{{Short description|Jovian planet orbiting HD 128311}} {{Infobox planet | name = HD 128311 b <!-- DISCOVERY --> | discoverer = [[R. Paul Butler|Butler]] ''et al.'' | discovery_site = {{flagicon|USA}} [[California]], United States | discovered = 2002 | discovery_method = [[Doppler Spectroscopy]] <!-- DESIGNATIONS --> <!-- ORBITAL --> | orbit_ref = <ref name="McArthur2014"/> | apsis = astron | aphelion = {{convert|1.412|AU|km|abbr=on}} | perihelion = {{convert|0.756|AU|km|abbr=on}} | semimajor = {{convert|1.084|±|0.006|AU|km|abbr=on}} | eccentricity = {{val|0.303|0.011}} | period = {{convert|453.019|±|0.404|d|yr|abbr=on}} | avg_speed = 26.2 | time_periastron = {{val|2450198.691|4.472}} | arg_peri = {{val|57.864|3.258}} | semi-amplitude = {{val|55.627|0.456}} | star = [[HD 128311]] | inclination = >30 <!-- PHYS CHARS --> | physical_ref = <ref name="McArthur2014"/> | mass = ≥{{val|1.769|0.023|ul=Jupiter mass}} <!-- ATMOSPHERE --> <!-- NOTES --> }} '''HD 128311 b''' is an [[exoplanet]]<ref name="Butler2003"/> located approximately 54 [[light-year]]s away in the [[constellation]] of [[Boötes (constellation)|Boötes]]. This planet orbits in an [[Eccentricity (orbit)|eccentric]] orbit about 1.084 [[astronomical unit|AU]] from its [[star]] ([[HD 128311]]). The planet has a [[minimum mass]] of 1.769 [[Jupiter mass]]es.<ref name="Vogt2005"/><ref name="McArthur2014"/>
==References== {{Reflist|colwidth=30em|refs=
<ref name="Butler2003">{{cite journal | title=Seven New Keck Planets Orbiting G and K Dwarfs | last1=Butler | first1=R. Paul | last2=Marcy | first2=Geoffrey W. | last3=Vogt | first3=Steven S. | last4=Fischer | first4=Debra A. | last5=Henry | first5=Gregory W. | last6=Laughlin | first6=Gregory | last7=Wright | first7=Jason T. | display-authors=1 | journal=The Astrophysical Journal | date=2003 | volume=582 | issue=1 | pages=455–466 | doi=10.1086/344570 | bibcode=2003ApJ...582..455B | citeseerx=10.1.1.7.6988 | s2cid=17608922 }}</ref>
<ref name="Vogt2005">{{cite journal | title=Five New Multicomponent Planetary Systems | last1=Vogt | first1=Steven S. | last2=Butler | first2=R. Paul | last3=Marcy | first3=Geoffrey W. | last4=Fischer | first4=Debra A. | last5=Henry | first5=Gregory W. | last6=Laughlin | first6=Greg | last7=Wright | first7=Jason T. | last8=Johnson | first8=John A. | display-authors=1 | journal=The Astrophysical Journal | date=2005 | volume=632 | issue=1 | pages=638–658 | doi=10.1086/432901 | bibcode=2005ApJ...632..638V| s2cid=16509245 | url=https://authors.library.caltech.edu/36250/1/0004-637X_632_1_638.pdf }}</ref>
<ref name="McArthur2014">{{cite journal | title=Astrometry, Radial Velocity, and Photometry: The HD 128311 System Remixed with Data from HST, HET, and APT | last1=McArthur | first1=Barbara E. | display-authors=etal | journal=[[The Astrophysical Journal]] | year=2014 | volume=795 | issue=1 | page=41 | doi=10.1088/0004-637X/795/1/41 | bibcode=2014ApJ...795...41M | s2cid=122980723 | doi-access=free | hdl=2152/35199 | hdl-access=free }}</ref>
}}
==External links== * {{cite encyclopedia| url=https://exoplanet.eu/catalog/hd_128311_b--109/ | encyclopedia=[[Extrasolar Planets Encyclopaedia]] | title=Notes for planet HD 128311 b | access-date=2008-08-18}} * {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+128311 | title=HD 128311 | work=Exoplanets | access-date=2008-08-18 | archive-url=https://web.archive.org/web/20080514224054/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+128311 | archive-date=2008-05-14 | url-status=dead }}
{{Sky|14|36|00.5607|+|09|44|47.466|54.14}}
{{HD 128311}} {{Boötes}}
[[Category:Boötes]] [[Category:Giant planets]] [[Category:Exoplanets discovered in 2002]] [[Category:Exoplanets detected by radial velocity]]
{{extrasolar-planet-stub}}