Lots of gusty winds on this warm night (CCD at 23 °C; I still haven't tried to repair my Peltier chiller) that started out beautifully clear. Because this object is not in any of the CdC catalogs I have, I had to just enter the coordinates from AstroPlanner into the PicGoto, and that worked just fine synching from Deneb. Wind gusts played havoc with this image. After I went to bed, the winds died down a little but we started to get some clouds, and I even got a rain alarm in the wee hours of the morning (but no rain actually came). I plan to follow later with Hα, which should greatly benefit this image. Drizzle stacking (2x) in Deep Sky Stacker significantly improved the results over what I was able to do without drizzle in Nebulosity 4, which left a lot of “holes” from hot pixel removals.
Date: 13 Jun 2015
Subject: DWB111, Propeller Nebula
Scope: Astrotech AT8IN+Antares 0.5x focal reducer
Filter: Baader Fringe Killer
Mount: CG-5 (Synta motors, PicGoto Simplificado)
Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.5.0 (Win 7 ASCOM)
Camera: DSI IIc no cooling (about 23 °C)
Acquisition: Nebulosity 4.0.2, no dither
Exposure: 33x300 s
Stacking: Neb 4.0.2, bad pixel map, bias included, 33 flats, histogram match, deBayer & square. DSS 2x drizzle, 1.5σ κ-σ stack.
Processing: StarTools 1.3.5.289 Crop; Wipe: 81%; Develop: 69.62%; HDR
ptimize; Color:Scientific 262%; Deconvolute 4.7 pix; Life:moderate; Track 6.1 pix, smoothness 80%; Magic, shrink 3 pix. Photoshop CC 2014 + Carboni Astronomy Tools Deep space nr; Curves; Increase star color 3 times (didn’t seem to do anything much); Astroframe.
Comments