IC 5146
反射星雲 | |
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發射星雲 | |
業餘者拍攝的f IC 5146 "繭星雲"影像。 | |
觀測資料: {{{epoch}}} epoch | |
赤经 | 21h 53m 28.7s |
赤纬 | +47° 16′ 01″ |
距離 | 3300 ly 光年 |
视星等 (V) | +7.2 |
視尺度(V) | 12′ |
星座 | 天鵝座 |
名稱 | 繭星雲,Caldwell 19,Sh 2-125 |
IC 5146(也稱為科德韋爾19,Sh 2-125,和繭星雲)是位於天鵝座的一個反射[1]/發射[2]星雲和科德韋爾天體。IC 5146特別是指星雲中的星團和Sh2-125[3],它的亮度是+10.0[4]/+9.3[2]/+7.2.[5]。它的天體座標是赤經21h 53.5m,赤緯+47° 16′, 鄰近肉眼可以看見的天鵝座π、蝎虎座的疏散星團NGC 7209,和明亮的疏散星團M39[1][4]。這個星團距離大約4,000光年遠,中心的恆星大約是在10萬年前形成的[6];星雲的視直徑大約12弧分,實直徑相當於15光年[5] 依觀看IC 5146的經驗,暗星雲巴納德168 (B168) 是一個不可分割的目標,它形成一條暗帶環繞著星團,並且投影在西方拖曳在繭星雲的後方。
參考資料
- ^ 1.0 1.1 Eicher, David J. The Universe from Your Backyard: A Guide to Deep-Sky Objects from Astronomy Magazine. AstroMedia (Kalmbach Publishing Company). 1988. ISBN 0-521-36299-7.
- ^ 2.0 2.1 Sanqunetti, Doug. IC 5146 - Cocoon Nebula. dougsastro.net. 2007 [2008-08-06]. (原始内容存档于2008-07-04).
- ^ 存档副本. [2009-08-27]. (原始内容存档于2011-09-30).
- ^ 4.0 4.1 Pasachoff, Jay M. Atlas of the Sky. Stars and Planets. New York, NY: Peterson Field Guides. 2000: 578 pg. ISBN 0-395-93432-X (英语).
- ^ 5.0 5.1 Cannistra, Steve. Cocoon Nebula. starrywonders.com. 2004 [2008-08-06]. (原始内容存档于2013-11-07).
- ^ Nemiroff, Robert; Bonnell, Jerry. APOD: 2002 October 14 - IC 5146: The Cocoon Nebula. APOD (NASA). 2002-10-14 [2008-08-06]. (原始内容存档于2014-08-10). 引文使用过时参数
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外部連結
- SEDS – IC 5146
- Simbad – IC 5146
- NED – IC 5146(页面存档备份,存于互联网档案馆)
- IC5146
- Sharpless Catalog 125
- WikiSky上关于IC 5146的内容:DSS2, SDSS, GALEX, IRAS, 氢α, X射线, 天文照片, 天图, 文章和图片
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