Celestial hemisphere:  Northern  ·  Constellation: Cancer (Cnc)  ·  Contains:  HD75767  ·  HD75880  ·  HD76037  ·  HD76629  ·  IC 523  ·  PK219+31.1  ·  Sh2-290
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Sh2-290 HORGB with OIII / Ha in the Luminance channel for Detail enhancement, Alex Woronow
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Sh2-290 HORGB with OIII / Ha in the Luminance channel for Detail enhancement

Getting plate-solving status, please wait...
Sh2-290 HORGB with OIII / Ha in the Luminance channel for Detail enhancement, Alex Woronow
Powered byPixInsight

Sh2-290 HORGB with OIII / Ha in the Luminance channel for Detail enhancement

Equipment

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Acquisition details

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Description

OTA: RH-305 (12” f/3.5)
Camera: SBIG STX-16803
Observatory: Deep Sky West (data from 2018)

EXPOSURES:
R: 24 x 300 seconds
G: 12 x 300
B: 12 x 300
H: 30 x 1200
O: 26 x 1200
Total exposure 22.7 hours

Processed by Alex Woronow (2022) using PixInsight, Topaz, NB-Assistant

Sitting in a folder labeled, “Trash or Treasure?” for about 6 months, I finally decided to make one more pass at getting something worth sharing. The subs were unbelievably noisy, and the image contrast was minimal making the image a colorful smudge. I had actually reopened the image just for the chance to test Topaz’s new all-in-one photo-processing software. I fed it that low-grade image. Without touching a control, it did reasonable denoising and enhancing…not a ready-for-primetime, but encouraging enough for me to export the result and continue the processing in Studio2 and PI.

As you probably immediately deduced, Sh2-290 is a planetary nebula. It is fairly close to us, maybe 2,000 lyrs, and the largest planetary nebula in our sky. Unfortunately, it is a rather faint target and hard to capture and process for details.

Image show at 2x downsampled from original.

Alex Woronow

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Sh2-290 HORGB with OIII / Ha in the Luminance channel for Detail enhancement, Alex Woronow