| Classification: |
Globular cluster M22, NGC6656 |
| Constellation: |
Sagittarius (SGR) |
| Object Location: |
Ra 18h 37m 32s Dec -23° 51’56” (current) |
| Size & Distance: |
32.0 x 32.0 Apx 10,600 light years. |
|
| Date & Location: |
07-02-2016 Palomar Mountain, CA. |
| Exposure: |
RGB 20, 20, 20, 6 ea. @ 200sec. (bin 1x1) |
| Optics: |
Telescope Engineering Company APO180FL @ f/7.36 using an Astro-Physics 160FF, F/L 1325mm |
| Mount: |
Astro-Physics 1200 GTO / ATS 10x36 pier. |
| Camera: |
FLI-MLx694 @-20c / FLI CFW2-7 / FLI-Atlas focuser / Guided by SBIG ST-I / w OAG. |
| Filters: |
Astrodon G2 RGB |
| Software: |
MaxImDL 6.10, Photoshop CS5, CCDStack, Topaz Labs- clarity. |
|
| Notes: |
Sky conditions: Above average seeing, calm wind, Temp 68°
Image Field of view is 26 x 32.4 arcmin.
Note: No darks, flats, bias, were used in processing.
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M22 is an elliptical globular cluster in the constellation Sagittarius, near the Galactic bulge region. It is one of the brightest globulars that is visible in the night sky. M22 is also one of the nearer globular clusters to Earth at a distance of about 10,600 light-years away. It spans 32' on the sky which translates to a spatial diameter of 99 ± 9 light-years. 32 variable stars have been recorded in M22. (Wikipedia)
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