Found the Propeller the same way as before, just by centering Deneb and then doing a goto to the coordinates in AstroPlanner. Worked very well. Used the PHD2 2.5.01 Guiding Assistant for the first time. It pretty much told me my backlash was really bad (about 60 s!) and that I should do unidirectional DEC guiding, and gave me good values for min motion settings. I'm getting some of the best guiding performance ever. The forecast for tonight was not great, but weather was good early on. I should have listened to the forecast, because I battled clouds through the entire session and finally gave up when I went out to do a meridian flip; I brought my gear in and turned the sprinklers on. So I didn’t get enough Hα data, but here it is.
Date: 22 Jul 2015
Subject: DWB111, Propeller Nebula
Scope: Astrotech AT8IN+Antares 0.5x focal reducer
Filter: Baader 7 nm Hα
Mount: CG-5 (Synta motors, PicGoto Simplificado)
Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.5.0.1 (Win 7 ASCOM)
Camera: DSI IIc no cooling (about 24 °C)
Acquisition: Nebulosity 4.0.2, no dither
Exposure: 12x600 s
Stacking: Neb 4.0.2, bad pixel map, bias included, no flats, OSC extract R, normalize intensities, square, align. DSS 2x drizzle, 1.5σ median κ-σ stack. Resize to match (roughly) the RGB data.
Processing: StarTools 1.3.5.289 Crop; Wipe: 75%; Develop: 74.19%; HDR
ptimize; Deconvolute 4.0 pix; Track 6.0 pix, smoothness 90%; Magic, shrink 2 pix. Photoshop CC 2014 + Carboni Astronomy Tools Local contrast enhance; Astroframe.
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