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Scope: C8 f/8, Location: Del Mar, CA 17 April 2006 Camera: Artemis285
Exposure: 10 x 360 sec Luminance exposures with IR block, 7 x 120 sec (2x2 bin) RGB exposures.
Processing: Images were captured in Artemis Capture (as FITs). Aligned/stacked in Registax 3 and saved as FITS. Luminance and Color channels were numerically scaled and color balanced in Astroart. Channels were co-registered in Astroart. Curves and Levels applied in Photoshop to optimize object features. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB). Selective sharpening with layer mask was applied to galaxy dust lanes. Since the image was stretched with a high background value, some star repair was performed. Color balancing and final touches were done in Photoshop. SGBNR was used to smooth background noise on the luminance construction. Final Image size is approximately 1392x1040.
North is up in this image. The image was guided for all exposures. M90 is one of the members of the Virgo cluster and is located in the constellation of Virgo. It is about 60 million light years distant from Earth. A Magnitude 13.3 galaxy (IC3583) is visible at the upper edge of the field. A few smaller galaxies are also seen in this field as fuzzy dots. M90 is an interesting galaxy in that it is moving toward us at about 383 km/sec. Horizontal FOV is 20'
Image center is approximately - Equatorial 2000: RA: 12h 36m 50s Dec: +13°09'50"