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tatarjj
scholastic sledgehammer
Reged: 04/20/04
Posts: 905
Loc: Auburn, AL
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Re: Cave Nebula (Caldwell 9) finally saw a piece
07/29/08 01:32 PM
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Well, tight stars can often give the illusion of nebulosity, and the fact that a narrowband filter wiped it out doesn't help you much. My experiences with this nebula have always been that it's a rather largish object, the best visible portions being maybe 15'-30' across- I can't remember off the top of my head. I can't remember ever trying for the object WITHOUT a nebula filter. If you actually did see something it had to have been some reflection nebulosity, which might not necessarily count as seeing Sh2-155 itself. Just keep at it- Sh2-155 is faint, but it IS observable with a narrowband filter and decently large scope.
As for posting the POSS/DSS images, from my experience here, make sure you say explicitly where you got them and say it again and again every time you post a POSS image, otherwise the moderators may come down on you. It's not ok to just say they are from the POSS.
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John T.
Auburn, AL
25" f/4.2 Dob
18" Obsession #701
4" Stellar Vue Achromat
8X56 Binos
Edited by tatarjj (07/29/08 01:46 PM)
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