- HD 102117
Starbox short
name= HD 102117
epoch=2000
constell=Centaurus
ra=11h 44m 50.46s
dec=-58° 42' 13.35"
spectral= G6V
appmag_v= 7.47
dist_ly= 136.9
dist_pc= 50.00
names= CD-58°4207, HIP 57291HD 102117 is a
yellow dwarf star (spectral type G6 V) about 130light year s fromEarth in theconstellation ofCentaurus . Although it is cooler than ourSun it is brighter and thus more evolved. In 2004, scientists discovered a planet orbiting the star.HD 102117 b
Infobox Planet
bgcolour = #A0B0FF
name = HD 102117 b
discovery = yes
discovered = 2004
discovery_method = Radial velocity
discovery_site = Australia
discoverer = Tinney et al.
semimajor = 0.1532 ± 0.0088 AU
eccentricity = 0.121 ± 0.082
period = 20.8133 ± 0.0064 d
angular_dist = 3.648 mas
long_periastron = 279°
time_periastron = 2,450,942.2 ± 2.6 JD
semi-amplitude = 11.8 ± 0.77 m/s
physical_characteristics = yes
mass = >0.172 ± 0.020 "M"JHD 102117 b is a planet discovered orbiting the star in 2004. 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 famous51 Pegasi b . It is one of the smallestextrasolar planet s discovered so far.References
*cite journal | url=http://www.journals.uchicago.edu/doi/full/10.1086/428661 | author=Tinney "et al." | title=Three Low-Mass Planets from the Anglo-Australian Planet Search | journal=The
Astrophysical Journal | volume=623 | issue=2 | year=2005 | pages=1171 – 1179 | doi=10.1086/428661
*cite journal | url=http://www.edpsciences.org/articles/aa/abs/2005/27/aa2864-05/aa2864-05.html | author=Lovis "et al." | title=The HARPS search for southern extra-solar planets III. Three Saturn-mass planets around HD 93083, HD 101930 and HD 102117 | journal =Astronomy and Astrophysics | volume=437 | year=2005 | pages=1121 – 1126 | doi=10.1051/0004-6361:20052864 | format=abstract
*cite journal | doi= 10.1086/504701 | author=Butler "et al." | title=Catalog of Nearby Exoplanets | journal=TheAstrophysical Journal | volume=646 | issue=1 | pages=505 – 522 | year=2006 ( [http://xxx.lanl.gov/abs/astro-ph/0607493 web Preprint] )External links
* [http://simbad.u-strasbg.fr/sim-fid.pl SIMBAD] [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=HD+102117 entry]
* [http://www.obspm.fr/encycl/encycl.html The Extrasolar Planets Encyclopaedia] [http://www.obspm.fr/encycl/HD102117.html entry]
* [http://www.extrasolar.net Extrasolar Visions] [http://www.extrasolar.net/startour.asp?StarCatId=&StarId=228 entry]
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