[AZ-Observing] Re: Jupiter Impact Mark

Hi Jeremy,

As always, a great sketch! Your limb darkening is so spot on that sometimes
one has to remind themselves that this is a drawing. The impact scar looks
like it has spread and softened a bit. Great job, get some sleep!

Jimmy Ray

-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Jeremy Perez
Sent: Tuesday, July 21, 2009 4:18 AM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Jupiter Impact Mark

Sleep deprivation and cloud cover prevented me from attempting to  
observe this spot on the morning of July 20th. But tonight I was able  
to spend time with Jupiter in hopes of seeing the feature as it  
transited about 12:40 AM (July 21). As my 8 inch Dob cooled down, I  
worked on adjusting my eyes to details in the cloud belts. By 12:10  
AM, the seeing was improving, and Jupiter had rotated enough to make  
it clear that I was detecting a soft, dark spot near the southern  
pole. At 240X, I did not detect any structure in the feature, and it  
simply appeared as a soft, round spot, perhaps half the width of the  
south equatorial belt.

Over the next 45 minutes, I sketched its position, and all the other  
features I could detect. At times I've wished that I had taken up  
observing sooner so that I could have seen Shoemaker-Levy 9 pepper  
Jupiter with my own eyes. And what do you know, 15 years later, it's  
been hit again.

The sketch and full report can be found here:
http://www.perezmedia.net/beltofvenus/archives/001337.html

I'm looking forward to what others end up observing, photographing  
and sketching!

Jeremy
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