Astronomy and astrophotography under California stars
Rho Ophiuchus Area
Emission & Reflection Nebulae with Star Clusters
Rho Ophiuchus area with surrounding nebulosity and star clusters. Click for a larger version.
Other Names/Objects Rho Ophiuchus Reflection Nebula, M4 Globular Star Cluster
Optics Canon EF 200mm f/2.8L II Lens at f/3.5
Mount Astro-Physics 900-GTO German Equatorial Go-To Mount
Camera Canon EOS 60Da DSLR
Exposure 70 minutes (14 x 5 minutes) at ISO 400
Calibration 15 darks | 20 flats | 0 bias
Air Temperature 45°F
Accessories Autoguided with Deep Sky Instruments RC10C and SBIG ST-i camera
Location CaliforniaStars Observatory in Landers, California
Date May 26, 2012
Notes Processing: Canon EOS Utility for framing and capturing. Calibrate, align and combine in ImagesPlus v4.75. Curves, saturation, sharpen, crop, resize, and JPG compression in Photoshop CS4.

Larger versions:
1800 x 2700 (~4.0 MB)