编辑“︁UDFj-39546284”︁

{{Sky|03|32|39.54|-|27|46|28.4|10000000000000}}
{{Infobox Galaxy
| name = UDFj-39546284
| image = [[File:UDFj-39546284-hs-2011-05-c.jpg|250px|]]
| caption= [[哈勃望远镜]]拍到的UDFj-39546284照片
| credit =
| constellation name = [[天炉座]]
| epoch =
| type =
| ra = {{RA|03|32|39.54}}<ref name="Bouwens">{{cite web
  |author=R.J. Bouwens, G.D. Illingworth, I. Labbe, P.A. Oesch, M. Carollo, M. Trenti, P.G. van Dokkum, M. Franx, M. Stiavelli, V. Gonzalez, D. Magee
  |title=A candidate redshift z ~ 10 galaxy and rapid changes in that population at an age of 500 Myr
  |publisher=Astrophysical Journal
  |url=http://arxiv.org/abs/0912.4263
  |access-date=2011-01-27
  |archive-date=2021-04-27
  |archive-url=https://web.archive.org/web/20210427235448/https://arxiv.org/abs/0912.4263
  |dead-url=no
  }}</ref>
| dec = {{DEC|-27|46|28.4}}<ref name="Bouwens"/>
| z = ~10.3<ref name="Bouwens"/>
| dist_ly = ~132亿[[光年]]
| appmag_v = V fainter than 30.1<ref name="Bouwens"/><br />H<sub>160</sub> = 28.92 ± 0.18<ref name="Bouwens"/><br />[[J band|J]]<sub>125</sub> - [[H band|H]]<sub>160</sub> > 2<ref name="Bouwens"/>
| size_v =
| names = 
}}

'''UDFj-39546284'''是一个位于[[天炉座]]，距离地球132亿[[光年]]的[[星系]]，也就是说该星系形成于[[宇宙大爆炸]]之后4.8亿年。在2011年至2012年曾经是人类史上观测到的最古老的星系。体积是[[银河系]]的百分之一<ref name=sciencenet>{{cite news|author=叶孤城|title=哈勃观测到诞生于宇宙大爆炸后4.8亿年的星系|url=http://news.sciencenet.cn/htmlnews/2011/1/243415.shtm?id=243415|accessdate=2011-01-27|newspaper=科学网|date=2011-01-27|archive-date=2020-12-02|archive-url=https://web.archive.org/web/20201202081914/http://news.sciencenet.cn/htmlnews/2011/1/243415.shtm?id=243415|dead-url=no}}</ref> 。

该星系由[[哈伯太空望遠鏡]]上的[[第三代廣域照相機]]（WFC3）探测到<ref name=sciencenet />，美国和欧洲的研究人员在[[哈伯超深空]]数据中发现了这个[[红移]]值z≈10的星系<ref name="Bouwens" />，其后持续修正至11.58，但和[[UDFy-38135539]]不同的是UDFj-39546284未经[[光谱学|光谱]]证实<ref name="heic1103">{{cite web |date=26 January 2011 |title=Hubble finds a new contender for galaxy distance record |publisher=Space Telescope (heic1103 - Science Release) |url=http://www.spacetelescope.org/news/heic1103/ |accessdate=2011-01-27 |archive-date=2012-07-27 |archive-url=https://www.webcitation.org/69TZjQ0zS?url=http://www.spacetelescope.org/news/heic1103/ |dead-url=no }}</ref>。

=== 图集===
<gallery>
File:Hudf09z10nl.png|UDFj-39546284
File:UDFj-39546284.tif|UDFj-39546284
File:hudf-illustration.jpg|
</gallery>

== 参考文献 ==
{{Commons|Category:UDFj-39546284}}
<div class="references-small">
<references></references>
</div>

{{start box}}
{{s-records}}
{{Succession record holder box|[[UDFy-38135539]]|[[BDF-3299]]|[[星系列表|最遙遠星系]]|2011年－2012年}}
{{end}}
{{2011年太空活動}}

[[Category:遥远星系]]
[[Category:天炉座]]