SOCO IMAGE GALLERY


 

NGC 1647 

NGC 1647 is a large open cluster in the constellation Taurus, located between the horns of the Bull about 4 degrees above the Hyades. Visually, it has a diameter of around 40 arc-minutes and a magnitude of 6.4. It is a fairly rich cluster with around 200 member stars, and is easily visible in my 10 X 50 binoculars. Physically, it is located at around 1700 LY from us. The two bright orange-ish stars above the cluster, HD30197 and HD30179, are foreground objects, located at 290 and 836 LY from us, repectively. Likewise, the two orange-ish stars along the lower right edge of the cluster, HD30233 and TYC1275-1666-1, are also not physically associated with the cluster.
The brightest star in the upper right corner of the image, HD30455, is a sun-like (G2V) star that I've observed on several occasions for calculating atmospheric extinction coefficients and color-correction weight factors. Since this color composite image was created using Exoatmospheric G2V Correction, this star exhibits the pale yellow-white color that is appropriate for a G2V star. It is around 97 LY away from us.

Date(s) Acquired: 28 March 2015
Telescope: Orion 120mm EON Apochromatic Refractor
Camera: QSI Model 583 with Optec NextGEN Ultra Widefield 0.7X Telecompressor

 

   Exposure Time (min) 
   Number of Exposures
   RGB
   1.5
   Hα
   -
   Hβ
   -
   OIII
   -
   RGB
   10
   Hα
   0
   Hβ
   0
   OIII
   0

 

Processing:
Master red, green, and blue images created using SIAM.
Color composite image created using Basic Processing Procedure III.
Color composite image contrast-stretched using Adobe Photoshop.




 

 

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