Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5457
Messier 101 The Pinwheel Galaxy, BUastronomer
Messier 101 The Pinwheel Galaxy
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Messier 101 The Pinwheel Galaxy

Messier 101 The Pinwheel Galaxy, BUastronomer
Messier 101 The Pinwheel Galaxy
Powered byPixInsight

Messier 101 The Pinwheel Galaxy

Equipment

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Acquisition details

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Description

Telescope: 10'' aperture dobsonian reflector, 1200 mm focal length, and f/4.7 focal ratio.

Camera: Atik Infinity Color CCD Sony ICX825 1392x1040

Processing: Photoshop CS4

Levels blackpoint adjustment.

Gradient Xterminator Plugin (medium and low settings, then fine and high settings with galaxy mask).

Levels whitepoint adjustment.

Blue levels adjustment with star and galaxy mask.

Levels blackpoint adjustment 2 with galaxy/stars mask.

Photoshop CS4 Noise reduction with 8 aggressiveness, 35% detail preservation, and 100% color noise reduction.

Galaxy dustlane contrast and brightness adjustment.

Galaxy brightness and contrast adjustment.

Curve anchored at (input,output): 10,10; 15,15; 20,20; 25,25; 30,30; 161,167

Color balance for shadows, midtones, and highlights

Selective color for galaxy nebulosity

Galaxy saturation increase with star and black areas mask.

Gimp 2.8 Cropping and hotpixel removal.

Location: Clifton Texas Paul and Jane Meyer Observatory

Comments

Sky plot

Sky plot

Histogram

Messier 101 The Pinwheel Galaxy, BUastronomer