I've sat on this data set for a couple months now, I was never really happy with the first couple iterations that I produced, and part of me intended to spend more time and turn this into a mosaic. There was also a small discovery that I found in my data that is not cataloged. Unfortunately, it's not a planetary nebula, nor is there any white dwarf nearby, but it is a structure of interstellar matter that so far only appears in the Ha data, and honestly it didn't even show up until I hit at least 20 hours.
The structure is centered around TYC3715-686-1 and appears to be a halo. One would easily pass this off as such due to its perfectly round nature, only there's no halos around other stars, so clearly this is not an optical defect. The following image is the raw 21 hour stack of Ha data, annotated with the ISM centered. This discovery is nowhere as neat, or respectable as finding a PN, but it still has a cool factor nonetheless.
The following data was provided by
@Justin Tolboe , which is approximately 44 hours of Ha data between him and another individual who is unfortunately not on Astrobin. His data set taken with an Espirit 80, IMX571 and Antlia filters clearly displays the same bubble around TYC3715-686-1, thus confirming the small discovery. You can see his full image here:
https://astrob.in/qvee86/B/
Anyways, since this discovery is not something that can be catalogued through normal means, for now it will go into the Sight Seeing Catalog created by
@Thrayn and
@Lyaphine for small targets such as this.
Hope you enjoy the image. Clear skies!
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