HD 121504 b

{{Short description|Extrasolar planet in the constellation Centaurus}}  {{Infobox Planet | bgcolour = #A0B0FF | name = HD 121504 b | discovered = August 7, 2000 | discovery_method = [[Doppler spectroscopy|Radial velocity]] ([[CORALIE]]) | discovery_site = [[La Silla Observatory]] | discoverer = [[Michel Mayor|Mayor]] ''et al.'' | alt_names = HIP 68162 b | semimajor = {{convert|0.33|au|e6km|abbr=unit}} | apsis=astron | aphelion = {{convert|0.34|au|e6km|abbr=unit|link=on}} | perihelion= {{convert|0.32|au|e6km|abbr=unit}} | eccentricity = 0.03 ± 0.01 | period = 63.33 ± 0.03 [[day|d]] 0.1734 year | angular_dist = 7 [[milliarcsecond|mas]] | long_periastron = 265° ± 12° | time_periastron = 2,451,450 ± 2 [[Julian day|JD]] | semi-amplitude = 50.8 ± 0.9 [[meter per second|m/s]] | mass = >1.22 [[Jupiter mass|''M''J]] >388 [[Earth mass|''M''E]] |star=[[HD 121504]]}}

'''HD 121504 b''' is an [[exoplanet]] that is likely to be slightly less massive than [[Jupiter]]. Although the [[radial velocity]] method that was used to detect the planet can only measure the minimum mass of the planet, it is very unlikely that its [[true mass]] would be much higher.<ref name="Mayor2004"/>

HD 121504 b orbits the [[HD 121504|star]] at a distance of about one third of Earth's distance from the Sun, and has a slightly [[eccentricity (orbit)|eccentric]] orbit.

==References== {{Reflist|refs=

<ref name="Mayor2004">{{cite journal | title=The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE | url=http://www.aanda.org/articles/aa/full/2004/07/aa0250/aa0250.html | last1=Mayor | first1=M. | last2=Udry | first2=S. | last3=Naef | first3=D. | last4=Pepe | first4=F. | last5=Queloz | first5=D. | last6=Santos | first6=N. C. | last7=Burnet | first7=M. | display-authors=1 | journal=Astronomy and Astrophysics | volume=415 | issue=1 | pages=391–402 | year=2004 | arxiv=astro-ph/0310316 | bibcode=2004A&A...415..391M | doi=10.1051/0004-6361:20034250 | s2cid=5233877 }}</ref>

}}

==External links== * {{cite encyclopedia | url=https://exoplanet.eu/catalog/hd_121504_b--39/ | encyclopedia=[[Extrasolar Planets Encyclopaedia]] | title=HD 121504 b }} * {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+121504 | title=HD 121504 | work=Exoplanets | access-date=2008-11-04 | archive-url=https://web.archive.org/web/20160303203256/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+121504 | archive-date=2016-03-03 | url-status=dead }}

{{Sky|13|57|17.2375|-|56|02|24.153|144.6}}{{Centaurus}} {{DEFAULTSORT:HD 121504 b}} [[Category:Exoplanets discovered in 2000]] [[Category:Giant planets]] [[Category:Centaurus]] [[Category:Exoplanets detected by radial velocity]]