NGC 2359 ( Sh2-298, Thor's Helmet) in Canis Mayor

© Velimir Popov & Emil Ivanov 2020
Size: 1800 px

NGC 2359 (also catalogued as Sh2-298 and called Thor's Helmet) is an emission nebula in the constellation Canis Major. It is approximately 15,000 light-years away from Earth and its size is approximately 30 light years. The central star is an extremely hot Wolf-Rayet star, a giant thought to be in a pre-supernova stage of its evolution. The Thor's Helmet is similar in nature to the Bubble Nebula, but interactions with a nearby large molecular cloud probably have contributed to its more complex shape and structure.


Image details:


Center of field RA 07:18:34 (h:m:s)
Center of field DE -13:12:56 (deg:m:s)
Size 42.6 x 30.5 (arcmin)
Pixel scale: 1.42 (arcsec/pixel)
Orientation: Up is 0.93 degrees E of N
Charts and image details obtained from
Optic(s): 12" ASA Astrograph at F/3.6
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Luminance, Red, Green, Blue, Astronomik filters
Dates/Times: 31.Oct. 2011
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L:6x10 min,;R:6x10 min, G:6x10 min, B:6x10 min; Bin 1 Total exp.time: 240 min. (4 hrs)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2020. All Rights Reserved
click tracking