Astronomy and astrophotography under California stars


Globular Star Cluster in Hercules
M13, a globular star cluster in Hercules. Taken with a Takahashi TOA-150 telescope and an FLI ML11002-C camera.
Other Names/Objects
Optics Takahashi TOA-150 f/7.33 triplet apochromatic refractor
Mount Software Bisque Paramount ME II
Camera FLI MicroLine KAI-11002-C at -25°C
Exposure 180 minutes (36 x 5 minutes)
Calibration 60 darks | 0 flats | 0 flat darks | 0 bias
Air Temperature 60°F / 15.5°C
Accessories Autoguided with SBIG ST-i camera and Takahashi FS-60 telescope
Location CaliforniaStars Observatory in Landers, California
Date April 22, 2017
Notes Below and to the left of the cluster is the 11th magnitude galaxy NGC 6207. Also to the cluster's lower left but closer to the cluster is the 15th magnitude galaxy IC4617. View the full size image to see lots of small, faint galaxies (several are in the upper left corner).

Processing: TheSkyX for acquisition. MaxIm DL Pro v6 for calibrate, Bayer CFA interpolation, register, and combine. Photoshop CC for curves, levels, sharpen, saturation, resize and JPG compression.

Larger Versions:
3600 x 2400 (~4.56 MB)