DoDz 9 (Lund 812) Open Cluster in Hercules
Located at: RA 18 hours 08 minutes 48 seconds, Dec +31 degrees 32 minutes 00 seconds
Size: 34'*; Magnitude: --; Class: III 2 p
North is up
West to the right
| Telescope: |
8" f5 Newtonian reflector |
| Camera: |
ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56 |
| Image: |
Lumicon Red filter, 230 minutes (23 x 10 minute subs) 06/19/2010; seeing 1.7-2.5 FWHM per CCDStack |
| Processing: |
CCDStack 2.6.3800.24688, Photoshop 7.0 |
| Location: |
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s) |
| Notes:* | This cluster's listed size (in Megastar v 5.0.12) is larger than my imaging area (about 31' x 46'), but I wanted to include it in this roundup of open cluster in Hercules that I am imaging while to Moon is bright. In "Star Clusters", by Brent Archinal and Steven Hynes, the size is given at 28.0', which would fit within my field of view. This is classified as a true cluster, but looks like scattered field stars in this image |