Whirlpool Galaxy (M51) - 2023.05.13 (Vroobel)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: HD116475 · HD117815 · HD118019 · IC 4263 · IC 4277 · IC 4278 · M 51 · NGC 5169 · NGC 5173 · NGC 5194 · NGC 5195 · NGC 5198 · NGC 5229 · Whirlpool Galaxy

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Whirlpool Galaxy (M51) - 2023.05.13

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Whirlpool Galaxy (M51) - 2023.05.13

This image is a result of learning a few new components for me. Last month I bought a used Celestron CGX mount and ASI 2600MC-Pro camera and recently another new child appeared in the family: a new ASIair Plus controller. The last one is just to check whether my problems with guiding come from the mount side or from the PHD provided with the Astroberry system. I spent some money, but the result surprised me hugely: The ASIair Plus guided my mount with average total RMS = 0.75-0.80" (0.65 wasn't rare) while the PHD2 never dropped below 1.20", but mostly it was nearly 2.00". So my question is: why the same Raspberry Pi 4 with 8GB RAM (Astroberry) cannot guide the mount with the same result as the ASIair Plus??

I have to try it also with my ATM EQ mount, perhaps this mount can improve its behaviour as well? (The ASIair Plus works with OnStep)

As the CGX and the ASIair Plus satisfied me I have a plan to hang my Newtonian 10" F/5 on top of the mount and repeat the Whirlpool Galaxy ASAP.

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Status	Advanced success
Started	...
Astrometry.net job	7717060
PixInsight job	7IZPINNZO5IEOQIWTHBLAM92UNGE45KF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h29m52s.20
RA (top/left)	13h23m08s.34
RA (top/right)	13h36m39s.51
RA (bottom/right)	13h36m47s.28
RA (bottom/left)	13h22m52s.15

Dec (center)	+47°11′15″.4
Dec (top/left)	+46°23′23″.0
Dec (top/right)	+46°24′25″.8
Dec (bottom/right)	+47°57′41″.1
Dec (bottom/left)	+47°56′38″.4

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Whirlpool Galaxy (M51) - 2023.05.13

Whirlpool Galaxy (M51) - 2023.05.13

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Whirlpool Galaxy (M51) - 2023.05.13

Whirlpool Galaxy (M51) - 2023.05.13

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