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Well, mine has selective processing too...I have been using the technique for blending Ha described by Tony Hallas in the link you sent earlier.
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On 11/20/2019 6:45 PM, Dan Crowson wrote:
This is fantastic. This is the deepest Sh2-223 I've found. I went back and looked at mine and it doesn't have any of the stuff 'inside'. You have more than Dean's and I tend to think his have a lot of selective processing.
From: ASEMDigitalSIG@groups.io [mailto:ASEMDigitalSIG@groups.io] On Behalf Of Gregg Ruppel
Sent: Wednesday, November 20, 2019 7:38 PM
To: EurekaObsClub@groups.io; main@STLAstronomy.groups.io; ASEMDigitalSIG <ASEMDigitalSIG@groups.io>; taaaforum@...; DSNM <DarkSkyNewMexico@groups.io>
Subject: [ASEMDigitalSIG] Sh2-223 and visitor
Sh2-223 is a large but faint emission nebula in Auriga; when I started imaging it I noticed that comet c2017 T2 PanSTARRS was going to pass in front of it on November 18 and 19.
Image data here:
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/