PN Abell 78

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200%  crop (0.2MB)

DSLR widefield image

Object data of PN Abell78

Object type: Planetary nebula
Size: 2.0'
Magnitude: 16 mag
Constellation: Cyg
Distance: 5,000 Ly
Notes: Abell 78 is a planetary nebula in constellation Cygnus. It has the unusual property of having a faint outer halo composed of normal stellar material (mostly hydrogen) and a bright inner elliptical ring composed mostly of helium. The helium ring provides direct confirmation that hydrogen is being converted to helium in the centers of stars and can later be ejected back into the galaxy's pool of gas for building another generation of enriched stars.

Exposure data

Date: 2020-08-10 until 2020-08-26 (7 nights)
Location: Nussbach / Austria (400m)
Telescope: 12" Newtonian telescope (f=1120mm)
Camera: QSI 660wsg-8 with Astrodon filters
Binning: L 1x1 / RGB 1x1 / Ha 5nm 1x1 / [OIII] 3nm 1x1
Mount: ASA DDM85
Exposure time: L 60x2min / RGB 20x2min each / Ha 73x8min / [OIII] 73x8min
Exposure time total: 23h 28min