About image
NGC 246 is a planetary nebula visible in the constellation of the Whale.
Also known as the Skull Nebula, it is quite large (4.6 'x 4.1') and bright: the disc is irregular and shows traces of a ring structure.
The central star is 12th magnitude and the actual diameter of the nebula it created is about 6 light-years.
The distance from the Sun is estimated at 2100 light-years.
Technical data
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 LRGB
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details L 24x300" bin3 -15C
R 10x300" bin3 -15C
G 10x300" bin3 -15C
B 11x300" bin3 -15C
Total integration 4h35'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8,
Photoshop CS5, StarXTerminator, NoiseXTerminator
SQM-L 21.06
Location Promiod (Aosta
Valley, Italy), own remote observatory
Date 19/20/22 September 2022