Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1805
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ZWO 1600MM Image Test: The Heart Nebula, 



    
        

            Alex Roberts
ZWO 1600MM Image Test: The Heart Nebula
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ZWO 1600MM Image Test: The Heart Nebula

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ZWO 1600MM Image Test: The Heart Nebula, 



    
        

            Alex Roberts
ZWO 1600MM Image Test: The Heart Nebula
Powered byPixInsight

ZWO 1600MM Image Test: The Heart Nebula

Technical card

Imaging telescopes or lenses: Explore Scientific ED127 FCD 100 Air-Spaced Triplet Apochromatic Refractor

Imaging cameras: ZWO ASI1600MM Pro

Mounts: Orion Atlas AZ/EQ Pro

Guiding cameras: Orion Starshoot Autoguider Pro

Focal reducers: Explore Scientific 0.75 Reducer/Flattener

Software: DeepSkyStacker  ·  Lightroom  ·  SharpCap  ·  Pixinsight Core version 1.8  ·  PHD2.6.3dev7

Filters: Baader H-Alpha 36mm 7nm  ·  Baader UV-IR-CUT Filter  ·  Baader O III 36mm 8nm

Accessory: ZWO EFW 36 mm Filter Wheel  ·  QHYCCD Polemaster  ·  Orion Telescopes Thin Off Axis Guider


Dates:Nov. 12, 2018Nov. 13, 2018

Frames:
Baader H-Alpha 36mm 7nm: 24x600" (4h) (gain: 139.00) -20C bin 1x1
Baader O III 36mm 8nm: 25x600" (4h 10') (gain: 139.00) -20C bin 1x1
Baader SII 36mm 8nm: 29x600" (4h 50') (gain: 139.00) -20C bin 1x1

Integration: 13h

Darks: 27

Flats: 50

Bias: 100

Avg. Moon age: 5.06 days

Avg. Moon phase: 26.40%

Bortle Dark-Sky Scale: 4.00

Temperature: -2.00


Basic astrometry details

Astrometry.net job: 2368319

RA center: 02h33m24s.2

DEC center: +61°2450

Pixel scale: 1.167 arcsec/pixel

Orientation: 23.654 degrees

Field radius: 0.822 degrees


Resolution: 1824x1235

Locations: Dewey AZ Home, Dewey, Arizona, United States

Data source: Backyard

Description

Wanting to capture a wider swath of sky than my QHY183M can manage, I recently purchased the ever-popular ZWO ASI1600MM Pro astro-cam. This is my first image fully processed image with this camera. So far, I am pleased with this camera's low noise and dynamic range. I am looking forward to capturing some winter targets with it in the coming weeks.

I am still a bit confused about the optimal exposure lengths for my 666mm f5.2 scope and sky conditions, however. Some are using 3 min subs while others are taking 20 minute subs. I started with 10 minutes but I probably could go shorter. I would appreciate feedback from anyone on the optimal settings for this camera. In other words, what is best exposure to provide enough exposure without oversaturating the brighter stars?

Strangely, my histogram indicates I am underexposing, even at 600 seconds. On the other hand, the stretched image appears to be OK or even slightly overexposed? Weird.

Thanks in advance.

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            Alex Roberts
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Histogram

ZWO 1600MM Image Test: The Heart Nebula, 



    
        

            Alex Roberts