| Classification: |
Dark Nebula / IC4603-4-5-6 / vdB107 / M4 / Sh2-9 |
| Constellation: |
Ophiuchus (OPH) & Scorpius (SCO) |
| Object Location: |
Ra 16h m 24s Dec -25° 26’ |
| Size & Distance: |
4.5° x 6.5° Apx 500 light years |
|
| Date & Location: |
05-22-2012 Little Blair Valley, CA |
| Exposure: |
LRGB L= 2 @ 5 min, RGB= 3 ea. @ 5 min. All (bin 2x2) |
| Optics: |
Nikon 180ed lens open to f/4 |
| Mount: |
Astro-Physics 900 GTO / ATS 10x36 pier. |
| Camera: |
SBIG-STL6303E @-20c Guided by TV60 / SBIG-RGH |
| Filters: |
Astrodon G2 LRGB |
| Software: |
MaxImDL 4.56, Photoshop CS5 |
|
| Notes: |
Sky conditions: Good seeing, Light wind, Temp 60°
Image Field of view is apx 5.8° x 8.7°
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The Rho Ophiuchi cloud complex is a dark nebula of gas and dust that is located 1° south of the star ρ Ophiuchi of the constellation Ophiuchus. This cloud is one of the closest star-forming regions to the Solar System.
The cloud covers an angular area of 4.5° × 6.5° on the celestial sphere. It consists of two major regions of dense gas and dust. Some of the structures within the complex appear to be the result of a shock front passing through the clouds from the direction of the neighboring Sco OB2 association.
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