|
Here's a few random ideas:
1) Use a cooling fan on your mirror to get it down to ambient temperature
2) Make sure your collimation is spot on
3) Try when it's high in the sky & you're viewing through less atmosphere
4) Keep trying. Close doubles can be very sensitive to seeing conditions. A case in point is Antares: some nights I can split it with ridiculous ease, & other nights not at all.
|