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2020-09-26T08:39:56Z

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{{Infobox cluster
| image = [[Image:NGC869NGC884.jpg|320px]]
|caption= 雙星團，NGC 869 (右) 和NGC 884 (左) ，北方在上。
| name = [[NGC天體表|NGC]] 869
| epoch = [[J2000]]
| class = -
| ra = {{RA|02|19.1}}<ref name="simbad">{{cite web
| title=SIMBAD Astronomical Database
| work=Results for NGC 869
| url=http://simbad.u-strasbg.fr/Simbad
| accessdate=2006-12-22
| archive-date=2019-05-01
| archive-url=https://web.archive.org/web/20190501023034/http://simbad.u-strasbg.fr/simbad/
| dead-url=no
}}</ref>
| dec = {{DEC|+57|09}}<ref name="simbad" />
| constellation = [[英仙座]]
| dist_ly = 7.6 [[光年|kly]]<ref name="Slesnick">{{cite journal | url=http://iopscience.iop.org/0004-637X/576/2/880/ | author=Slesnick ''et al.'' | last2=Hillenbrand | first2=Lynne A. | last3=Massey | first3=Philip | title=The Star Formation History and Mass Function of the Double Cluster h and Chi Persei | journal=[[Astrophysical Journal]] | year=2002 | volume=576 | issue=2 | pages=880–893 | doi=10.1086/341865 | bibcode=2002ApJ...576..880S | arxiv=astro-ph/0205130 | access-date=2013-05-28 | archive-date=2020-01-04 | archive-url=https://web.archive.org/web/20200104005537/http://validate.perfdrive.com/captcha?ssa=af101a47-2465-433e-a6bb-b6e56810b07a&ssb=46fhd5k363a3eea6452b01fmz&ssc=http%3A%2F%2Fiopscience.iop.org%2F0004-637X%2F576%2F2%2F880%2F&ssd=706032289737693&sse=ikfokdbhlmknfgn&ssf=c1d3c16fcf8dcfb3ce07cce020648613f4a9cd9a&ssg=54e5ed68-c19f-4f17-8488-dd8d839330fe&ssh=460d6ab5-d485-48f6-8a37-ddee55fac093&ssi=385bd272-8427-4484-948a-448e4c098aad&ssj=d47865d1-f6f2-4f05-ab98-f8c33fcdc3a2&ssk=support%40shieldsquare.com&ssl=092130325494&ssm=43665054768746751106623667659348&ssn=b2b38d0a8f3752ff5a8c1ee9f9044c40b613b5922bee-66ef-4c9d-a805a4&sso=9a0ef451-1500fef8394e005c8a77f40d49c32a8a4b3b8741dfd08c09&ssp=21928745301578020731157808300079995&ssq=12759289933727489596899337176560472400741&ssr=MjA3LjI0MS4yMjUuMjQ2&sss=Mozilla%2F5.0%20%28compatible%3B%20Googlebot%2F2.1%3B%20+http%3A%2F%2Fwww.google.com%2Fbot.html%29&sst=Python-urllib%2F3.5&ssu=Mozilla%2F4.0%20%28compatible%3B%20MSIE%208.0%3B%20Windows%20NT%206.1%29%20Gecko%2F20100101%20Firefox%2F39.0&ssv=9vmuluu2rmln%4014&ssw=&ssx=251059031148881&ssy=fjfcglcohbnfbgiihp%40nmjengmidemejadbcliio&ssz=940f6ad42d9f544 | dead-url=no }}</ref>
| dist_pc = 2.3 [[秒差距|kpc]]<ref name="Slesnick" />
| appmag_v = 3.7<ref name="simbad" />
| size_v = 30′{{Citation needed|date=February 2007}}
| mass_kg =
| mass_msol = -
| radius_ly = -
| v_hb = -
| age = 13 My <ref name="Slesnick" />
| notes = -
| names = Collinder 24,<ref name="simbad" /> Melotte 13,<ref name="simbad" /><br>
h Per,<ref name="simbad" /> h Persei<ref name="simbad" />
}}
'''NGC 869''' 是位於[[英仙座]]的一個[[疏散星团]]，距離7,600[[光年]]<ref name="Slesnick" />，年齡可能有1,300萬年<ref name="Slesnick" />，它和位於英仙座 OB1星協最西邊的疏散星團[[NGC 884]]合稱為[[雙星團]]。這兩個星團相距只有數百光年，在物理上有會相互影響。[[喜帕恰斯]]是最早記錄下這兩個星團的人，但很可能古人早就已經知道這兩個星團。

這個雙星團是業餘天文學家喜愛的目標，經常會使用小型望遠鏡觀察或拍攝。它很容易找到，以裸眼就可以在[[英仙座]]和[[仙后座]]之間看見，在冬季的銀河中間就像是一個明亮的光斑。

在小望遠鏡中，這個星團在富含恆星的星野中呈現出美麗的亮星集團。星團中主要的亮星呈現藍色，但有幾顆橙色的恆星夾雜其中，增添了視覺上的感受。

有時稱它為英仙座h，但這個名稱也可能是指附近某一顆較昏暗的恆星<ref>
Stephen James O'Meara and Daniel W.E. Green, 2003, "The Mystery of the Double Cluster", ''Sky and Telescope'',Vol. 105, No. 2, p. 116-119 (February 2003)</ref>。

== 參考資料 ==
{{reflist}}

{{NGCReference|869}}
*[https://web.archive.org/web/20110903042037/http://www.seds.org/messier/xtra/ngc/n0869.html NGC 869 at SEDS]
*[https://web.archive.org/web/20070927192831/http://www.siowl.com/index.html?NGC869 NGC 869 at Silicon Owl]
*[http://www.messier45.com/cgi-bin/dsdb/dsb.pl?str=NGC869 NGC 869 at Messier45]{{dead link|date=2017年11月 |bot=InternetArchiveBot |fix-attempted=yes }}{{Catalogs|NGC=869}}
{{DEFAULTSORT:NGC 0869}}
[[Category:疏散星團]]
[[Category:英仙座]]
[[Category:NGC天體|0869]]
[[Category:拜耳天體|英仙座 h]]

NGC 869 - 版本历史

imported>InternetArchiveBot：​补救2个来源，并将0个来源标记为失效。) #IABot (v2.0.7

imported>InternetArchiveBot：补救2个来源，并将0个来源标记为失效。) #IABot (v2.0.7