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Hemisphere:  Southern  ·  Contains:  The star ο1CMa

Image of the day 02/18/2016

Getting plate-solving status, please wait...
    Sh2-308, 



    
        

            rflinn68
    Sh2-308
    Powered byPixInsight

    Sh2-308

    Technical card

    Imaging telescopes or lenses: Teleskop Service TS Photoline 107mm f/6.5 Super-Apo

    Imaging cameras: SBIG STF-8300M

    Mounts: Orion HDX110

    Guiding telescopes or lenses: Teleskop Service TS Photoline 107mm f/6.5 Super-Apo

    Guiding cameras: QHY5L-II Mono

    Software: Sequence Generator Pro  ·  Adobe Photoshop CS4  ·  Annie's Astro Actions  ·  Astrometry.net Local Solver  ·  PixInsight  ·  EQASCOM  ·  Stark Labs PHD2 v2.5.0  ·  Cartes du Ciel  ·  Elbrus  ·  ProDigital Software Carbonis Actions

    Filters: Astrodon 5nm OIII  ·  Astrodon 5nm H-alpha

    Accessory: Teleskop Service TSFlat2 field flattener  ·  Starlight Xpress Slimline OAG  ·  Starlight Xpress SX USB Filter Wheel 7x36mm  ·  Dew-Not heater strip  ·  Rigel nStep  ·  Ronald J. Keating Jr DewBuster Controller


    Dates:Feb. 4, 2016Feb. 12, 2016

    Frames:
    Astrodon 5nm H-alpha: 25x1200" bin 2x2
    Astrodon 5nm OIII: 23x1200" -20C bin 2x2

    Integration: 16.0 hours

    Darks: ~14

    Flats: ~30

    Bias: ~100

    Avg. Moon age: 14.79 days

    Avg. Moon phase: 19.49%


    Basic astrometry details

    Astrometry.net job: 961551

    RA center: 6h 54' 25"

    DEC center: -23° 52' 33"

    Pixel scale: 1.586 arcsec/pixel

    Orientation: -0.254 degrees

    Field radius: 0.959 degrees


    Resolution: 3410x2705

    Locations: Little Piney Observatory, Hagarville, Arkansas, United States

    Description

    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.--from NASA APOD 4/23/2009

    Shot over the nights of 2/4, 2/6, 2/9, 2/10, and 2/12. Its low in my southern sky so could only get a few hours each night. I did get five SII subs but there was very little there and it did not add enough to the image, so I abandoned that idea. Binned 2X2 and drizzled in PI.

    Comments

    Author

    rflinn68
    rflinn68
    License: None (All rights reserved)
    220538
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    Revisions

      Sh2-308, 



    
        

            rflinn68
      Original
    • Final
      Sh2-308, 



    
        

            rflinn68
      B

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    Sh2-308, 



    
        

            rflinn68