Search
Latest news
December: Test shots with new scopes/mounts
Dec 21: TMB 80/480 Arrives!
Dec 3: AP1200 Arrives!
Nov 30: TMB 152/1200 Arrives!
Links:
M3 (Globaluar Cluster)
| |
| Mouse-over to see annotations. (Requires Javascript) Click to see high-res version. |
Image Details:
- Camera: SBIG ST-2000XM
- Mount: Astro-Physics 1200GTO
- Scope: TMB 152/1200 APO Refractor
- Configuration: Prime Focus
- Additional Optics: n/a (Prime)
- Filter: Astrodon LRGB I-Series Filters
- Effective Focal Length: 1200mm
- Effective Focal Ratio: f/7.9
- Exposure: {9L, 8R, 8G, 8B} × 4min @ -20°C
- Total Exposure: 2hrs, 12min
-
- Date: 6/01/2008 11:00:48 PM PDT
- Location: Saratoga, CA, USA
- Acquisition: CCD Commander
- Focus: FocusMax
- Dithering: CCD Commander
- Guiding: Self Guided
Processing:
- IRIS: Registration, gradient removal
- JimP: Dark subtraction, Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
- CCDSharp: Deconvolution
- Photoshop: JPG conversion
Image Description:
This is M3, a Globular Cluster in the constellation of Canes Venatici. The seeing was absolutely horrible the night this was shot, so I used CCDSharp to deconvolve it. Seems to have worked reasonably well, without producing too many artifacts. A higher-resolution image is also available. North is up.