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Hi everyone, I'm resurrecting this thread to say I now have some doubt about what I saw, and whether it was the nebula itself. I had another view last night that repeated what I saw before.

Appearance was a small gray "nebulosity" similar to a small galaxy with no core and no embedded stars. The Meade Narrowband filter did not help, in fact wiped it out.

However, looking more closely at many photos, there are four closely spaced stars with some relatively bright nebulosity at that location.

So now I wonder if I just saw the effects of the 4 stars? Or was it indeed nebulosity?


I marked up a DSS photo, it doesn't show the 4 stars, but does mark the spot. Mods, hope it is OK to use DSS photos.

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I think you saw it. I have seen it in my 10 inch as an irregular glow with two involved stars somewhat separated and one having a little more nebulosity around it than the other. I had the most luck with the nebula using the Lumicon Deep-sky filter, as the UHC seemed to help only very slightly over no filter. Just as a note, the "Cave Nebula" is Sh2-155, and while it is the 9th object in Moore's list, it should really not be given a "Caldwell number", as that is not an official astronomical catalog designation. Clear skies to you.

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David W. Knisely
Hyde Memorial Observatory
http://www.hydeobservatory.info

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