NGC2359 Thor’s Helmet


Mark Griffith

Swindon, Wiltshire. UK

Teleskop service 12″ Richey-Chretien telescope, Skywatcher EQ8 mount,Atik 383L+ camera, Astronomik Ha, Oiii filters.

Dim object in The constellation Canis Major. Green colour from strong oxygen component.

Tricky object to image because of its low altitude. Only visible for two hours per night from my backgarden.

Used narrowband filters to cut through Swindon’s light pollution.

Setup my mono camera with 2×2 binning to boost the signal and keep sub exposures times dowm to 10 minutes.

Slighly boosted the hydrogen alpha with a red channel curve adjustment in photoshop.

Large number of stars in this part of the sky. Stopped them overpowering the image by reducing the stars’ size by four pixels in processsing software.

Data collected on five nights. 2nd, 3rd, 10th, 14th & 15 February 2016.

Ha/Oiii/Oiii image with 4 hours 20 minutes of data. 12 x 10min Ha, 14 x 10min Oiii 2×2 binning.