Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1795  ·  IC 1805  ·  NGC 1027  ·  NGC 896
The Heart of Cassiopeia, 



    
        

            Casey Offord
The Heart of Cassiopeia
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The Heart of Cassiopeia

The Heart of Cassiopeia, 



    
        

            Casey Offord
The Heart of Cassiopeia
Powered byPixInsight

The Heart of Cassiopeia

Acquisition details

Dates:
Oct. 11, 2022 ·  Oct. 13, 2022 ·  Oct. 16, 2022
Frames:
ZWO H-alpha 7nm 36mm: 144×300(12h) (gain: 100.00) -10°C bin 1×1
ZWO O-III 7nm 36mm: 192×300(16h) (gain: 100.00) bin 1×1
ZWO S-II 7nm 36 mm: 144×300(12h) (gain: 100.00) -10°C bin 1×1
Integration:
40h
Avg. Moon age:
18.61 days
Avg. Moon phase:
81.53%
Bortle Dark-Sky Scale:
5.00

Basic astrometry details

Astrometry.net job: 6441631

RA center: 02h32m43s.2

DEC center: +61°2606

Pixel scale: 2.227 arcsec/pixel

Orientation: 274.159 degrees

Field radius: 2.201 degrees

Resolution: 6007x3815

File size: 10.1 MB

Locations: Maple Valley, WA, USA, Maple Valley, WA, United States

Data source: Backyard

Description

IC-1805, shot over 6 nights with varying degrees of wildfire smoke in the air.  I hadn't used my Z73 in a long while, and lately I've been trying to convince myself that doublets are almost as good as triplets when narrowband imaging, so I gave this target some extended time to find out.  In the end, the stars do look better with a triplet (at least my FLT91), but clever processing takes care of most of that. Stars in this image were taken from the Ha and OIII stacks and combined as HOO to bring out a bit more color than normal SHO would.  I'll probably add some RGB stars at some point.

Comments

Sky plot

Sky plot

Histogram

The Heart of Cassiopeia, 



    
        

            Casey Offord