Celestial hemisphere:  Northern  ·  Constellation: Lyra (Lyr)  ·  Contains:  IC 1296  ·  M 57  ·  NGC 6720  ·  Ring Nebula
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M57, The Ring Nebula, UHC-S, David Dearden
M57, The Ring Nebula, UHC-S
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M57, The Ring Nebula, UHC-S

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Description

This was the warm-up image tonight, and really should be done (and could have been done; the mount was behaving well) without the telereducer; I might even want to try a Barlow.

Date: 26 Jun 2012

Subject: M57, Ring Nebula

Scope: AT8IN + 0.5x Antares telereducer

Filter: Baader UHC-S

Mount: CG-5 (Synta motors)

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

Camera: DSI Ic

Acquisition: Nebulosity 3.0.6

Exposure: 39 x 300 s

Stacking: Neb 3, bias included, auto quality screen normalize first, trans+rot align, 1.5 SD stack

Processing: auto color balance, digital development with sharpening, power stretch, saturation boost, unsharp mask in N3, CS5 levels, Astronomy Tools deep space noise reduction, star color enhance

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M57, The Ring Nebula, UHC-S, David Dearden