LtE in CMO #240


 @. . . . . 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


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