44 astronomical units from it.<ref name=":5">{{Cite journal |last=Reiners |first=Ansgar |last2=Zechmeister |first2=Mathias |date=2020-03-01 |title=Radial Velocity Photon Limits for the Dwarf Stars of Spectral Classes F-M |url=https://ui.adsabs.harvard.edu/abs/2020ApJS..247...11R |journal=The Astrophysical Journal Supplement Series |volume=247 |pages=11 |doi=10.3847/1538-4365/ab609f |issn=0067-0049}} Data about this star is avaliable [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJS/247/11&recno=4743 here] at VizieR.</ref>

==Notes==
<references group="note"/>
{{Notelist|notes=
}}

==References==
<references />

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