Hemisphere:  Northern  ·  Constellation: Triangulum (Tri)  ·  Contains:  IC 131  ·  IC 132  ·  IC 133  ·  IC 135  ·  IC 136  ·  IC 137  ·  IC 142  ·  IC 143  ·  M 33  ·  NGC 588  ·  NGC 592  ·  NGC 595  ·  NGC 598  ·  NGC 604  ·  Triangulum galaxy
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M33, Triangulum Pinwheel Galaxy, 19 Sep 2014, 



    
        

            David Dearden
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M33, Triangulum Pinwheel Galaxy, 19 Sep 2014

Acquisition details

Dates:
Sept. 19, 2014
Frames:
74×300(6h 10′)
Integration:
6h 10′
Avg. Moon age:
25.24 days
Avg. Moon phase:
19.43%

RA center: 01h33m56s.27

DEC center: +30°3902.9

Pixel scale: 4.229 arcsec/pixel

Orientation: -88.525 degrees

Field radius: 0.467 degrees

More info:Open 

Resolution: 620x498

File size: 220.2 KB

Locations: Mapleton Lateral Observatory, Mapleton, Utah, United States

Description

Conditions don't get any better than this: clear, no wind to speak of, and comfortably cool. Dec guiding excellent, RA pretty good. Chiller at 2.5 A, 14.5 °C (I don't think it is working very well). Still imaging with Neb 3 (Mac) and controlling everything else with Windows versions. Initial synch was on α Trianguli. Set an alarm and got up at 3:15 AM to do meridian flip. Found the focus was a little soft and fixed it. Went back to bed and let the scope continue imaging until dawn.

Date: 19 Sep 2014

Subject: M33, Triangulum Pinwheel Galaxy

Scope: AT8IN+Antares 0.5x focal reducer

Filter: Baader Fringe Killer

Mount: CG-5 (Synta motors, PicGoto Simplificado)

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.3.1 (Win 7 ASCOM)

Camera: DSI IIc chiller at 2.50 A, 15-10 °C

Acquisition: Nebulosity 3.2.1, no dither

Exposure: 74x300 s

Stacking: Neb 3, bad pixel map, bias included, no flats, normalize first, trans+rot align, 1.5 SD stack.

Processing: StarTools 1.3.5.289 Crop; Wipe:Color & brightness 80%; Develop 74.99%; HDRptimize; Color:Scientific, 500%; Life:Moderate; Deconvolute 2.7 pix; Track: 1.7 pix, RNC 13.97%. Photoshop CC 2014 Astronomy Tools Increase star color; Deep space noise reduction; Smudge tool to fix some badly oblong stars; Astro Frame.

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M33, Triangulum Pinwheel Galaxy, 19 Sep 2014, 



    
        

            David Dearden