HD 117618 b

{{Short description|Extrasolar planet in the constellation Centaurus}} {{Infobox planet | name = HD 117618 b / Noifasui | discoverer = [[C.G. Tinney]], [[R. Paul Butler|Butler]],<br>[[Geoffrey Marcy|Marcy]] ''et al.''<ref name="Tinney2005"/> | discovery_site = [[Anglo-Australian Observatory]] | discovered = 16 September 2004 | discovery_method = [[Doppler spectroscopy|Radial velocity]]  | apsis = astron | aphelion = {{convert|0.250|AU|km|abbr=on}} | perihelion = {{convert|0.102|AU|km|abbr=on}} | semimajor = {{convert|0.176|±|0.010|AU|km|abbr=on}} | eccentricity = 0.42 ± 0.17 | period = 25.827 ± 0.019 [[day|d]]<br>0.070709 [[year|y]] | avg_speed = 74.4 | time_periastron = 2,450,832.2 ± 1.8 | arg_peri = 254 ± 19 | semi-amplitude = 12.8 ± 2.2 | star = [[HD 117618]] | mass = >0.178 ± 0.021 {{Jupiter mass|link=y}}<br>(>56.5 {{Earth mass|sym=y|link=y}})  }} '''HD 117618 b''', named '''Noifasui''' by the [[IAU]],<ref name="IAU Approved"/> is an [[exoplanet]] discovered orbiting the [[star]] [[HD 117618]] in September 2004. The planet is a small [[gas giant]] with perhaps as little as a fifth the [[mass]] of [[Jupiter]]. It orbits close to its star in a very [[eccentricity (orbit)|eccentric]] orbit.<ref name="Tinney2005"/><ref name="Butler2006"/>

== Name == The planet was originally named "HD 117618 b", being the second object in the HD 117618 system. It was given the name "Noifasui" by the [[IAU]], chosen by Indonesian representatives for the [[NameExoWorlds]] campaign, meaning ''revolve around'' in Nias language (derived from the word ''ifasui'', meaning ''to revolve around'', and ''no'', indicating that the action occurred in the past and continued to the present time).<ref name="IAU Approved"/> Its parent star was simultaneously named "Dofida" in the contest.

==References== {{Reflist|refs=

<ref name="IAU Approved">{{cite web | url=http://www.nameexoworlds.iau.org/final-results | title=Approved names (§ Indonesia) | website=Name Exo Worlds | publisher=[[IAU]] | access-date=18 January 2020}}</ref>

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

<ref name="Tinney2005">{{cite journal | title=Three Low-Mass Planets from the Anglo-Australian Planet Search | last1=Tinney | first1=C. G. | last2=Butler | first2=R. Paul | last3=Marcy | first3=Geoffrey W. | last4=Jones | first4=Hugh R. A. | last5=Penny | first5=Alan J. | last6=McCarthy | first6=Chris | last7=Carter | first7=Brad D. | last8=Fischer | first8=Debra A. | display-authors=1 | journal=The Astrophysical Journal | volume=623 | issue=2 | date=2005 | pages=1171–1179 | bibcode=2005ApJ...623.1171T | doi=10.1086/428661 | citeseerx=10.1.1.491.2941 | s2cid=12515735 }}</ref>

}}

== External links == * {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+117618 | title=HD 117618 | work=Exoplanets | access-date=2008-10-31 | archive-url=https://web.archive.org/web/20120219234757/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+117618 | archive-date=2012-02-19 | url-status=dead }} * [http://exoplanets.org California & Carnegie Planet Search] [http://exoplanets.org/detail/HD_117618_b entry]

{{Centaurus}} {{DEFAULTSORT:Hd 117618 B}} [[Category:Exoplanets discovered in 2004]] [[Category:Giant planets]] [[Category:Centaurus]] [[Category:Exoplanets detected by radial velocity]] [[Category:Exoplanets with proper names]]