narrow band 新人- NGC6888也合成成功!!!!
CCD和WO FR III的距离还是不太对,看来要找个短一点的延长管了,不管这么多了,先正式拍个试一下:Atik 16HR 2/3 format CCD
WO FR III
SV 105
CGE
H-Alphia:20分钟单张 X 10
O III: 30分钟单张X8
SII: 不计划拍了, NGC6888 的SII发射波段不强
两晚共7小时20分曝光, dark, flat bias 还没时间弄
先把张R: Ha G: 50% OIII, B:50% OIII 的合成图放上. 还有回黄兄, 我用MaximDL 的 color stack 上色的
[ 本帖最后由 UB0423 于 2008-7-12 15:27 编辑 ] 是弥漫星云,还是行星状星云,还是超新星遗迹,怎么感觉都有点像 问的好啊。。。查了一下,应该是算发射星云。有强烈的Ha和OIII发射波段
引用WIKIPEDIA:
“The Crescent Nebula (NGC 6888 or Caldwell 27) is an emission nebula in the Cygnus constellation, about 5000 light years away. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray emitting temperatures." 强!要是彩色的就好看了~::070821_13.jpg:: 很好,我放大看了,reducer和CCD的距离不对. 呵呵
不错::070821_04.jpg:: ngc 6888 也弄好了草稿, 先放上来, ::070821_09.jpg:: 多小時的心血作品。
頂! 强啊::070821_13.jpg:: 加油
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