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SKYWatch: Jupiter

On November 4th, we tracked three of Jupiter's moons for several hours.  Io can be seen disappearing behind Jupiter, then re-appearing.  Use Guy Ottewell's Astronomical Calendar 1999 to figure out which moon is which.  Which way are the moons traveling in their orbit? (The telescope was set  up in alt/az mode; that is why the plane of Jupiter and its moons does not remain horizontal on the image. If the telescope were set up in equatorial mode, the image would not seem to rotate.)

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jup.jpg (5224 bytes)When you open the images of Jupiter, you have to adjust the display to see the moons.  These images show the moons because log scaling is checked.  Without log scaling you can see the bands in the atmosphere of Jupiter.  Use the axes tool to find the center of Jupiter, then use slice to measure from a moon to Jupiter's center in each of the images.  These tools can help you figure out how the moons are moving with respect to Jupiter.    

** HOU Participants: Download the .fts images of Jupiter on November 1st. See also Jupiter's Bright Moons.

** HOU Participants:  Download the .fts images of Jupiter on November 4th.

Download images of Jupiter and two of its moons taken on October 27th, 1999, by Frank Mills. 

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