PHD2 Guide ratio

[GazAstro]

Hi all, going to start trying galaxies with my C8 ... only really manged guiding successfully at 350mm before so should be interesting !

Equipment - HEQ5 (belt modded) C8 edge / 0.7 reducer OVL OAG.

From the excellent astronomy tools site my ratio is 1:1.53 as I will be binning the guide cam to help find guide stars.

 

My question is, I know I have little or no chance of round stars at 0.55"/pixel so do you think I will have more success binning imaging camera or by resampling images after capture ?

Best guiding I have reached is approx 0.8 p to p and my local seeing is usually pretty poor, in the 2 - 4 arc secs range (forecast for tonight is 1.2 though - and pigs may fly past scope while imaging  🙂 )

Thanks for looking.

[AstronomyUkraine]

5 hours ago, GazAstro said:

Hi all, going to start trying galaxies with my C8 ... only really manged guiding successfully at 350mm before so should be interesting !

Equipment - HEQ5 (belt modded) C8 edge / 0.7 reducer OVL OAG.

From the excellent astronomy tools site my ratio is 1:1.53 as I will be binning the guide cam to help find guide stars.

 

My question is, I know I have little or no chance of round stars at 0.55"/pixel so do you think I will have more success binning imaging camera or by resampling images after capture ?

Best guiding I have reached is approx 0.8 p to p and my local seeing is usually pretty poor, in the 2 - 4 arc secs range (forecast for tonight is 1.2 though - and pigs may fly past scope while imaging  🙂 )

Thanks for looking.

Binning 2x2 will bring your resolution to 1.1"/pixel, which would make guiding easier, and you could always drizzle the data, if you need to.

 

Brian

 

Brian

Edited March 30, 2021 by AstronomyUkraine