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Tuesday May 16, 2016 at 8:45 PM
Announced by our Observatory Director on Sunday, May 14, 2017 at 6:05 PM

Status updated by our Observatory Director on Tuesday, May 16, 2017 at 4:10 PM...
Event Report: Posted by our Observatory Director on Tuesday, May 16, 2017 11:23 PM...

We had a good observing session this evening. Jupiter put on a marvelous show presenting us with an occultation of Ganymede. However, unlike the occultation of Io on April 26th, tonight's event lasted quite a bit longer as Ganymede hovered near the limb of Jupiter for about 30 minutes before disappearing behind the planet. The extra time gave everyone multiple chances to observe the event. The Iridium Flare at 9:28pm was well-placed and one of the brightest we've seen in a while (magnitude -5.8). We observed open cluster M67, globular cluster M3, The Ghost of Jupiter (NGC 3242), and the double star Mizar before clouds moved in around 10:15pm. Turnout was pretty good with many members and non-members coming out to stargaze.

Public Observing Event
at the ACA Observatory


Impromptu Event!

It looks like a great evening for stargazing; cool temperatures, low humidity, and clear skies.

Here's what's on the observing list for tonight...
*  Jupiter will be well-placed for observing
*  An exceedingly bright Iridium Flare will be observable during the star party
*  Galaxies of the Virgo Cluster
*  Star clusters M3 & M67

  Click for MAP & DIRECTIONS to ACA Observatory

.Visible satellite passes from the ACA Observatory:

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Live AccuWeather Satellite Mosaic

Solar System objects rise/transit/set times from the ACA Observatory on the date of this event...

Jet Stream
updates automatically to latest available image)
    The Jet Stream affects astronomical "seeing" (steadiness of the air)
    If we're in a gray area, seeing will not be as good as in a white area.
    If we're in a white area, the shorter the arrows, the better.

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