Abell 84 (also called PK 112-10) is a planetary nebula in Cassiopea: it has dimensions 147”x114” and magnitude 14.40.
It is rarely imaged by amateur astrophotographers: also on Internet there aren't so many references.
The nebula however shows an interesting bipolar structure with two lobes of Ha emission surrounding a “bubble” with main emission in OIII wavelenght but with also some Ha inside.
Several remote galaxies are visible in the background.
Optic GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted RGB and Ha 5nm, OIII 5nm
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details R 13x300" bin3 -15C gain 100
G 13x300" bin3 -15C gain 100
B 13x300" bin3 -15C gain 100
Ha 40x300" bin3 -15C gain 100
OIII 24x300" bin3 -15C gain 100
Total integration 8h35'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 6/7/8 October 2023