编辑“︁NGC 2423-3 b”︁

{{Planetbox begin
| name = NGC 2423-3 b
}}
{{Planetbox star
| star = [[NGC 2423-3]]
| constell = [[船尾座]]
| ra = {{RA|07|37|09}}
| dec = {{DEC|-13|54|24}}
| dist_ly = 2498
| dist_pc = 766
| class = K-M III
}}
{{Planetbox orbit
| semimajor = 2.1
| periastron = 1.66
| apastron = 2.54
| eccentricity = 0.21 ± 0.07
| period = 714.3 ± 5.3
| period_year = <!--orbital period in years (optional, can use period instead)-->
| inclination = <!--orbital inclination, in degrees-->
| ang_dist = 2.742
| arg_peri = 18 ± 10
| t_peri = 2,453,213 ± 21
| t_transit = <!--time of transit (Julian date, JD; can use t_transit_no_jd instead))-->
| t_approach = <!--time of closest approach (Julian date, JD)-->
| semi-amp = 71.5
}}
{{Planetbox character
| mass = &gt;10.6
| mass_earth = <!--mass in multiples of Earth's mass (optional)-->
| radius = <!--radius in multiples of Jupiter's radius (optional)-->
| radius_earth = <!--radius in multiples of Earth's radius (optional)-->
| radius_megameter = <!--radius in megameters (optional)-->
| density = <!--average density-->
| gravity = <!--surface gravity in m/s²-->
| gravity_earth = <!--surface gravity in multiples of Earth's surface gravity-->
| insolation = <!--insolation in W/m²-->
| insolation_earth = <!--insolation in multiples of Earth's insolation-->
| temperature = <!--temperature-->
}}
{{Planetbox discovery
| discovery_date = 2007年6月21日
| discoverers = [[米歇爾·麥耶]]等人
| discovery_method = [[都卜勒光譜學]]
| discovery_site = {{flag|France}}
| discovery_status = 已發表論文
}}
{{Planetbox end}}

'''NGC 2423-3b'''是一顆距離地球約2498光年的[[太陽系外行星]]，位於[[船尾座]]<ref>{{cite journal |url=http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/abs/2007/35/aa7375-07/aa7375-07.html |author=C. Lovis and M. Mayor |title=Two substellar companions in the open clusters NGC 2423 and NGC 4349 |journal=Astronomy & Astrophysics |year=2007 |volume=472 |pages=657–664 |bibcode=2007A&A...472..657L |doi=10.1051/0004-6361:20077375 |arxiv=0706.2174 |deadurl=yes |archiveurl=https://web.archive.org/web/20100408060446/http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=%2Farticles%2Faa%2Fabs%2F2007%2F35%2Faa7375-07%2Faa7375-07.html |archivedate=2010-04-08 |access-date=2017-09-05 }}</ref>。2007年發現該行星環繞[[疏散星團]][[NGC 2423]]的其中一顆成員星，[[紅巨星]][[NGC 2423-3]]。該行星的[[質量下限]]是10.6倍木星質量，但目前仍不知道它的軌道傾角，無法得知他的真實質量，因此它也可能是[[棕矮星]]。

該行星由[[克里斯多福·洛維斯]]和[[米歇爾·麥耶]]於2007年6月發現。洛維斯於2006年5月在另一顆船尾座的恆星[[HD 69830]]旁發現三顆質量相當於海王星的系外行星。

== 參見 ==
* [[NGC 4349-127 b]]
* [[PSR B1620-26 b]]

== 參考資料 ==
{{reflist}}
* SIMBAD [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%202423%203b NGC 2423 3 b]{{Wayback|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%202423%203b |date=20151106220233 }}

== 外部連結 ==
* {{cite web |url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=NGC+2423+3 |title=NGC 2423 3 |accessdate=2008-08-11 |work=Exoplanet |publisher= |date= |archive-url=https://web.archive.org/web/20091125005416/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=NGC+2423+3 |archive-date=2009-11-25 |dead-url=yes }}
* {{cite web |url=http://exoplanet.eu/planet.php?p1=NGC+2423+3&p2=b |title=Notes for planet NGC 2423 3 b |accessdate=2008-08-11 |work=The Extrasolar Planets Encyclopaedia |publisher= |date= |archive-date=2010-04-07 |archive-url=https://web.archive.org/web/20100407191555/http://exoplanet.eu/planet.php?p1=NGC+2423+3&p2=b |dead-url=no }}

{{Sky|07|37|09|-|13|54|24|2498}}

{{DEFAULTSORT:Ngc 2423-3 B}}
[[Category:船尾座]]
[[Category:類木行星]]
[[Category:2007年发现的系外行星]]
[[Category:徑向速度法發現的系外行星]]