HD 86226 b

{{Short description|Gas giant}} {{Infobox planet | name = [[Henry Draper Catalogue|HD]] 86226 b  | discoverer = Arriagada ''et al.'' | discovery_site = [[Las Campanas Observatory]] | discovered = January 26, 2010 | discovery_method = [[Doppler spectroscopy]]   | apsis = astron | semimajor = {{convert|2.73|±|0.06|AU|km|abbr=on}} | eccentricity = 0.059{{±|0.062|0.039}} | period = 1628{{±|22|21}} [[day|d]] | time_periastron = 2454821 ± 288 | star = [[HD 86226]]    }} [[File:HD_86226_G2V.jpeg | thumb | right]] '''HD 86226 b''' is a [[gas giant]] [[exoplanet]] discovered by the [[Magellan Planet Search Program]] in 2010.<ref name="MAGELLAN">{{cite journal | last1=Arriagada | first1=P. |display-authors=etal | date=2010 | title=Five Long-period Extrasolar Planets in Eccentric orbits from the Magellan Planet Search Program | journal=[[The Astrophysical Journal]] | volume=711 | issue=2 |page=1229 | arxiv=1001.4093 | bibcode=2010ApJ...711.1229A | doi=10.1088/0004-637X/711/2/1229 | s2cid=118682009 }}</ref> It was confirmed in data collected by the CORALIE [[spectrograph]] on the [[Swiss 1.2-metre Leonhard Euler Telescope]] in 2012.<ref name=coralie> {{cite journal |last1=Marmier |first1=M. |display-authors=etal |date=2013 |title=The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planets |journal=[[Astronomy & Astrophysics]] |volume=551 |pages=A90 |arxiv=1211.6444 |bibcode = 2013A&A...551A..90M |doi = 10.1051/0004-6361/201219639 |s2cid=59467665 }}</ref> It takes about 4.6 years to orbit its [[G-type main-sequence star|G-type star]] and was initially believed to have a minimal mass of 0.92 [[Jupiter|Jupiters]].<ref>{{Cite web|url=https://exoplanets.nasa.gov/exoplanet-catalog/6692/hd-86226-b/|title=Exoplanet-catalog|website=Exoplanet Exploration: Planets Beyond our Solar System|access-date=2020-01-10}}</ref> Discovery of the second planet in the system has led to the revised mass of HD 86226 b in 2020, now estimated to be 0.45{{±|0.04|0.05}}{{Jupiter mass}}.<ref name=Teske2020>{{citation|arxiv=2007.13927|title=TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet|year=2020|doi=10.3847/1538-3881/ab9f95 |last1=Teske |first1=Johanna |last2=Díaz |first2=Matías R. |last3=Luque |first3=Rafael |last4=Močnik |first4=Teo |last5=Seidel |first5=Julia V. |last6=Otegi |first6=Jon Fernández |last7=Feng |first7=Fabo |last8=Jenkins |first8=James S. |last9=Pallè |first9=Enric |last10=Ségransan |first10=Damien |last11=Udry |first11=Stèphane |last12=Collins |first12=Karen A. |last13=Eastman |first13=Jason D. |last14=Ricker |first14=George R. |last15=Vanderspek |first15=Roland |last16=Latham |first16=David W. |last17=Seager |first17=Sara |last18=Winn |first18=Joshua N. |last19=Jenkins |first19=Jon M. |last20=Anderson |first20=David. R. |last21=Barclay |first21=Thomas |last22=Bouchy |first22=François |last23=Burt |first23=Jennifer A. |last24=Butler |first24=R. Paul |last25=Caldwell |first25=Douglas A. |last26=Collins |first26=Kevin I. |last27=Crane |first27=Jeffrey D. |last28=Dorn |first28=Caroline |last29=Flowers |first29=Erin |last30=Haldemann |first30=Jonas |journal=The Astronomical Journal |volume=160 |issue=2 |page=96 |bibcode=2020AJ....160...96T |s2cid=220830943 |display-authors=1 |doi-access=free }}</ref>

== See also ==

* [[List of exoplanets discovered in 2010]]

== References == {{Reflist}}

[[Category:Exoplanets discovered in 2010]] [[Category:Exoplanets detected by radial velocity]] [[Category:Giant planets]] [[Category:Hydra (constellation)]]