CLICK ON IMAGE FOR FULL SIZE VIEW
Scope: C8 f/8;
Location: Dos Picos Park, Ramona, CA; 15 March, 2007; Camera:
Artemis285
Exposure: 8 x 330 sec Luminance exposures with IR Block Filter (bin 1x1);
6 x 120 sec RGB (bin 2x2)
Processing: Images were captured in Artemis Capture (as FITs). Aligned/stacked
in Registax 4 and saved as FITS. Luminance and Color channels were numerically
scaled and color balanced in Astroart. Channels were co-registered
in Astroart. Luminance and RGB exposures had central gradient removed in Astroart. Curves and Levels applied in Photoshop to optimize object
features. Luminance construction had background noise reduction applied (PixInsight
SGBNR). Selective sharpening was performed on the spiral arms. Final LRGB combine was done in Photoshop using Luminance
Layering (or LLRGB). G2V color calibration
factors were applied to
the color channels for color correction. Final Color balancing (to my eye)
and final
touches were done in Photoshop. Final Image size is approximately 1380x1030.
North is up in this image. NGC 3184 is a dim spiral galaxy located in the
constellation of Ursa Major. There are star forming regions in this galaxy
usually indicated by pinkish blotches. However, the color data in this image was
of insufficient signal to pick them up readily. The reddish glow in the
upper right comes from a deep red M2III class star (SAO43270) just outside
the image frame. The
distance of NGC 3184 to Earth is approximately 40 million light years. Horizontal FOV is about 20'
Image Center approximately - Equatorial 2000: RA: 10h 18m 17s Dec: +41°25'24"