编辑“︁HD 29587”︁

{{Starbox begin 
 | name = HD 29587
}}
{{Starbox image
 | image = [[Image:Brown Dwarf HD 29587 B.png|250px|center]]
 | caption = 艺术家绘制的HD 29587星系中[[褐矮星]]HD 29587b假想图
}}
{{Starbox observe
 | epoch = J2000 
 | constell = [[英仙座]]
 | ra = {{RA|04|41|36.31645}}<ref name=GaiaDR2/>
 | dec = {{DEC|+42|07|06.4209}}<ref name=GaiaDR2/>
 | appmag_v = 7.29<ref name=Anderson2012/>
}}
{{Starbox character
 | class = G2&nbsp;V<ref name=DaSilva2015/>
 | b-v = 0.633<ref name=DaSilva2015/>
}}
{{Starbox astrometry
 | radial_v = {{Val|+112.67|0.20}}<ref name=GaiaDR2/>
 | prop_mo_ra = +534.004<ref name=GaiaDR2/>
 | prop_mo_dec = −414.768<ref name=GaiaDR2/>
 | parallax = 36.3130
 | p_error = 0.0697
 | parallax_footnote = <ref name=GaiaDR2/>
 | absmag_v = 5.08<ref name=DaSilva2015/>
}}
{{Starbox orbit
 | reference = <ref name=Halbwachs2000/>
 | period_unitless = {{Val|1474.9|10.2|u=days|fmt=commas}}
 | eccentricity = {{Val|0.356|0.095}}
 | periastron = 儒略日{{Val|2447763.5|45.8|fmt=commas}}
 | periarg = {{Val|80.2|13.3}}
 | k1 = {{Val|1.02|0.16}}
}}
{{Starbox detail
 | source = <ref name=DaSilva2015/>
 | mass = {{Val|0.78|0.03}}
 | radius = 
 | luminosity = {{Val|0.798|0.040|-0.038}}
 | gravity = {{Val|4.54|0.22}}
 | temperature = {{Val|5709|35|fmt=commas}}
 | metal_fe = {{Val|−0.51|0.05}}
 | rotational_velocity = 
 | age_gyr = {{Val|14.7|3.8|-2.7}}
}}
{{Starbox catalog
 | names={{odlist | BD=+41° 931 | FK5=4419 | HD=29587 | HIP=21832 | HR= | SAO=39690 | 2MASS=J04413631+4207065 | TYC=2901-00064-1 }}<ref name=SIMBAD/>
}}
{{Starbox reference
 | Simbad = HD+29587
 | EPE = HD+29587
 | NSTED= HD+29587
}}
{{Starbox end}}
'''HD 29587'''是一颗质量、大小与[[太阳]]相似<ref name=Fossati2015/>的[[恒星]]，可能具有一颗[[褐矮星]]伴星<ref name=Mazeh1996/>。HD 29587位于北[[英仙座]]，[[视星等]]为7.29<ref name=Anderson2012/>，不能通过裸眼观测到。根据其每年{{Val|36.3|ul=mas}}的[[恒星视差]]<ref name=GaiaDR2/>，可以推测出HD 29587距离[[太阳系]]约89.8[[光年]]。以太阳为参照系，HD 29587正以+113千米/秒的[[径向速度]]远离地球<ref name=GaiaDR2/>。大约148,000年前，HD 29587距离太阳系的距离曾一度近到大约55.8光年<ref name=Anderson2012/>。HD 29587属于高速[[星族]]<ref name=Fossati2015/>。以[[本地静止标准]]，HD 29587拥有170千米/秒的相对速度<ref name=Hobbs1987/>。

HD 29587的[[恒星光谱]]属于G2 V<ref name=DaSilva2015/>，可划入[[G型主序星]]中。她的质量是太阳的78%，恒星光度大约是太阳的80%，表面[[有效温度]]是5,709[[开尔文|K]]<ref name=DaSilva2015/>。

已发现HD 29587的径向速度会发生变化，因而推测可能有一个环绕HD 29587的天体，半长轴（''a''）与轨道倾角（''i''）正弦值的乘积（''a'' sin ''i''）是{{Convert|14.31|+/-|1.62|Gm|AU|order=flip|lk=on|abbr=on}}<ref name=Halbwachs2000/>。这一天体HD 29587b质量大约是木星的41.0-97.8倍，因此可能是一颗[[褐矮星]]<ref name=Reffert2011/>。

{{OrbitboxPlanet begin|table_ref=<ref name=Reffert2011/>}}
{{OrbitboxPlanet
 | exoplanet = HD 29587 b
 | mass = ≥{{Val|0.78|0.03}}
 | semimajor = ≥{{Val|0.0957|0.0108}}
 | period = {{Val|1474.9|10.2|fmt=commas}}
 | eccentricity = {{Val|0.356|0.095}}
}}
{{Orbitbox end}}

==参考资料==
{{reflist|refs=

<ref name=SIMBAD>{{cite simbad | title=HD 29587 | access-date=2018-08-02 }}</ref>

<ref name=GaiaDR2>{{cite DR2}}</ref>

<ref name=Anderson2012>{{cite journal
 | title=XHIP: An extended hipparcos compilation
 | last1=Anderson | first1=E. | last2=Francis | first2=Ch.
 | journal=Astronomy Letters
 | volume=38 | issue=5 | pages=331 | year=2012
 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
 | arxiv=1108.4971 }}</ref>

<ref name=Mazeh1996>{{cite journal
 | last1=Mazeh | last2=Latham | first2=David W. | last3=Stefanik | first3=Robert P.
 | title=Spectroscopic Orbits for Three Binaries with Low-Mass Companions and the Distribution of Secondary Masses near the Substellar Limit
 | url=https://archive.org/details/sim_astrophysical-journal_1996-07-20_466_1/page/414 | journal=Astrophysical Journal
 | volume=466| pages=415–427 | year=1996 | doi=10.1086/177521
 | bibcode=1996ApJ...466..415M| citeseerx=10.1.1.30.5905 }}</ref>

<ref name=DaSilva2015>{{cite journal
 | display-authors=1 | last1=Da Silva | first1=Ronaldo
 | last2=Milone | first2=André de C. | last3=Rocha-Pinto | first3=Helio J.
 | title=Homogeneous abundance analysis of FGK dwarf, subgiant, and giant stars with and without giant planets
 | journal=Astronomy & Astrophysics
 | volume=580 | pages=A24 | year=2015
 | bibcode=2015A&A...580A..24D | doi=10.1051/0004-6361/201525770 }}</ref>

<ref name=Hobbs1987>{{Cite journal
 | title=The lithium abundance in halo stars
 | last1=Hobbs | first1=L. M. | last2=Duncan | first2=Douglas K.
 | journal=Astrophysical Journal, Part 1
 | volume=317 | date=June 15, 1987 | pages=796–809
 | doi=10.1086/165328 | bibcode=1987ApJ...317..796H }}</ref>

<ref name=Fossati2015>{{cite journal
 | title=The effect of ISM absorption on stellar activity measurements and its relevance for exoplanet studies
 | display-authors=1 | last1=Fossati | first1=L.
 | last2=Marcelja | first2=S. E. | last3=Staab | first3=D.
 | last4=Cubillos | first4=P. E. | last5=France | first5=K.
 | last6=Haswell | first6=C. A. | last7=Ingrassia | first7=S.
 | last8=Jenkins | first8=J. S. | last9=Koskinen | first9=T.
 | last10=Lanza | first10=A. F. | last11=Redfield | first11=S.
 | last12=Youngblood | first12=A. | last13=Pelzmann | first13=G.
 | journal=Astronomy & Astrophysics
 | volume=601 | id=A104 | pages=17 | date=May 2015
 | doi=10.1051/0004-6361/201630339 | bibcode=2017A&A...601A.104F | arxiv=1702.02883 }}</ref>

<ref name=Halbwachs2000>{{cite journal
 | title=Exploring the brown dwarf desert with Hipparcos
 | display-authors=1 | last1=Halbwachs | first1=J. L.
 | last2=Arenou | first2=F. | last3=Mayor | first3=M.
 | last4=Udry | first4=S. | last5=Queloz | first5=D.
 | journal=Astronomy and Astrophysics
 | volume=355 | pages=581–594 | date=March 2000
 | bibcode=2000A&A...355..581H }}</ref>

<ref name=Reffert2011>{{cite journal
 | title=Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: nine confirmed planets and two confirmed brown dwarfs
 | last1=Reffert | first1=S. | last2=Quirrenbach | first2=A.
 | journal=Astronomy & Astrophysics | postscript=.
 | volume=527 | id=A140 | pages=22 | date=March 2011
 | doi=10.1051/0004-6361/201015861 | bibcode=2011A&A...527A.140R
 | arxiv=1101.2227 }}</ref>
}}

{{Stars of Perseus}}

[[Category:英仙座]]
[[Category:恒星]]
[[Category:HD和HDE天體|29587]]