λ Cygni

[cotterless45]

Going to have another shot at this, assuming that it's widening,

http://webbdeepsky.com/double-stars/

Nick.

[Tzitzis]

Good luck then

[jkwhinfrey]

Ambitious, let us know how you get on... good or bad

James

[chiltonstar]

Good luck Nick - should be possible as I can manage it occasionally with 127mm.

Chris

[laudropb]

Good luck. I have never managed a clean separation with this, but if it is separating I will give it another go, if and when I get a clear sky.

[chiltonstar]

I've tried simulating this pair using Excel (for 127mm aperture), and with excellent seeing, the peak-to-trough ratio is about 15% - a bit easier than the Dawes limit.

Chris 

[John]

Good luck with Lambda Cygni Nick.

I've had fairly frequent goes at it with my ED120 since it's been well placed but so far the "snowman look" is the best I've done with it. I'm waiting for an exceptional seeing night I think ....

[chiltonstar]

With excellent seeing through the haze here last night, I had a go (sorry about the quality - I have the artistic skills of a carrot) at sketching Lambda Cyg, while I was waiting for the main event of the evening to appear. Seeing was excellent, with sharp, stable diffraction rings, even at x300, which I can achieve with my Mak on only a few nights per year.

Chris

  

[jkwhinfrey]

Well done. That's a tough one... and I should add that you've given me a new respect for carrots

James