A Faint Planetary Nebula

Something different last night… Instead of going for the brightest non-stellar object in Hercules, I tried one of the faintest, inspired by the picture of it in this month’s Astronomy Now. This is planetary nebula Abell 39 – 25 x 10min frames with the Atik 460ex OSC. The small edge-on spiral galaxy visible at about 10 o’clock relative to the nebula is mag 16.6 PGC58246.

Edit: A couple of nights later I acquired 17 x 10min through an OIII filter, and combined them with the RGB image shown above. This made quite a difference, and made the nebula much more apparent!

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