Hemisphere:  Southern  ·  Constellation: Aquarius (Aqr)  ·  Contains:  Helix nebula  ·  NGC 7293  ·  NGC7293  ·  PK036-57.1
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NGC 7293, Helix Nebula, 13 Sep 2012, 



    
        

            David Dearden
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NGC 7293, Helix Nebula, 13 Sep 2012

Imaging telescopes or lenses: Astro-Tech AT8IN

Imaging cameras: Meade DSI II C

Mounts: CG5

Guiding telescopes or lenses: Orion ShortTube 80 f/5

Guiding cameras: Meade DSI

Focal reducers: High Point Scientific Coma Corrector Photo & Visual For Netwonian Telescopes 2"

Software: PHD guiding  ·  photoshop  ·  Noel Carboni's Astro Tools for PhotoShop  ·  AstroPlanner  ·  Stellarium  ·  Nebulosity

Accessory: HB Home-built TEC1-12706 cooler  ·  Orion AccuFocus


Dates:Sept. 13, 2012

Frames: 42x300" (3h 30')

Integration: 3h 30'

Avg. Moon age: 26.80 days

Avg. Moon phase: 8.20%


Astrometry.net job: 158198

RA center: 22h 29' 34"

DEC center: -20° 49' 43"

Pixel scale: 1.865 arcsec/pixel

Orientation: -176.601 degrees

Field radius: 0.250 degrees


Resolution: 733x628

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

Description

Found visually on the first try. Some gusty wind tonight. CCD starts at 9 °C. High dither settling at 0.4. CCD ends around 0 °C. The last dozen frames were with the scope pointed below the horizon, so I'm using them as matched darks. The image turned out very nice; the best I've yet done with the Helix Nebula.

Date: 13 Sep 2012
Subject: NGC 7293, Helix Nebula
Scope: AT8IN+High Point Scientific Coma Corrector
Filter: None
Mount: CG-5 (Synta motors)
Guiding: Orion ST80 + 0.5x Antares telereducer + DSI Ic + PHD
Camera: DSI IIc (cooled at 2 A, 7.5 V, 9 to 0 °C)
Acquisition: Nebulosity 3.1.1
Exposure: 42 x 300 s
Stacking: Neb 3, bias included, normalize first, trans+rot align, 1.5 SD stack
Processing: Digital development with aggressive sharpening, heavy Keller stretch, power stretch, saturation boost, GreyCStoration in Neb 3; CS6 Astronomy Tools star color enhance, color blotch, deep space, space noise reduction, color range select background greys and desaturate them.

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NGC 7293, Helix Nebula, 13 Sep 2012, 



    
        

            David Dearden