Sh2-308 Emission Nebula in Canis Major

Sh2-308 (Sharpless 308) is an 35´x 35´arcmin. large emission nebula in the constellation of Canis Major,the light source of which is the Wolf-Rayet-Star WR6 (=EZ Can.Maj.) at the top left of our picture.

This star is a very hot and bright one and their is some evidence,that it might explode some day as a supernova.

This star lost a huge gas cloud about 70.000 years ago,which no form this beautiful emission nebula,mainly emitting light in the wavelenght of OxygenIII.The distance from us is about 4500 light-years,but the right value is something uncertain.

Our maximum FOV with the FLI-camaera is a squared 22,5´arcmin.,therefore we only show the brightest part of this bubble here.Sh2-308 is also nicknamed as "Dolphin-Nebula".


position (epoch 2000):

Ra.: 06h 54m 13s
Decl.: -23° 55′ 42″


image data:

L = synth. from all RGBs
RGB= 7 x 1200s each
OIII = 8 x 2400s (mixed to G and B)

a total of 7.6 hours

80cm f/7 AstroOptik Keller corrected cassegrain

FLI Proline 16803 Astrodon LRGB GenII filters

Prompt 7 CTIO/UNC Chile,remote controlled

image processing: Bernd Flach-Wilken


Here you see the brightest part of the Sh2-308 Emission-Nebula-Bubble in a 21´x21´ FOV.

The bright blue star to the top left of this photo is the Wolf-Rayet star WR6 (=EZ CanMaj.)

For full resolution click HERE

HERE you can see the full extension of th Bubble Sh2-308 (Irida Observatory)


Last modified on Thursday, 04 February 2021 11:52

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