HD 114762 b

{{Sky|13|12|19.7427|+|17|31|01.643|132.3}}{{Short description|Star in the constellation Coma Berenices}} {{distinguish|text=HD 114762 b's stellar companion, [[HD 114762]]}} {{Starbox begin | name = HD 114762 b<ref name="Butler2006"/> }} {{Starbox observe | epoch = [[J2000]] | constell = [[Coma Berenices]] | ra = {{RA|13|12|19.7428}}<ref name="Gaia2016"/> | dec = {{DEC|+17|31|01.654}}<ref name="Gaia2016"/> }} {{Starbox astrometry | dist_ly = {{val|126|2}}<ref name="Gaia2016"/> | dist_pc = {{val|38.6|0.7}}<ref name="Gaia2016"/> }} {{Starbox orbit | primary = [[HD 114762]] | period_unitless = {{val|83.915|0.003}} [[day|d]]<ref name="Kiefer2019"/> | axis_unitless = {{val|0.375|0.006}} [[astronomical unit|AU]]<ref name="Kiefer2019"/> | eccentricity = {{val|0.566|0.012|0.011}}<ref name="Kiefer2019"/> | inclination = {{val|6.23|1.97|1.26}}<ref name="Kiefer2019"/> | periastron = {{val|2,449,889.106|0.186}}<ref name="Kane2011"/> | periarg = {{val|201.3|1.0}}<ref name="Kiefer2019"/> | k2 = {{val|612.48|3.52}}<ref name="Kane2011"/> }} {{Starbox detail | mass = {{val|0.293|0.103|0.056}}<ref name=":0" /> | radius_rj =  | luminosity_bolometric =  | luminosity_visual =  }} {{Starbox reference | Simbad = HD+114762+b }} {{Starbox end}}

'''HD 114762 b''' is a small [[red dwarf]] star<ref name="Kiefer2019"/> in the [[constellation]] of [[Coma Berenices]].<ref name="Butler2006" /><ref name="North2003" /> It is an optically undetected companion to the [[Late-type star|late]] [[F-type main-sequence star]] [[HD 114762]]. The system is located at a distance of approximately {{convert|38.6|pc|disp=flip|lk=on}} from the Sun.<ref name="simbad"/>

The companion was discovered in 1989 by Latham, ''et al''.,<ref name="Latham1989"/> and confirmed in an October 1991 paper by Cochran, ''et al''.<ref name="Cochran1991"/> Initially, it was thought to be the first discovered exoplanet (although its existence was confirmed after those around [[PSR B1257+12]]), and was believed to be a [[gas giant]].<ref name="North2003" /><ref name="Latham1989" />

The object orbits the primary star every 83.9 days at an approximate distance of 0.37 [[Astronomical unit|AU]],<ref name="Kiefer2019"/> with an [[orbital eccentricity]] of 0.57;<ref name="Kiefer2019"/> for comparison, this orbit is similar to that of [[Mercury (planet)|Mercury]] but with almost three times the eccentricity.<ref name="Kiefer2019"/> Based on the radial velocity measurements alone, it was estimated to have a minimum mass of {{Jupiter mass| {{val|11.069|0.063}} |link=y}} (at 90°)<ref name="wang"/> and a probable mass of approximately {{Jupiter mass|63.2|link=y}} (at 10°).<ref name="Kane2012"/> However, analysis of its astrometric perturbation of its host star in 2019 found it to have an extremely low inclination of only {{val|6.23|1.97|1.26}} degrees, giving it a true mass of {{Jupiter mass| {{val|107|20|27}}}} and putting it well outside of the range of planetary masses (less than {{Jupiter mass|13|link=y}}).<ref name="Kiefer2019"/> Further estimates have revised this up to 0.293 [[Solar mass|solar masses]].<ref name=":0">{{Cite journal |last=Winn |first=Joshua N. |date=2022-11-01 |title=Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data |journal=The Astronomical Journal |volume=164 |issue=5 |pages=196 |doi=10.3847/1538-3881/ac9126 |doi-access=free |arxiv=2209.05516 |bibcode=2022AJ....164..196W |issn=0004-6256}}</ref>

{{nowrap|HD 114762 b}} was thought for a time to be the first extrasolar planet ever detected, predating the discoveries of planets orbiting [[PSR B1257+12]] and [[main-sequence]] star [[51 Pegasi]], in 1992 and 1995, respectively.<ref name="Hale1995"/><ref name="Marcy1999"/> However, now that it has been found to not be a planet, the planets found orbiting PSR B1257+12 were indeed the first exoplanets ever found.<ref name="Kiefer2019"/>

At an event celebrating the career of discoverer David Latham and attended by his colleagues and collaborators, the object was informally dubbed "Latham's Planet".<ref name="Johnson2016"/> However, this name has no official standing with the [[International Astronomical Union]].

==See also== * [[51 Pegasi b]] * [[Gamma Cephei Ab]]

==References== {{Reflist|refs=

<ref name="Butler2006">{{cite journal |title=Catalog of Nearby Exoplanets |journal=The Astrophysical Journal |first1=R. P. |last1=Butler |first2=J. T. |last2=Wright |first3=G. W. |last3=Marcy |first4=D. A. |last4=Fischer |first5=S. S. |last5=Vogt |first6=C. G. |last6=Tinney |first7=H. R. A. |last7=Jones |first8=B. D. |last8=Carter |first9=J. A. |last9=Johnson |first10=C. |last10=McCarthy |first11=A. J. |last11=Penny |display-authors=1 |volume=646 |issue=1 |pages=505–522 |date=2006 |doi=10.1086/504701 |bibcode=2006ApJ...646..505B |arxiv=astro-ph/0607493|s2cid=119067572 }}</ref>

<ref name="Cochran1991">{{cite journal |title=Constraints on the Companion Object to HD 114762 |journal=[[The Astrophysical Journal]] |first1=William D. |last1=Cochran |first2=Artie P. |last2=Hatzes |first3=Terry J. |last3=Hancock |display-authors=1 |volume=380 |pages=L35–L38 |date=10 October 1991 |doi=10.1086/186167 |bibcode=1991ApJ...380L..35C|doi-access=free }}</ref>

<ref name="Gaia2016">{{cite journal |title=Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties |url=https://www.aanda.org/articles/aa/full_html/2016/11/aa29512-16/aa29512-16.html |last1=Brown |first1=A. G. A |last2=Vallenari |first2=A |last3=Prusti |first3=T |last4=De Bruijne |first4=J. H.J |last5=Mignard |first5=F |last6=Drimmel |first6=R |last7=Babusiaux |first7=C |last8=Bailer-Jones |first8=C. A.L |last9=Bastian |first9=U | last10=Biermann | first10=M |last11=Evans |first11=D. W |last12=Eyer |first12=L |last13=Jansen |first13=F |last14=Jordi |first14=C |last15=Katz |first15=D |last16=Klioner |first16=S. A |last17=Lammers |first17=U |last18=Lindegren |first18=L |last19=Luri |first19=X | last20=o'Mullane | first20=W |last21=Panem |first21=C |last22=Pourbaix |first22=D |last23=Randich |first23=S |last24=Sartoretti |first24=P |last25=Siddiqui |first25=H. I |last26=Soubiran |first26=C |last27=Valette |first27=V |last28=Van Leeuwen |first28=F |last29=Walton |first29=N. A | last30=Aerts | first30=C |display-authors=1 |journal=Astronomy and Astrophysics |volume=595 |at=A2 |year=2016 |arxiv=1609.04172 |bibcode=2016A&A...595A...2G |doi=10.1051/0004-6361/201629512|s2cid=1828208 }}[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/337/tgas&recno=1050120 Gaia Data Release 1 catalog entry]</ref>

<ref name="Hale1995">{{cite journal |title=On the Nature of the Companion to HD 114762 |journal=Publications of the Astronomical Society of the Pacific |publisher=[[The University of Chicago Press]] |first1=Alan |last1=Hale |author1-link=Alan Hale (astronomer) |volume=107 |issue=707 |pages=22–26 |date=1995 |bibcode=1995PASP..107...22H |jstor=40680489 |doi=10.1086/133511|doi-access=free }}</ref>

<ref name="Johnson2016">{{cite book |url=https://books.google.com/books?id=-DNJCgAAQBAJ&pg=PA137 |title=How do you find an Exoplanet? |publisher=[[Princeton University Press]] |location=New Jersey |first=John |last=Johnson |page=137 |date=2016 |isbn=978-0-691-15681-1}}</ref>

<ref name="Kane2011">{{cite journal |title=Revised Orbit and Transit Exclusion for HD 114762b |journal=The Astrophysical Journal Letters |last1=Kane |first1=Stephen R. |last2=Henry |first2=Gregory W. |last3=Dragomir |first3=Diana |last4=Fischer |first4=Debra A. |last5=Howard |first5=Andrew W. |last6=Wang |first6=Xuesong |last7=Wright |first7=Jason T. |display-authors=1 |volume=735 |issue=2 |at=L41 |year=2011 |arxiv=1106.1434 |bibcode=2011ApJ...735L..41K |doi=10.1088/2041-8205/735/2/L41|s2cid=118409104 }}</ref>

<ref name="Kane2012">{{cite journal |title=Distinguishing between stellar and planetary companions with phase monitoring |journal=Monthly Notices of the Royal Astronomical Society |first1=Stephen R. |last1=Kane |first2=Dawn M. |last2=Gelino |name-list-style=amp |volume=424 |issue=1 |pages=779–788 |year=2012 |arxiv=1205.5812 |bibcode=2012MNRAS.424..779K |doi=10.1111/j.1365-2966.2012.21265.x|doi-access=free |s2cid=15537565 }}</ref>

<ref name="Kiefer2019">{{cite journal |title=Determining the mass of the planetary candidate HD 114762 b using Gaia |arxiv=1910.07835 |last1=Kiefer |first1=Flavien |journal=Astronomy & Astrophysics |date=17 October 2019|volume=632 |pages=L9 |doi=10.1051/0004-6361/201936942 |bibcode=2019A&A...632L...9K |s2cid=204743831 }}</ref>

<ref name="Latham1989">{{cite journal |title=The unseen companion of HD114762: a probable brown dwarf |journal=[[Nature (journal)|Nature]] |first1=David W. |last1=Latham |first2=Tsevi |last2=Mazeh |first3=Robert P. |last3=Stefanik |first4=Michel |last4=Mayor |first5=Gilbert |last5=Burki |display-authors=1 |volume=339 |issue=6219 |pages=38–40 |date=4 May 1989 |doi=10.1038/339038a0 |bibcode=1989Natur.339...38L|s2cid=4324036 }}</ref>

<ref name="Marcy1999">{{cite journal |title=Two New Candidate Planets in Eccentric Orbits |journal=The Astrophysical Journal |first1=Geoffrey W. |last1=Marcy |author1-link=Geoffrey Marcy |first2=R. Paul |last2=Butler |first3=Steven S. |last3=Vogt |first4=Debra |last4=Fischer |first5=Michael C. |last5=Liu |display-authors=1 |volume=520 |issue=1 |pages=239–247 |date=1999 |doi=10.1086/307451 |bibcode=1999ApJ...520..239M |arxiv=astro-ph/9904275|s2cid=16827678 }}</ref>

<ref name="North2003">{{cite book |url=https://books.google.com/books?id=D3RRG9W8nSYC&pg=PA185 |title=Astronomy in Depth |publisher=Springer |location=New York |first=Gerald |last=North |page=185 |date=2003 |isbn=9781852335809}}</ref>

<ref name="simbad">{{cite simbad |title=HD 114762b |access-date=31 August 2014}}</ref>

<ref name="wang">{{cite journal |title=The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b |journal=The Astrophysical Journal |first1=Sharon Xuesong |last1=Wang |first2=Jason T. |last2=Wright |first3=William |last3=Cochran |first4=Stephen R. |last4=Kane |first5=Gregory W. |last5=Henry |first6=Matthew J. |last6=Payne |first7=Michael |last7=Endl |first8=Phillip J. |last8=MacQueen |first9=Jeff A. |last9=Valenti |first10=Victoria |last10=Antoci |first11=Diana |last11=Dragomir |first12=Jaymie M. |last12=Matthews |first13=Andrew W. |last13=Howard |first14=Geoffrey W. |last14=Marcy |first15=Howard |last15=Isaacson |first16=Eric B. |last16=Ford |first17=Suvrath |last17=Mahadevan |first18=Kaspar |last18=von Braun |display-authors=1 |volume=761 |issue=1 |pages=46–59 |date=2012 |doi=10.1088/0004-637X/761/1/46 |bibcode=2012ApJ...761...46W |arxiv=1210.6985|s2cid=118679173 }}</ref>

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{{Coma Berenices}} {{DEFAULTSORT:Hd 114762 B}} [[Category:Coma Berenices]] [[Category:Astronomical objects discovered in 1989]] [[Category:Red dwarfs]] [[Category:Disproven exoplanets]]