Store NGC 2359 - Thor's Helmet

This image consists of a total 13 hours and 12 minutes of exposure time from my Bortle 9 backyard on Thor's Helmet, an emission nebula in the constellation Canis Major. The nebula is approximately 3,670 parsecs (11.96 thousand light years) away and 30 light-years in size. The central star is the Wolf-Rayet star WR7, an extremely hot star thought to be in a brief pre-supernova stage of evolution.

Imaging telescopes or lenses: TPO 6" imaging Newtonian f/4

Guiding telescopes or lenses: TPO 6" imaging Newtonian f/4

Guiding cameras: ZWO ASI120mm-Mini

Software: Adobe Photoshop 2020 · PHD2 phd 2 · Fabien Chéreau Stellarium · Incanus Ltd. Astrophotograhy Tool

Filters: Antlia SII 3nm Pro 1.25" · Antlia Ha 3nm Pro 1.25" · Antlia OIII 3.5nm 1.25"

Accessory: ZWO EAF Electronic Auto Focuser · ZWO EFW 31mm 8 positions · Skywatcher Quattro Coma Corrector · ZWO OAG Helical Focuser

Frames:
Antlia Ha 3nm Pro 1.25": 12x150" (30') (gain: 139.00) -15C bin 1x1
Antlia Ha 3nm store Pro 1.25": 99x240" (6h 36') (gain: 139.00) -15C bin 1x1
Antlia Ha 3nm Pro 1.25": 19x300" (1h 35') (gain: 139.00) -15C bin 1x1
Antlia OIII 3.5nm 1.25": 27x120" (54') (gain: 139.00) -15C bin 1x1
Antlia OIII 3.5nm 1.25": 19x150" (47' 30") (gain: 139.00) -15C bin 1x1
Antlia OIII 3.5nm 1.25": 16x240" (1h 4') (gain: 139.00) -15C bin 1x1
Antlia OIII 3.5nm 1.25": 9x90" (13' 30") (gain: 139.00) -15C bin 1x1
Antlia SII 3nm Pro 1.25": 18x240" (1h 12') (gain: 139.00) -15C bin 1x1
Antlia SII 3nm Pro 1.25": 4x300" (20') (gain: 139.00) -15C bin 1x1

Integration: 13h 12'

Darks: ~30

Flats: ~30

Flat darks: ~30

Bortle Dark-Sky Scale: 9.00

Mean SQM: 17.79

Astrometry.net job: 4228514

RA center: 7h 18' 30"

DEC center: -13° 11' 54"

Pixel scale: 0.653 arcsec/pixel

Orientation: -57.977 degrees

Field radius: 0.673 degrees