Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1795  ·  LBN 645  ·  LBN 646  ·  LBN 647  ·  LBN 650  ·  LDN 1359  ·  NGC 896
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IC1795 - A Fish Swimming Among the Stars, 



    
        

            Ethan Chappel
Powered byPixInsight
Getting plate-solving status, please wait...
IC1795 - A Fish Swimming Among the Stars, 



    
        

            Ethan Chappel
Powered byPixInsight

Acquisition details

Dates:
Nov. 6, 2021 ·  Nov. 7, 2021
Frames:
Astrodon 36mm Unmounted Gen2 E-Series Green: 91×90(2h 16′ 30″) (gain: 56.00) -5°C bin 1×1
Astrodon Gen2 E-Series Tru-Balance Blue: 94×90(2h 21′) (gain: 56.00) -5°C bin 1×1
Astrodon Gen2 E-Series Tru-Balance Lum: 154×60(2h 34′) (gain: 56.00) -5°C bin 1×1
Astrodon Gen2 E-Series Tru-Balance Red: 100×90(2h 30′) (gain: 56.00) -5°C bin 1×1
Integration:
9h 41′ 30″
Flats:
30
Bias:
50
Avg. Moon age:
2.43 days
Avg. Moon phase:
6.88%
Bortle Dark-Sky Scale:
2.00
Mean SQM:
21.55
Temperature:
10.03

RA center: 02h26m50s.535

DEC center: +62°0228.23

Pixel scale: 0.531 arcsec/pixel

Orientation: 55.365 degrees

Field radius: 0.511 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 5736x3875

File size: 110.6 MB

Data source: Traveller

Description

I am proud to present the first image from my new deep sky setup. It all started in February 2021, when I tested imaging with my EdgeHD 8 at F/7 with my SXVR-H674C. I saw potential with that combination, but the FOV was small & mounting it on the Advanced VX proved challenging.

Shortly after, I pre-ordered the QHY268M to widen the field of view, followed by Astrodon 36mm LRGB & Hydrogen Alpha filters, CFW3 filter wheel, OAG-M, & various extension tubes to reach the 105mm backfous distance required by the reducer. In June, my new EQ6-R Pro arrived. After some tweaking, I got guiding around mid-0.4" RMS in PHD2.

The hardest challenge has been getting the backfocus distance correct. It should be 105mm, but mine turned out to be farther. Still, I am wondering if it fully corrects the FOV of APS-C sensors since there is still some elongation at the edges.

I have been capturing data in my suburban backyard for a month now, but had a chance to gather LRGB data under dark skies at the Eldorado Star Party. Although I plan to use this setup mostly for galaxies & planetary nebulas, I chose the Fish Nebula since it was up all night.

Most nights were cloudy, but I captured data Friday & Saturday night to make an image with the help of PixInsight processing icons from a previous image. I am satisfied with the result, but there are a few issues to work out. Backfocus still appears off, bright stars have a larger glow than I expected, and there appears to be some chromatic aberration that possibly comes from the reducer. Hopefully these can be ironed out as I continue to work on this setup.

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Sky plot

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IC1795 - A Fish Swimming Among the Stars, 



    
        

            Ethan Chappel