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NGC 7662 目录 圖集 相關條目 參考資料 外部連結 导航菜单23h 25m...

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行星狀星雲仙女座NGC天体科德韦尔天体


仙女座行星狀星雲折射鏡












NGC 7662




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NGC 7662

Ngc7662hst.jpg

哈伯太空望遠鏡 (HST)的NGC 7662影像。
Credit: HST/NASA/ESA[1]

觀測數據
(曆元 J2000)
赤經
23h 25m 54s[2]
赤緯
+42° 32′ 6″[2]
距離地球

~5000 光年

視星等 (V)

9
視直徑 (V)
37″
所屬星座
仙女座
物理屬性
半徑 (光年)
0.8 ly
其他名稱
PK 106-17 1, GCRV 14695, PN ARO 20, 科德韋爾22

參看:行星狀星雲、星雲列表

天球赤道座標:星图23h 25m 54s,+42°32′6″

NGC 7662,也稱為藍雪球星雲科德韋爾22,是位於仙女座的一個行星狀星雲。這個星雲的真實距離並不很精確,依據Skalnate Pleso星表 (1951)是1,800光年,直徑20,00天文單位。稍後,C.R.O'Dell (1963)測量的距離是1,740秒差距或大約5,600光年,真實的大小也增加至0.8光年或大約50,000天文單位。在它的中心可以看見一顆暗淡的恆星,光度在12-16等之間[3]。中心的恆星是一顆藍矮星,有著連續光譜,計算逤得的溫度是75,00K。這是所知的行星狀星雲中,中心恆星溫度最高的一顆[4]


NGC 7662是一顆很受業於觀測者喜愛的星雲,一架小的折射鏡就可以解析出恆星和輕微的雲氣。以6吋鏡放大100倍觀察,將可以看見藍色的盤狀。使用16吋或更大的口徑,可以看內部細微的顏色和亮度變化。




目录






  • 1 圖集


  • 2 相關條目


  • 3 參考資料


  • 4 外部連結





圖集




相關條目



  • NGC天體列表

  • 行星狀星雲



參考資料





  1. ^ The Hubble European Space Agency Information Centre Hubble picture of NGC 7662 互联网档案馆的存檔,存档日期2007-09-27.


  2. ^ 2.02.1 SIMBAD Astronomical Database. Results for NGC 7662. [2007-04-10]. 


  3. ^ Blue Snowball Nebula (NGC 7662). Internet Encyclopedia of Science. [2008-10-11]. 


  4. ^ Planetary nebula NGC 7662 in Andromeda. Kopernic Observatory. [2008-10-11]. 




外部連結






  • WikiSky上关于NGC 7662的内容:DSS2, SDSS, GALEX, IRAS, 氢α, X射线, 天文照片, 天图, 文章和图片








取自“https://zh.wikipedia.org/w/index.php?title=NGC_7662&oldid=47205378”










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