ngc 4725 - 9 hours unguided 2020 (Stefano Ciapetti)

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: NGC 4712 · NGC 4725

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ngc 4725 - 9 hours unguided 2020

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ngc 4725 - 9 hours unguided 2020

This image is the combination of 3 nights exposures between April and May 2020, for a total of almost 9 hours exposures.

Imaging train was:

Orion 250 F 3.9 telescope

Ioptron CEM60EC mount

QHY183m cooled camera

This is not the finished image. There are some other processing steps to be done. However I was surprise of the result. So much signal. Everytime I am impressed of the combo QHY183 + Orion 250 f 3.9.

NGC 4725 is an intermediate barred spiral galaxy with a prominent ring structure about 40 million light-years away in the constellation Coma Berenices. NGC 4725 is a Seyfert Galaxy, suggesting an active galactic nucleus containing a supermassive black hole.

NGC 4725 is the brightest member of the Coma I Group. (Wikipedia)

Original
B
C
Final
D

B

Description: Version 2 - levels, curves, star reduction and star elongation correction. All in PS. Thanks for looking

Uploaded: ...

C

Description: playing with Gimp and old images - unsharp mask on galaxy / curves / selective gaussian blur on the background

Uploaded: ...

D

Description: Trying to improve using Astroart deconvulsion for star rounding and PS for cosmetic. But I don't like this image. It was taken in very windy or humid nigths and raw images are very bad.

Uploaded: ...

ZWO ASI183/QHY183
Suburban Astrophotography
Imagers of Italy
Short exposures DSO
Fast Newtonians

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Status	Advanced success
Started	...
Astrometry.net job	3555279
PixInsight job	D6KC5ZDEHQ8TLT8BH3GUR88LPONF04HD
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h50m22s.701
RA (top/left)	12h50m54s.342
RA (top/right)	12h49m04s.303
RA (bottom/right)	12h49m51s.203
RA (bottom/left)	12h51m41s.630

Dec (center)	+25°30′42″.23
Dec (top/left)	+25°47′02″.93
Dec (top/right)	+25°33′17″.35
Dec (bottom/right)	+25°14′14″.76
Dec (bottom/left)	+25°27′58″.42

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ngc 4725 - 9 hours unguided 2020

ngc 4725 - 9 hours unguided 2020

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ngc 4725 - 9 hours unguided 2020

ngc 4725 - 9 hours unguided 2020

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