Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  NGC 4627  ·  NGC 4631  ·  NGC 4656  ·  NGC 4657  ·  Whale Galaxy
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NGC 4631, 4656; Whale and Crowbar Galaxies, David Dearden
NGC 4631, 4656; Whale and Crowbar Galaxies
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NGC 4631, 4656; Whale and Crowbar Galaxies

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Description

This is the first time I've tried imaging with the ST80 without a focal reducer.

Date: 10 May 2012

Subject: NGC 4631, 4656; Whale and Crowbar Galaxies

Scope: Orion ST80

Filter: Baader Fringe Killer

Mount: CG-5 (Synta motors)

Guiding: Meade 4501 + 0.5x Antares telereducer + DSI Ic + PHD

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

Acquisition: Nebulosity 3.0.3

Exposure: 15 x 300 s

Stacking: Neb 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 space & deep space noise reduction, star color enhance

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NGC 4631, 4656; Whale and Crowbar Galaxies, David Dearden