Hemisphere:  Southern  ·  Contains:  The star ο1CMa
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Sh2-308 - Deep Sky West Remote Observatory, 



    
        

            Deep Sky West (Lloyd)
Sh2-308 - Deep Sky West Remote Observatory
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Sh2-308 - Deep Sky West Remote Observatory

Link to TIFF/FITS: http://www.deepskywest.com

Technical card

Imaging telescopes or lenses: AG Optical 12.5" iDK

Imaging cameras: Finger Lakes Instrumentation FLI ML 16803

Mounts: Astro-Physics 1100GTO

Guiding telescopes or lenses: AG Optical 12.5" iDK

Guiding cameras: Lodestar

Software: PixInsight 1.8  ·  Software Bisque The Sky X Pro  ·  Focus Max  ·  Cyanogen Maxim DL5 ver. 5.24

Filters: Astrodon Red Tru-Balance E-Series Gen 2  ·  Astrodon 5nm OIII  ·  Astrodon Blue Tru-Balance E-Series Gen 2  ·  Astrodon Green Tru-Balance E-Series Gen 2  ·  AstroDon 5nm H-Alpha filter


Dates:April 7, 2018

Frames:
AstroDon 5nm H-Alpha filter: 20x1800" bin 1x1
Astrodon 5nm OIII: 30x1800" bin 1x1
Astrodon Blue Tru-Balance E-Series Gen 2: 12x600" bin 1x1
Astrodon Green Tru-Balance E-Series Gen 2: 12x600" bin 1x1
Astrodon Red Tru-Balance E-Series Gen 2: 12x600" bin 1x1

Integration: 31.0 hours

Avg. Moon age: 21.42 days

Avg. Moon phase: 57.69%


Basic astrometry details

Astrometry.net job: 2040813

RA center: 6h 54' 24"

DEC center: -23° 54' 46"

Pixel scale: 0.874 arcsec/pixel

Orientation: 89.983 degrees

Field radius: 0.703 degrees


Resolution: 1824x1824

Locations: Deep Sky West Remote Obsevatory (DSW), Rowe, New Mexico, United States

Description

Sh2-308 @DeepSkyWest on AG Optical iDK 12.5" (personal system). From APOD....

Blown by fast winds from a hot, massive star, this cosmic bubble is huge. Cataloged as Sharpless 308 it lies some 5,200 light-years away in the constellation Canis Major and covers over 2/3 degree on the sky (compared with 1/2 degree for the Full Moon).

That corresponds to a diameter of 60 light-years at its estimated distance. The massive star itself, a Wolf-Rayet star, is the bright blue one near the center of the nebula. Wolf-Rayet stars have over 20 times the mass of the Sun and are thought to be in a brief, pre-supernova phase of massive star evolution.

Fast winds from this Wolf-Rayet star create the bubble-shaped nebula as they sweep up slower moving material from an earlier phase of evolution. The windblown nebula has an age of about 70,000 years. Relatively faint emission captured in the expansive image is dominated by the glow of ionized oxygen atoms mapped to bluish hues.

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)

Comments

Author

sixburg
Deep Sky West (Lloyd)
License: Attribution-NonCommercial-NoDerivs Creative Commons
112530
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Sh2-308 - Deep Sky West Remote Observatory, 



    
        

            Deep Sky West (Lloyd)