编辑“︁HD 28185”︁（章节）

==行星系統==
2001年在該恆星旁發現一顆體積與木星相若的[[系外行星]] [[HD 28185 b]]，公轉周期1.04年<ref name="santos"/>。和其他長軌道週期系外行星不同的是，它的[[軌道離心率]]並不高<ref>{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | author=Butler ''et al.'' | title=Catalog of Nearby Exoplanets | journal=The [[Astrophysical Journal]] | volume=646 | issue=1 | pages=505–522 | year=2006 | doi=10.1086/504701 | 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. | bibcode=2006ApJ...646..505B | arxiv=astro-ph/0607493 | access-date=2012-05-26 | archive-date=2009-05-02 | archive-url=https://www.webcitation.org/5gTrfcenD?url=http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | dead-url=no }} ([http://exoplanets.org/planets.shtml web version] {{Wayback|url=http://exoplanets.org/planets.shtml |date=20190305020910 }})</ref>。該行星的[[日射量]]與地球相近，因此該行星如有衛星的話，可能[[行星適居性|適合生命]]存在<ref>{{cite web|url=http://nai.nasa.gov/news_stories/news_detail.cfm?ID=126|title=Extrasolar Planets with Earth-like Orbits|author=Mullen, L.|accessdate=22 July 2006|year=2001|deadurl=yes|archiveurl=https://web.archive.org/web/20060929070638/http://nai.nasa.gov/news_stories/news_detail.cfm?ID=126|archivedate=2006年9月29日}}</ref><ref>{{cite journal|bibcode=2006ApJ...649.1010J|author=Jones, Barrie W.; Sleep, P. Nick; Underwood, David R.|title=Habitability of Known Exoplanetary Systems Based on Measured Stellar Properties|url=https://archive.org/details/sim_astrophysical-journal_2006-10-01_649_2/page/1010|journal=[[The Astrophysical Journal]]|volume=649|issue=2|year=2006|pages=1010–1019|doi=10.1086/506557|arxiv = astro-ph/0603200 }}</ref>。此外，數值模擬顯示可能會有低質量行星長時間穩定存在於該氣體巨行星軌道的[[拉格朗日点|特洛伊點]]上<ref>{{cite journal|bibcode=2007A&A...474.1023S|title=Survey of the stability region of hypothetical habitable Trojan planets|author=Schwarz, R.; Dvorak, R.; Süli, Á.; Érdi, B.|journal=[[Astronomy and Astrophysics]]|volume=474|issue=3|pages=1023–1029|doi=10.1051/0004-6361:20077994|year=2007}}</ref>。HD 28185 b 於2008年由[[麥哲倫行星搜尋計畫]]確定其存在<ref>{{cite journal | title=Low-Mass Companions for Five Solar-Type Stars From the Magellan Planet Search Program | journal=[[The Astrophysical Journal]] | url=http://iopscience.iop.org/0004-637X/693/2/1424/fulltext | year=2009 | volume=693 | issue=2 | pages=1424–1430 | doi=10.1088/0004-637X/693/2/1424 | display-authors=1 | last1=Minniti | first1=Dante | last2=Butler | first2=R. Paul | last3=López-Morales | first3=Mercedes | last4=Shectman | first4=Stephen A. | last5=Adams | first5=Fred C. | last6=Arriagada | first6=Pamela | last7=Boss | first7=Alan P. | last8=Chambers | first8=John E. | bibcode=2009ApJ...693.1424M}}</ref>。

HD 28185也有長時期徑向速度變化趨勢的證據，可能代表有另一顆週期更長的行星存在<ref>{{cite journal|author=Chauvin, G.; Lagrange, A.-M.; Udry, S.; Fusco, T.; Galland, F.; Naef, D.; Beuzit, J.-L.; Mayor, M.|year=2006|journal=[[Astronomy and Astrophysics]]|volume=456|issue=3|pages=1165–1172|title=Probing long-period companions to planetary hosts. VLT and CFHT near infrared coronographic imaging surveys|bibcode=2006A&A...456.1165C|doi=10.1051/0004-6361:20054709|arxiv = astro-ph/0606166 }}</ref>。

{{OrbitboxPlanet begin
| table_ref = <ref name="santos"/>}}
{{OrbitboxPlanet
| exoplanet = [[HD 28185 b|b]]
| mass = ≥5.7
| period = 383 ± 2
| semimajor = 1.031 ± 0.060
| eccentricity = 0.07 ± 0.04
}}
{{Orbitbox end}}