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]

Details

Tele­scope:
Mount:
Cam­era:
Fil­ters:
Expos­ure:
Loc­a­tion:
Author:
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