Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5447  ·  NGC 5449  ·  NGC 5450  ·  NGC 5451  ·  NGC 5453  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5462  ·  NGC 5471  ·  Pinwheel galaxy
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M 101, Pinwheel Galaxy, David Dearden
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M 101, Pinwheel Galaxy

Equipment

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Description

Date: 28 May 2012

Subject: M101, Pinwheel Galaxy

Scope: Meade 4501+ 0.5x Antares telereducer

Filter: none

Mount: CG-5 (Synta motors)

Guiding: Orion ST80 + 0.5x Antares telereducer + DSI Ic + PHD

Camera: DSI IIc (cooled at 2 A, 6.0 V)

Acquisition: Nebulosity 3.0.3

Exposure: 40 x 300 s

Stacking: Neb 3.0.3, bias included, normalize first, trans+rot align, 1.5 SD stack

Processing: Digital development with sharpening, power stretch, Keller stretch, a little saturation boost, GREYCStoration in N3, CS5 levels, Astronomy Tools color blotch reduction, star color enhance; CS5 unsharp mask, healing brush

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    M 101, Pinwheel Galaxy, David Dearden
    Original
  • M 101, Pinwheel Galaxy, David Dearden
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M 101, Pinwheel Galaxy, David Dearden