Thor's Helmet Nebula
an emission nebula located 12,000 light-years from Earth stretching 30
light-years across. It consists of ionized gases excited by
central star WR7, an extremely hot star about 300,000 times brighter
than our Sun, possibly in a pre-supernova stage. The blue-green color
indicates a high concentration of OIII. North is to the left.
TS-Optics PhotoLine 130mm F7 APO Refractor with Astro-Tech
ATREDT30 Focal-Reducer/Field-flattener, Celestron CI-700 Mount
ZWO ASI1600MMC monochrome with ZWO LRGB filters
QHY5L-IIM through Orion Thin OAG, PHD guiding software
Triad (90) 120 sec @ gain=300, RGB: each channel (10) 120 sec
02-06-2021, Tierra del Sol, CA, good conditions, Traid filter used for
Luminance channel, (T)RGB.