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Two Planetary Nebula


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I would prefer to call them diagrams rather than sketches ahem!

NGC 40 / ARO 1 and Herschel IV-58



...and IC 2149 / ARO 23. This latter one i find interesting as a demonstration of what this O-III filter does and doesn't do. The star HD 39863 is hardly diminished by the filter so field ID still key to really identifying the stellar PNe.



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