[AZ-Observing] Re: Comet Lulin this morning

Wonderful image, Chris!

I suppose that if we know it is a 40-minute exposure with 5-minute
sub-frames, it would be possible to calculate the comet's tangential
displacement and then, knowing the ephemerids, compute the true space
velocity... but I don't feel that ambitious today. 


Richard Harshaw
Cave Creek, AZ


-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Chris Schur
Sent: Thursday, February 26, 2009 2:57 PM
To: Rik Hill; Az Observng list; gallery@xxxxxxxxxxxxxxxxxxx; Jerry Bonnell
APOD; Joe Orman; Wayne Johnson; Albert Levy; John O'Farrell; Thelma/John
Ofarrell; Rich Jacobs; Robert Nemiroff APOD
Subject: [AZ-Observing] Comet Lulin this morning

Here is my shot of comet Lulin at its peak brightness this morning, rapidly
approaching Regulus, it is moving very fast and can be seen streaking past
the colorful stars:
 
http://www.schursastrophotography.com/xtiastro/lulin022609.html
 
 
Comments?
 
Chris

      
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