Celestial hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  PK047+42.1
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Abell 39 Planetary Nebula in Hercules, Greg Nelson
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Abell 39 Planetary Nebula in Hercules

Getting plate-solving status, please wait...
Abell 39 Planetary Nebula in Hercules, Greg Nelson
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Abell 39 Planetary Nebula in Hercules

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Description

Beauty in simplicity is defined by Abell 39. This planetary gem is an almost perfect sphere of expanding OIII with almost no hydrogen. I was happy that the OIII filter performed so well despite a waxing gibbous moon.

For Aluma AC4040 users, I used HighStack Pro 60 sec mode and 10 flats were acquired for each filter for each rotator position.

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