--- In OAFs@y..., attilla.danko@s... wrote:
--- In OAFs@y..., "Bruce McGlashan" <mcglashanb2@h...> wrote:
As at Mike's, there was a
colour gradient across the disk, at about a 45 angle. In the NW,
it
appeared yellow-white, while in the SE, it appeared more orangish,
with a
tinge of turquoise-blue right at the edge of the disk. Could that
be
chromatic aberration?
Its much more likely to have been caused by the atmosphere
rather than your scope. All objects when observed at low altitudes
tend to show it, its just easiest to see on planets. The real
proof is to rotate your scope. Atmospheric chromatic dispersion
wont rotate. It will always show a color separation up and down.
On a polar aligned scope, that might look like a 45 degree angle
depending on how your star diagonal is aligned.
Thanks! I'll check this out next time.
by 03:00 I was getting tired and cold.
An impressive observing seesion for a weeknight.
Maybe not. I'm on vacation this week.
-ad
Bruce McGlashan
p.s. In case I don't talk to any of you beforehand, I hope the weather
cooperates tonight and on Saturday. I'm off to Toronto tomorrow, for my
brother's wedding Saturday, so I won't be participating in any activities
until next week.
