- Exposure: LRGB - 18x300s:12x300s:12x300s:12x300s
- Luminance binned 1x1, RGB binned 2x2
- Telescope: Stellarvue SV152
- Mount: MI-250 GoTo
- Camera: SBIG ST-10XME CCD, SBIG CFW-10, AstroDon E-Series TruBalance Filters
- Location: Casa Cielo Observatory, Santa Barbara, CA
- Date/Time:
- Luminance: February 24, 2006, 03:15-05:02 PST
- RBG: May 30/31, 2006, 22:28-01:59 PDT
- Processing: Taken in MaxIm DL v4 using CCD Commander. Reduced in CCDSoft. Aligned sub-frames with RegiStar. Combined sub-exposures with Ray Gralak's Sigma Clip. Gradient Removal, RGB Color Combine, and DDP in MaxIm. 2 iterations of deconvolution in CCDSharp to luminance. LRGB combine, levels, saturation boost, and selective sharpening/blurring in Photoshop.
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- Names: M51/NGC5194, The Whirlpool Galaxy, NGC5195 (companion)
- Other Objects: IC4277, IC4278, IC4282
- Type: Spiral Galaxy, plus many
background galaxies
- Constellation: Canes Venatici
- Distance: about 15
million light years
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