m100 833 60 secs unguided subs during 10th and 11th of April 2022 (Stefano Ciapetti)

m100 833 60 secs unguided subs during 10th and 11th of April 2022

This image is the sum of 833 60 secs unguided subs taken during the nights of 10th and 11th of April. Imaging train was Newton 250 F 3.9, qhy268M camera, Primaluce Lab UHC filter, Ioptron CEM60 EC mount, Omegon Coma Corrector. Aquisition and processing with Astroart 8.

This is the first time I have used the Omegon Coma Corrector. As it was the first time I have not used it at correct distance. I have used at the "standard" 55 mm while it seems it needs 75 mm distance. Therefore I have cropped image to avoid "comet style" stars.

Moreover gradient was much better than the one coming from previous coma corrector, the sharpstar.

I have included the image coming from the C5 (used at F10) put on top of the Newton, combined with a modded Nikon d5600 + a CLS filter.

I have also included the color combination image.

Messier 100 (also known as NGC 4321) is a grand design intermediate spiral galaxy in the southern part of the mildly northern Coma Berenices. It is one of the brightest and largest galaxies in the Virgo Cluster and is approximately 55 million light-years from our galaxy, its diameter being 107,000 light years, and being about 60% as large. It was discovered by Pierre Méchain in 1781 and 29 days later seen again and entered by Charles Messier in his catalogue "of nebulae and star clusters". It was one of the first spiral galaxies to be discovered, and was listed as one of fourteen spiral nebulae by Lord William Parsons of Rosse in 1850. NGC 4323 and NGC 4328 are satellite galaxies of M100; the former is connected with it by a bridge of luminous matter. (Wikipedia)

Original
B
C
Final
D

B

Description: Image taken with the C5 at F10 + modded Nikon d5600 put on top of the Newton - 170 x 120 secs subs.

Uploaded: ...

C

Description: combination of the 2 images

Uploaded: ...

D

Description: Added this other old color image:

https://astrob.in/ftcptu/B/

Uploaded: ...

Suburban Astrophotography
Imagers of Italy
Short exposures DSO
Fast Newtonians

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Status	Advanced success
Started	...
Astrometry.net job	5683331
PixInsight job	KS59Q8V5391VQ72A1XCEBYVJYYU1TJE8
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h22m48s.300
RA (top/left)	12h21m06s.593
RA (top/right)	12h23m08s.719
RA (bottom/right)	12h24m29s.454
RA (bottom/left)	12h22m27s.458

Dec (center)	+15°49′33″.80
Dec (top/left)	+15°53′18″.48
Dec (top/right)	+16°13′45″.64
Dec (bottom/right)	+15°45′45″.98
Dec (bottom/left)	+15°25′22″.85

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