Sh2-308 - emission nebula in Canis Major

          © Velimir Popov & Emil Ivanov 2017
  Size: 2000 px      
Sh2-308 is an emission nebula in the constellation Canis Major. It is located in the central part of the constellation, about 8 ° south of Sirius. It is a big bubble that surrounds the Wolf-Rayet star WR 6, also known as EZ Canis Majoris - a sixth magnitude star. This cloud originated about 70,000 years ago from the material lost by the star explosion, which because of its strong stellar wind has wrapped all around to form a bubble structure. The extension of the cloud is about 6 parsecs (19 light-years) and its distance is estimated at about 575 parsecs (1875 light-years).

Image details:


Center of field RA 06:54:09 (h:m:s)
Center of field DE -23:55:37 (deg:m:s)
Size 1.92 x 1.27 (deg)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is 105 degrees E of N
Charts and image details obtained from
Optic(s): ASA 12" Astrograph @ f/3.6 (Newton)
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Luminance, Red, Green, Blue, Astronomik filters, Ha, OIII Baader filters
Dates/Times: 25-27 Jan., 14-18 Feb. 2017
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L: 7x10, R:7x10 min, G:7x10 min, B:7x10 min, Ha : 18x15, OIII : 20x15 Bin 2, Total Exposure Time - 780 min. (13:00 h)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013 - 2017. All Rights Reserved
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