Thor’s Hel­met (NGC 2359)

Thor's Helmet (NGC 2359) - Astrophotography Martin Rusterholz

NGC 2359 is an emmission/​reflection neb­ula excited by the power­full wind of the 11.4 mag Wolf-Rayet Star HD 56925 (WR7) at a dis­tance of about 1600 lightyears. At this dis­tance, the true dia­met­er of the fil­a­ment­ary bubble meas­ures about 230x120 lightyears.

This image is com­posed of long exposed nar­row­band (Ha/​OII) plus strong col­or (RGB) data and was choosen as APOD.

[descrip­tion from O’Meara]


RCOS 20″ f/8.5
Para­mount ME
Apo­gee U16M
Astro­don Gen2
HaOIIIR­GB 660:720:180:180:180 min.
Sierra Remote Obser­vat­or­ies, Cali­for­nia USA
© Mar­tin Ruster­holz, Astrophotographer

Find­er Chart Thor’s Hel­met (NGC 2359)

Thor's Helmet (NGC 2359) Sky Chart - Astrophotography Martin Rusterholz

Image cre­ated by Skychart

About Me

Hello, my name is Martin Rusterholz. I’m a Swiss amateur astrophotographer living near Zurich, the biggest town in Switzerland. My interest in astronomy started when I was 16. At that time, I built my first Newtonian telescope and mount. I studied physics at the Swiss Federal Institute of Technology (ETH) which was the only study including at least some aspects of astronomy and astrophysics. “Looking at the nights sky is an experience touching everybody deeply inside, something common to all human beings independent to the language spoken by the individuals”. Deep-sky astrophotography is my passion.