编辑“︁S Ori 52”︁

'''S Ori 52'''是位於[[獵戶座]][[參宿三]]星團（獵戶座δ星團）中，[[恆星分類#冷且紅和棕矮星類型|光譜類型L]]，性質尚不確定的一個天體。首度觀測到它的是[[毛納基山]]的[[凱克望遠鏡]]<ref name="Osorio">[http://www.sciencemag.org/content/290/5489/103.abstract "Discovery of Young, Isolated Planetary Mass Objects in the σ Orionis Star Cluster" by M. R. Zapatero Osorio, V. J. S. Béjar1, E. L. Martı́n, R. Rebolo1, D. Barrado y Navascués, C. A. L. Bailer-Jones and R. Mundt in ''Science'' 6 October 2000 Vol. 290 no. 5489 pp. 103-107 ] {{Wayback|url=http://www.sciencemag.org/content/290/5489/103.abstract |date=20130905184139 }} {{doi|10.1126/science.290.5489.103}}</ref>，估計它的質量在2-8[[木星]]質量之間<ref>{{Cite web |url=http://books.google.com/books?id=S_Sh1i226wwC&pg=PA433 |title=Stellar Spectral Classification, by Richard O. Gray and Christopher J. Corbally (page 433) |accessdate=2014-08-10 |archive-date=2014-06-30 |archive-url=https://web.archive.org/web/20140630153033/http://books.google.com/books?id=S_Sh1i226wwC&pg=PA433 |dead-url=no }}</ref>。這個天體的確切性質仍有爭議，研究顯示它可能是[[次棕矮星]]<ref name="Osorio"/>，一顆[[星際行星|流浪行星]]<ref name="Osorio"/>，或這只是單純已經衰老的棕矮星，躺在星群之前的前景星<ref>{{cite web |url=http://adsabs.harvard.edu/abs/2004ApJ...604..827B |title=S Orionis 70: Just a Foreground Field Brown Dwarf? |publisher=Adsabs.harvard.edu |date= |accessdate=2013-11-16 |archive-date=2017-08-28 |archive-url=https://web.archive.org/web/20170828034330/http://adsabs.harvard.edu/abs/2004ApJ...604..827B |dead-url=no }}</ref>。

== 參考資料 ==
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{{Stars of Orion}}

[[Category:獵戶座]]
[[Category:棕矮星]]


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