ACA event on Saturday 8/18/2007 - 8:30pm EDT

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* *
This event will occur as scheduled unless rain is imminent * *
If a cancellation is dictated by weather conditions,
it will be announced here by 7:00pm on 8/18/07


There are several events occurring with Jupiter on Saturday night/Sunday morning, 8/18/07 and 8/19/07
when we have our rescheduled Jupiter event at the observatory.
Any one of these events would make for a great imaging opportunity, for those of us so inclined,
but personally, I'm looking forward to seeing them visually!

Jupiter Data:
    Magnitude: -2.3
    Distance: 4.95159543 AU = 740,748,133 km = 460,279,556 miles
    Phase: 99.14% illuminated
    Elongation from Sun: 104.40 degrees (evening sky)
    Apparent size: 39.81 arcseconds in angular diameter

Jupiter satellite events:
    Io transit start: Saturday Aug 18, 2007 at 11:09pm EDT
    Io shadow transit start: Sunday Aug 19, 2007 at 0:24am EDT
    Io transit end: Sunday Aug 19, 2007 at 1:20am EDT
    Io shadow transit end: Sunday Aug 19, 2007 at 2:36am EDT
Jupiter GRS events:
    Transit of GRS (Great Red Spot): Saturday Aug 18, 2007 at 11:22pm EDT
    based on GRS longitude of 116.4
Here's an animated GIF to demonstrate what we'll be able to see.
Frames are ten minutes apart running from 10:00pm Saturday until 1:40am EDT Sunday
(Note that Jupiter's Altitude (in degrees) and Azimuth (in degrees) are shown above the date/time)


For the computer techno-geeks among us:
1)  Animated image created with single screen-captures of Jupiter displayed with Guide8
2)  Single GIFs created & each frame cropped using ThumbsPlus
3)  Animated GIF created from single GIF frames using UnFREEz.exe
     (Special thanks to John Crilly for telling me about the UnFREEz.exe program!)
See you Saturday the 18th!