{{Short description|Extrasolar planet}} {{Infobox planet | name = HD 102117 b / Leklsullun <!-- DISCOVERY -->| discoverer = Tinney ''et al.''<ref name="Tinney2005"/> | discovery_site = [[Anglo-Australian Observatory]], [[Australia]] | discovered = September 16, 2004 | discovery_method = [[Radial velocity method|Radial Velocity]] <!-- DESIGNATIONS --> <!-- ORBITAL -->| apsis = astron | aphelion = {{convert|0.1717|AU|km|abbr=on}} | perihelion = {{convert|0.1347|AU|km|abbr=on}} | semimajor = {{convert|0.1532|±|0.0088|AU|km|abbr=on}} | eccentricity = 0.106 ± 0.07 | period = 20.8133 ± 0.0064 [[day|d]] | avg_speed = 80.35 | time_periastron = 10942.9 ± 3 2.400.000 | arg_peri = 283 ± 3 | semi-amplitude = 11.8 ± 0.77 | star = [[HD 102117]] <!-- PHYS CHARS -->| mass = >0.172 ± 0.018 {{Jupiter mass|link=y}}<br>(>54.7 {{Earth mass|sym=y|link=y}}) <!-- ATMOSPHERE --> <!-- NOTES -->}} '''HD 102117 b''', formally named '''Leklsullun''',<ref>{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=Approved names|website=[[NameExoWorlds]]|language=en|access-date=2020-01-02}}</ref> is a planet that orbits the [[star]] [[HD 102117]]. The planet is a small [[gas giant]] a fifth the size of [[Jupiter]]. It orbits very close to its star, but not in a "torch orbit" like the famous [[51 Pegasi b]]. It was one of the smallest [[extrasolar planet]]s discovered as of 2006.<ref name="Butler2006"/>
In 2004, the [[Anglo-Australian Planet Search]] announced a planet orbiting the [[star]] [[HD 102117]].<ref name="Tinney2005"/> A short time later the [[HARPS]] team also announced the presence of a planet around this same [[star]] [[HD 102117]]. Both groups detected this planet using the [[radial velocity method]].<ref name="Lovis2005"/>
==References== <references> <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="Lovis2005">{{cite journal | title=The HARPS search for southern extra-solar planets III. Three Saturn-mass planets around HD 93083, HD 101930 and HD 102117 | last1=Lovis | first1=C. | last2=Mayor | first2=M. | last3=Bouchy | first3=F. | last4=Pepe | first4=F. | last5=Queloz | first5=D. | last6=Santos | first6=N. C. | last7=Udry | first7=S. | last8=Benz | first8=W. | last9=Bertaux | first9=J.-L. | last10=Mordasini | first10=C. | last11=Sivan | first11=J.-P. | display-authors=1 | journal=Astronomy and Astrophysics | volume=437 | issue=3 | pages=1121–1126 | date=2005 | arxiv=astro-ph/0503660 | bibcode=2005A&A...437.1121L | doi=10.1051/0004-6361:20052864 }}</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> </references>
== External links == * {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+102117 | title=HD 102117 | work=Exoplanets | access-date=2008-11-04 | archive-url=https://web.archive.org/web/20120304130302/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+102117 | archive-date=2012-03-04 | url-status=dead }}
{{Sky|11|44|50.4616|-|58|42|13.354|136.9}}{{Centaurus}}
{{DEFAULTSORT:Hd 102117 B}} [[Category:Exoplanets discovered in 2005]] [[Category:Giant planets]] [[Category:Centaurus]] [[Category:Exoplanets detected by radial velocity]] [[Category:Exoplanets with proper names]]
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