From Brian
COLVILLE
@. . . . . Attached are
my latest images taken during mid January.
There are not too many, mainly due to poor weather and equipment
difficulties (which still need a few clear nights to straighten
out).
Details are noted on the images. I hope everyone else is getting more out
of this years observing window that I am.
A few people are having difficulty opening my JPG files. Please let me know if you have any trouble.
Take care and clear skies,
(29
January 2001 email)
@. .
. . . February 8 was one of the better nights for decent seeing here in southern
Ontario, and it wasn't -25C either.
These images were taken through high cirrus cloud which preceded a warm
front.
These two images were taken around 00:40 UT through the IR and
methane filters. Additional data on
images. Cloud cover became too
thick before I could manage a RGB set.
I have attached both JPG
and GIF formats. Would those who
have had trouble with my JPG files please try this one, as I have made a few
changes in Photoshop. I would
appreciate knowing if this setting will work better.
(11 February 2001
email)
@. . . . . I have attached a set of IR and methane images taken last night (12 Feb) of Jupiter. Can someone confirm the identity of the prominent white oval in the methane image? I do not have a current position for BA, and this spot is appearing too soon to be BA and is somewhat larger by my judgment as well.
There was also an
interesting alignment Io, Europa, Ganymede, and Callisto. The four all fit inside a single CCD
frame in the form of a 'squashed' quadrilateral. The image was taken at the end of my
observing session, using the methane filter (did not change filters to avoid the
need to re-focus). There is a
definite difference in the apparent diameter of each moon, as well as a bit of
difference in brightness. The
strangest effect that I see is the soft/dim appearance of Callisto. The other
three all have distinct limbs. I suspect that there must be something different
in the way its surface reflects the sunlight at the methane wavelength. Any thoughts on this???
I have attached the images as JPG format, but I have used a different
program to generate them. Please let me know if this version is more user
friendly.
(13 February 2001 email)
Brian
COLVILLE (Cambray, Ontario,
Canada)
Maple Ridge
Observatory