Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  12 Cas  ·  LBN 592  ·  LBN 593  ·  LDN 1282  ·  LDN 1283  ·  NGC 103  ·  Sh2-173  ·  The star 12Cas
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Sh2-173 Phantom of the Opera Mask, Mike S
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Sh2-173 Phantom of the Opera Mask

Getting plate-solving status, please wait...
Sh2-173 Phantom of the Opera Mask, Mike S
Powered byPixInsight

Sh2-173 Phantom of the Opera Mask

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Acquisition details

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Description

Sh2-173 is an emission nebula in the constellation of Cassiopeia. This region has a diameter of 77 light years and is located at a distance of about 8800 light years. Sh2-173 is also nicknamed “Phantom of the Opera”

I imaged this back in mid-September from Wildcat Mountain in WI, bortle 2-3 skies. Total imaging time is just under 8 hours (5 hours Ha, 3 hours RGB).

I used PI for most of the processing, but started using Photoshop for some the final non-linear processing then back to PI to apply UnsharpMask, DarkStructureEnhance, and a final noise reduction pass with MMT.

Acquisition details:

Ha - 59 @ 300s

RGB - 60 each @ 60s

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Sh2-173 Phantom of the Opera Mask, Mike S