[meteorite-list] Illusion of "sliding" comet

[John.L.Cabassi]

G'Day Rob, Jim and List
Really enjoyed that Rob and thank you Jim for stepping up and posting it
on your site. As for the slipping, that was intriguing, something I had
not thought about.

Cheers
John Cabassi
IMCA 2125

-----Original Message-----
From: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of
Matson, Robert D.
Sent: Tuesday, December 13, 2011 5:19 PM
To: Jim Wooddell; Meteorite Mailing List
Subject: [meteorite-list] Illusion of "sliding" comet


Hi Jim,

The "slide" you're seeing is due to our (or rather STEREO's) changing
perspective on the comet relative to the background. Remember that we
(and the two STEREOs) are in orbit about the sun, too, so there are two
motions going on. Our observing platform is sliding to the right
relative to the sun, coupled with the comet's parabolic orbit coming up
from the south.  --Rob

-----Original Message-----
From: Jim Wooddell [mailto:nf114ec at npgcable.com] 
Sent: Tuesday, December 13, 2011 4:57 PM
To: Matson, Robert D.; Meteorite Mailing List
Subject: Re: [meteorite-list] Link to Comet Lovejoy movie

Hi Rob,

No problem....glad to do it.

What is interesting....or am I looking at it wrong, it appears to be 
"slipping" as if in a cross wind....link an airplane slipping to make a 
landing ???

Jim

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