Mars....missed it

[yesteryeargames]

I was using a 7mm celestron lx eyepiece , maybe the street light and windy conditions didn't help, will try again this week.thanks

[chiltonstar]

Presumably the (otherwise excellent) Calsky simulation doesn't include atmospheric seeing??

If so, this would obviously degrade the view quite a bit, eg with 1 arcsec seeing (very much the UK quoted norm) a 10" scope behaves like a theoretical 4".

Is this so?

Chris

[darthvader]

Does calsky also assume best possible view with chosen scope ignoring what EP size you are using? Its a fantastic site though she'd loads of info!

[Laurie61]

Presumably the (otherwise excellent) Calsky simulation doesn't include atmospheric seeing??

If so, this would obviously degrade the view quite a bit, eg with 1 arcsec seeing (very much the UK quoted norm) a 10" scope behaves like a theoretical 4".

Is this so?

Chris

I have not seen the option on CalSky to allow for local seeing conditions so it must assume  perfect seeing. Non optimal seeing conditions will restrict the performance of a scope with bigger apertures being affected more.  

[Laurie61]

Does calsky also assume best possible view with chosen scope ignoring what EP size you are using? Its a fantastic site though she'd loads of info!

Although eyepiece focal length changes the size of the target it does not affect the resolution of the scope which is fixed by it's aperture. It's this that limits the amount of detail visible when seeing is good. The site allows you to choose from a range of scope sizes, this helps match the simulation to your view through the eyepiece.    

[Vega]

Mars viewing should be fine all month. The variance from early in the month to end is reasonably small.