Horsehead - only 51 minutes of data

[strongmanmike (Michael)]

Originally Posted by alpal

A faint shell doesn't need resolution.

cheers
Allan

Well actually there are some subtle details in that shell too, so I was concerned they might be missed at bin 2X2 but I was again probably over worried

Mike

[alpal]

Originally Posted by strongmanmike

Well actually there are some subtle details in that shell too, so I was concerned they might be missed at bin 2X2 but I was again probably over worried

Mike

Well yes Mike,
your SXVF-H694/ AG12 combo is giving 0.81 arc seconds per pixel
at binning 1x1 & 1.62 arc seconds at binning 2x2.

Are you getting better than 1.6 arc seconds seeing?

[strongmanmike (Michael)]

Originally Posted by alpal

Well yes Mike,
your SXVF-H694/ AG12 combo is giving 0.81 arc seconds per pixel
at binning 1x1 & 1.62 arc seconds at binning 2x2.

Are you getting better than 1.6 arc seconds seeing?

Ummm?...probably not often

BUT, let's see?... on good nights like for THIS and THIS it may well have been, at least for much of the data collection, but I don't know exact figures..?

Mike

[alpal]

Originally Posted by strongmanmike

Ummm?...probably not often

BUT, let's see?... on good nights like for THIS and THIS it may well have been, at least for much of the data collection, but I don't know exact figures..?

Mike

They are magnificent images Mike.

I get some idea by using the information tool in Maxim DL.
I measure the FWHM.
As I said the best I ever measured was 2.4 arc seconds from Melbourne.
Jupiter is just a fuzzy ball with 2 lines through it from Melbourne
but on Mt Baw Baw at 5,000 feet altitude it's as sharp as a tack.
I bet Mt Baw Baw has better than 1 arc second seeing sometimes.
Your site probably has seeing down to 1 arc second on some nights or parts of nights.
I notice that it can change - regardless of focus on the same night -
it can go from 2.8 arc seconds to 5.6 in a matter of 2 hours.

[strongmanmike (Michael)]

Originally Posted by alpal

They are magnificent images Mike.

I get some idea by using the information tool in Maxim DL.
I measure the FWHM.
As I said the best I ever measured was 2.4 arc seconds from Melbourne.
Jupiter is just a fuzzy ball with 2 lines through it from Melbourne
but on Mt Baw Baw at 5,000 feet altitude it's as sharp as a tack.
I bet Mt Baw Baw has better than 1 arc second seeing sometimes.
Your site probably has seeing down to 1 arc second on some nights or parts of nights.
I notice that it can change - regardless of focus on the same night -
it can go from 2.8 arc seconds to 5.6 in a matter of 2 hours.

So, now you see why I just stick to Bin 1 X 1...juuust in case

Oh an I also get shocking seeing too by the way ...keeps life interesting I guess

I've posted this before and getting a bit off topic but speaking of seeing

This shows the difference the atmosphere can make even to medium FL deep sky imaging... same object, same site, same scope, same camera, same imager

Centaurus A

[alpal]

Thanks for that comparison pic Mike,
That shows it all.
Seeing is everything - the pics are like chalk & cheese.

Still - you'll be tempted to click 2x2 one night - LOL

cheers
Allan