Re: [APML] What lies beneath M78

["tan@home.com" <tan@home.com>]

Mike,

	Very interesting shot. This image is picking up quite a bit of h-alpha in 
the upper right half. I have been wondering how real this red region was 
in my widefield Schmidt shot at

http://www.starryscapes.com/nebula/barnards_loop_n.html

The 6 hours for h-alpha and 4 for RGB is really long. How dark are your 
skies? I presume the light pollution does not hurt the h-alpha much at 
all since it is so narrowband.

Loke





Mike Cook, AF9Y wrote:

> After seeing the Gendler and Loke postings of M78, I was
> inspired to see how deep one could go to show the background
> structure surrounding this area.  Using a 4 hour Ha base and
> 6 hours of RGB the background is beginning to show even
> from my driveway with very polluted southern skies:
> 
> http://www.webcom.com/af9y/m78hrgb.htm
> 
> The upper right edge of this image shows the very weak
> outer edge of Barnard's loop as it ripples into the reflection
> area surrounding M78.  The colors are not spectacular with
> the weak Ha showing a more of a magenta hue as it mixes
> with the reflection nebula and background sky.
> 
> 
> 
> Mike Cook, AF9Y
> http://www.webcom.com/af9y
> mwcook@cris.com
> 
> 
> 
> 
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