Posted 09 April 2013 - 03:10 PM
Posted 09 April 2013 - 07:55 PM
So, the likely explanation for your difficulty is "seeing" in the sense of atmosphere wobbles. The brightness difference of the stars (~2.7 mags) makes it harder, and more subject to atmosphere not co-operating, despite the separation being wider than Dawes for a 3-inch scope.
Last time I looked at it (5.5-inch refractor) I needed 160x-200x in 7/10 seeing to show the pair. I'd expect a 4-inch would depend more on steady seeing, being only a little less sensitive to atmosphere.
Posted 09 April 2013 - 08:24 PM
Sometimes revisiting close pairs like that can be a reminder of just how good the seeing needed to be to really show it off. I've often been so taken with the great view that can be so vivid I want yo believe its easier to see than it was. Then a night comes doing, the seeing smears the companion into oblivion and I realize how exclusive those conditions really were,
I'm sure your eyes are fine.
Posted 12 April 2013 - 09:32 PM