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Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Bubble Nebula  ·  LBN 548  ·  LBN 549  ·  LDN 1231  ·  M 52  ·  NGC 7635  ·  NGC 7654  ·  PK112-00.1  ·  Sh2-162
old hard disks exploration - m52 and ngc7635 of July 2018 - 72 180 unguided subs, Stefano Ciapetti
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old hard disks exploration - m52 and ngc7635 of July 2018 - 72 180 unguided subs

old hard disks exploration - m52 and ngc7635 of July 2018 - 72 180 unguided subs, Stefano Ciapetti
Powered byPixInsight

old hard disks exploration - m52 and ngc7635 of July 2018 - 72 180 unguided subs

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Description

This image is the sum of 72 180 secs unguided subs taken during the night of the 19 august 2018 with a Vixen ED114,  a modded Canon 450d on top of a Vixen gpdx. Stacking with DSS and processing with Astroart 8 (gradient removal, crop, deconvultion, DDP).
I have found this image in an old hard disk and I have decided to reprocess it using Astroart 8. Integration time is very short and image looks noisy for that reason and also because the 450d is a good, but outdated camera. Also temperature was very high as it was August. I think that sometime is nice to show not only the nice images but also the ones with defect.

Messier 52 or M52, also known as NGC 7654, is an open cluster of stars in the highly northern constellation of Cassiopeia. It was discovered by Charles Messier on 1774. It can be seen from Earth under a good night sky with binoculars. The brightness of the cluster is influenced by extinction, which is stronger in the southern half. Its metallicity is somewhat below that of the Sun, and is estimated to be [Fe/H] = −0.05 ± 0.01.(Wikipedia)

NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region[1] emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star, SAO 20575 (BD+60°2522). The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow. It was discovered in 1787 by William Herschel. The star BD+60°2522 is thought to have a mass of about 44 M. (Wikipedia)

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old hard disks exploration - m52 and ngc7635 of July 2018 - 72 180 unguided subs, Stefano Ciapetti

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