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Astrophotography by Jason Jennings

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Nebulae :: NGC6164-6165


NGC6164-6165

 

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         Object NGC6164-6165 - Bi-polar Nebula
         Comment Located in the constellation Norma, the S-shaped bi-polar emission nebula (NGC6164-6165) forms part of the greater Ara OB1 region. Originally believed to be a planetary nebula, NGC6164-6165 is the result of ejected matter from the poles of the central O-type star (HD 148937) as it passes the main sequence life cycle. Due to the star's fast rotation, magnetic field and violent winds, the gas is being expelled in a symmetric manner. While the nebulosity appears connected, the object has been granted two NGC catalogue numbers. In the image presented, NGC6164 is located at the bottom, while NGC6165 at the top. The nebula is estimated as being 4,000 light years away. To the right of the central blue star in the image (SOA 226920) is the small open cluster designated SAC Ru 120.

This image is a R[Ha+R]GB composite.
         Optics RCOS 12.5" F/9.15 (2846mm FL)
         Camera SBIG STL-11000M - 1x1 bin (image scale .65 arcsec/pix)
         Mount Paramount ME
         Exposure Total exposure time: 5.5 hours (R:120min,Ha:75min,R:45min,G:45min,B:45min)
         Date Acquired over two nights.
15/04/2008
17/04/2008

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