I just went outside from Draper, Utah at 06 UTC on
October 25, 2007. The comet looks great. I think the
magnitude is closer to 2.2 by comparing with the stars
in Cassiopeia. I hope I'm correct.
Thanks for making this observation possible.
Michael
不得了啦
快到2等了 We have detected brightening here (H45, Petit Jean Mountain in Arkansas, USA)
from about 2.3 (CCD)
to between 2.1 and 2.0 to this time (04:10 UT, Oct. 25). Coma is huge, some
161" arc and nearly
perfectly symmetrical with some indication of scattering due north of center.
Color imaging,
indexed on three G-class stars is indicating a very yellow-green comet, contrary
to some reports of
reddish appearances; curiously the comet does appear somewhat red to the naked
eye.
Our image will be posted shortly.
Clay 今晚就去看！！！
希望还能看到::070821_21.jpg:: 好消息！！！::070821_09.jpg:: ::070821_09.jpg:: 继续再上照片
唉
还要凑字才能发布 如果有尾巴就壮观的大了！
苏兄字数不够可以发表情，哈哈::070821_13.jpg::
新英仙
我在yahoo论坛的内容Just came back from outside. the 17p is as bright as a new bright star
in Per. Naked eye easily find it in the night sky. The constellation
of Perseus changes her figure and I was not able to recognize it at
the beginning!
Observation made just a few minutes ago on Oct 25, 5:10 to 6:15 UT.
Clear sky with almost full moon. Naked eye visibility 4m if away from
the bright moon. To a naked eye, 17p looks like a 2.5 magnitude new
star. Using 6cm retractor, total brightness comparison gives magnitude
2.0 to 1.9. at 76x, the nearly round shape coma measures about 62" by
58" with DC=9. The coma is very bright, easy to distinguish even from
not-so-dark background. Both coma and false nucleus are yellow to
orange color, but my photo shows green halo also. The coma is slightly
elongated in a north-south direction. The false nucleus is 10" by 6",
easily distinct out of coma by its brightness and sharp border. The
nucleus is very dense, stay in the center of the coma (may be off a
little bit) with also elongated in a north-south direction, no tail.
David Z Young
Brenham, TX, USA.
如果猛然看英仙座，我竟然会认不出来，因为它的形状变了，多了一颗星！
我的估计有2等。 该加高亮 看得到尾巴嗎
否則如果看起來很亮感覺不太出是彗星 没有彗尾、彗发的结构，完全是点状光源 经天图
没尾巴的看起来不爽~::luguo:: w我们又有看头了。。。又有彗星来了 刚观测完，亮度约2.5等，我认为有彗发，只不过彗发高度凝结，因为用望远镜观测，在彗核周围有朦胧状物。 原帖由 Sunjune 于 2007-10-25 18:43 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
w我们又有看头了。。。又有彗星来了
有大DOB的好处体现出来了……::070821_01.jpg:: 彗发是慢慢扩散出来的
彗星又比较远，形成一定直径的彗发需要时间，往后凝聚度会逐渐降低，彗发扩散，至于尾，我估计有点困难
彗星亮度剧增13等，这么强烈的爆发，看来彗星上出现了不可思议的灾难，是什么呢？呵呵，未解之迷
从目前的亮度。日彗、地彗距离粗略推算，彗星的绝对星等达到－2等以上，超过了海尔－波普，奇迹。
[ 本帖最后由 suhuasky 于 2007-10-25 21:43 编辑 ] 这该天杀的雾::070821_15.jpg:: 呵呵，肉眼看到了............::070821_04.jpg:: 沈阳大雾。。。