Jump to content

sgl_imaging_challenge_6_banner_jupiter_2021.jpg.eacb9f0c2f90fdaafda890646b3fc199.jpg

 

 

Lambda Cygni - AN's August star of the month....


Recommended Posts

It would be interesting to see how small a scope can split Lambda Cygni at the moment: mags are 4.73 and 6.26. sep is 0.9 arcsec, PA 359 degrees. Quite a fast mover - 390 year orbit.

With my 180 Mak it is a beautiful pair with the secondary as a very bright pinpoint alongside the primary (a very close double itself), both a blueish white colour.

My 127 Mak (true aperture 119mm) splits it on a good night, but with some difficulty and certainly not as cleanly as the 180 Mak.

Anyone split it with smaller refractors??

Chris

  • Like 7
Link to comment
Share on other sites

Could give it a try at silly power with the Tak I guess Chris. Should try with the C925 too, it's one I've never split. It will probably end up as another Zeta Herc i.e. One I've never split!

Thanks for the post, must get out there again soon.

  • Like 1
Link to comment
Share on other sites

4 hours ago, Stu said:

Could give it a try at silly power with the Tak I guess Chris. Should try with the C925 too, it's one I've never split. It will probably end up as another Zeta Herc i.e. One I've never split!

Thanks for the post, must get out there again soon.

Should be easy with the C9.25 if properly collimated,  say at 300 times mag. 

Chris

 

  • Like 1
Link to comment
Share on other sites

7 minutes ago, chiltonstar said:

Should be easy with the C9.25 if properly collimated,  say at 300 times mag. 

Chris

 

Will give it a try. My collimation does need a tweet, it is not bad, but not spot on and I know that makes a big difference with SCTs

  • Like 1
Link to comment
Share on other sites

I had a crack at the Lambda Cygni double star tonight and failed to split it. I have to admit that I had a bit of a defeatist attitude approaching the target after reading that the separation was only 0.9". The best I can say is that the star didn't look exactly round at 200x magnification. Quite a nice looking blueish star to my eyes. Conditions were pretty good as well  - good transparency.

Edited by David Levi
  • Like 1
Link to comment
Share on other sites

  • 3 years later...

4 years on ........

I got a nice split of Lambda Cygni tonight with my 130mm refractor at 300x. Almost a touching pair but just that sliver of black between them to allow the "split" box to be ticked :icon_biggrin:

This one makes Zeta Herculis seem somewhat easy. Got that one tonight as well.

  • Like 3
Link to comment
Share on other sites

You waited 4 years..........?

Not an easy one, but splits on a good summer night with my 180 Mak, although if the seeing isn't optimum, the secondary disappears into the primary.

Chris

  • Haha 1
Link to comment
Share on other sites

1 hour ago, chiltonstar said:

You waited 4 years..........?

 

Nope - just the first clear sky for ages and the big refractor out and cooled :icon_biggrin:

 

 

  • Like 1
Link to comment
Share on other sites

  • 2 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.