M51 and NGC 5195 (Lee)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 4277 · IC 4278 · M 51 · NGC 5194 · NGC 5195 · Whirlpool Galaxy

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M51 and NGC 5195

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M51 and NGC 5195

Like last year, April seems to throw up more clear nights than normal. Astro darkness is only 4-5 hours right now so it's critical to make the most of it. This was captured over 4 nights with some fairly ruthless removal of subs where star shape or quality was poor.

A brighter target than NGC 3718 so I left my RC6 without a reducer at F9.

In the end 9.5 hours was captured with 285 x 120s subs.

Check out IC 4278 (just above NGC 5195) and IC 4277 (just above and to the right of NGC 5195). Very faint but clearly visible.

Resampled significantly as the resolution just isn't there at 0.57"PP so better to get higher SNR and resample.

I think I've processed this to within an inch of its life in an attempt to get more from it.

Captured with Voyager, calibrated & stacked in APP and processed in PixInsight

Original
B
C
Final
E

B

Description: Reprocessed from scratch.

Uploaded: ...

C

Description: Reprocessed again as part of a comparison to Revision E. No BlurXTerminator used.

Uploaded: ...

E

Description: Reprocessed with BlurXterminator used. NoiseXTerminator also made a positive difference to the very faint tails. This is a comparison to Revision C where I aimed to process the same but without BlurXTerminator there. Revision C and E are both resampled/binned in software from 0.57"PP to 1.14"PP

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	6860347
PixInsight job	3RA0ZHYE7NQQNLVLVXH45FBTEMDEFADG
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h29m51s.33
RA (top/left)	13h29m03s.58
RA (top/right)	13h29m16s.19
RA (bottom/right)	13h30m38s.80
RA (bottom/left)	13h30m26s.73

Dec (center)	+47°11′32″.5
Dec (top/left)	+47°21′52″.8
Dec (top/right)	+46°59′51″.6
Dec (bottom/right)	+47°01′11″.8
Dec (bottom/left)	+47°23′13″.9

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M51 and NGC 5195

M51 and NGC 5195

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M51 and NGC 5195

M51 and NGC 5195

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