NGC2359 Thor’s Helmet


Mark Griffith

Swindon, Wiltshire. UK

Celestron C11 Sct, Skywatcher NEQ6 pro mount,Atik 383L+ camera, motorised filter wheel and Astronomik filters.

Dim object in The constellation Canis Major. Rare Wolf-raynet star illuminating this nebula.

Green colour from strong oxygen component.

Tricky object to image because of its low altitude. Used narrowband filters to cut through Swindon’s light pollution and used 2×2 binning.

Image worked out well with nice detail. I was only expecting to capture a hint of the bubble.

Imaged over three nights. My small object imaging setup is overweight for an NEQ6 mount. So had to wait till the nebula passes the meridian. I could the get 80 minutes imaging on the nebula before a neighbour’s chimney gets in the way.

HA/OIII/OIII image with 3 hours and 15 minutes of data. 13 x 7.5min Ha & 13 x 7.5min Oiii.