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Contains:  The star ο1CMa
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Sharpless2-308 in HaOIII Mosaic

Technical card

Resolution: 2456x2772

Frames:
Astrodon 3nm OIII: 31x1800" -25C bin 1x1
Astrodon Ha 5nm Ha 5nm: 26x1800" -25C bin 1x1

Integration: 28.5 hours

Astrometry.net job: 1470869

RA center: 6h 54' 31"

DEC center: -23° 55' 15"

Pixel scale: 1.090 arcsec/pixel

Orientation: -6.260 degrees

Field radius: 0.561

Locations: Tebbutt Observatory, Edgewood, New Mexico, United States

Data source: Backyard

Description

Sharpless 2-308 in HaOIII. Sh2-308 is a bubble nebula associated with a Wolf-Rayet star (SAO 172546, HD 50896, WR6 or EZ CMa, the bright star left of center). It is about 6000 light years away in the constellation Canis Major. At this distance its angular diameter subtends around 19 parsecs across.

OIII dominates this nebula, although there is quite a bit of Ha along the western limb and the background. Due to the low elevation, it took about 4 months to obtain the subframes for this image, sometimes taking just a pair of OII or Ha frames a night. This is a two frame mosaic and the cropping was a bit tight as I had a slight rotation in my frames of about 6 degrees.

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Author

fbzolt
Frank Zoltowski
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Sharpless2-308 in HaOIII Mosaic, 





    
        

            Frank Zoltowski