piling it up

by Richard Crisp

those pillars keep rising this time of year. they get tall after 2am in Castro Valley, like they did last night.

I logged 2.5 hours of halfway decent exposure before dawn.

I am using a different set of emission line filters for this image than I have used in the past. for some reason the colors just don't come out the same. Maybe I can work on that some more and get a color balance that is closer to the Hubble image.

I used my 18" f/12.6 classical cassegrain to take the image. It was the first time I have used it in months. The seeing was OK but not great. I was getting stars in the high 3s earlier in the evening and then it degraded to mid 4s. As a result the image is a little blurry looking. This would be awesome in sub 2 arc-sec like I had back in late Nov and early Dec.

At 5760mm focal length seeing makes all the difference.

http://www.narrowbandimaging.com/m16_rdc18_6303_s2hao3_ad_page.htm

Posted on sf-bay-tac May 22, 2005 12:41:30 PT
Converted by report.pm 1.2 Sep 20, 2005 13:16:44 PT