Abell 82 planetary unknown

Abell 82 is at the very end of the list of popular astroimaging targets. This planetary nebula has apparent size similar to size of well known M57 Ring nebula, but Abell 82 is much, much fainter object. Distance to this nebula is estimated to 1,000 light years. It is not well examined object. According to https://www.aanda.org/articles/aa/full_html/2011/02/aa13984-09/T4.html page, its central star is supergiant of spectral typ K0. But this kind of star would not be able to excite surrounding nebula to shine in Ha and Oiii wavelengths – it requires more UV light. K0 type star also could not born planetary nebula, because when PN is created, central star rejects its outer shell and become white dwarf, and K0 supergiant still contains these outer part. It is possible, that this K0 supergiant is a binary star with companion of white dwarf – planetary nebula origin.

Image itself can be found in Cassiopeia – close to NGC7789 Caroline’s Rose open cluster. 

Abell 82 planetary nebula
Abell 82 planetary nebula

Large version https://astrojolo.com/wp-content/uploads/2018/10/2018-10-05-A82.jpg

Abell 82 inverted Ha image 1:1 crop
Abell 82 inverted Ha image 1:1 crop

Clear skies!

Image technical data:

Date: 30.09, 05.10.2018
Location: Nieborowice, Poland
Telescope: Meade ACF 10"
Corrector: AP CCDT67
Camera: QHY163M, gain 100
Mount: SW EQ6
Guiding: SW 80/400 + ASI290MM
Exposure: RGB 35:25:30 x 30 seconds, Ha 95 x 300 seconds, Oiii 45x300 seconds
Conditions: seeing average, transparency average

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