Re: [APML] The Gum12 SNR and other shots

["Chris Cook" <ccjd@ix.netcom.com>]

Excellent shot Dave!
Shooting a object this far south even from southern AZ is tough and
introduces color gradients.

Chris


----------------------------------
Chris Cook
Astronomical & Nightscape Photography
www.abmedia.com/astro


-----Original Message-----
From: D. Kodama <kodama@alumni.caltech.edu>
To: astro-photo@seds.org <astro-photo@seds.org>
Date: Monday, April 21, 2003 6:38 PM
Subject: Re: [APML] The Gum12 SNR and other shots


>Hello Marco,
>
>Nice shots there from the southern skies.  I also had a
>chance to shoot this SNR object while on a trip last month
>to Arizona with other members of my club.
>
>However, I'm a bit confused about the designation of the
>nebulosity in this region.  On Sky Atlas 2000, it is
>designated Vela SNR and the seemingly larger and brigher
>nebulosity to the SE (Gum?) is not shown.
>
>Meanwhile in the Millennium Star Atlas, it is labeled
>"Gum Nebula" with "Vela SNR" below it in smaller letters.
>I've also seen remarks to the effect that the Gum nebula is
>actually distinct from the Vela SNR.
>
>What is your source for the "Gum 12" designation?  Do you
>know any charts that show the real extent of nebulosity
>in this area?
>
>My shot is here:
>
>   http://www.eanet.com/kodama/astro/2003/0329b/13.htm
>
>It's a single 45-minute 6x7 full frame on E200 (+2 push),
>also using a 4" scope, but at f/4.  Processing was limited
>to contrast boost and color balance, but my colors seem
>odd compared to yours.  I suspect it was due to the fact
>that it is so low on the horizon for me.  I think my
>standard procedure of trying to balance the background
>to a neutral gray is not good where atmospheric extinction is
>strongly affecting the color balance...
>
>Dave Kodama
>
>P.S.  Regarding the HTML/non-HTML issue, below is the original
>    message snipped out of the digest version of the APML.  Even
>    if you have an HTML-compatible viewer, the HTML cannot be
>    properly translated, and the extra text just gets inserted,
>    so I appreciate all who can turn off their HTML message
>    formatting.
>
>
>


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