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Re: (meteorobs) Question about Leonid photo
Here's my guess on the astronomy picture of the day question.
The camera is facing north-northwest and while the photo is being taken the
radiant is rising behind the camera. That would mean the angled Leonids came
early in the exposure while the trains that appear to come straight down are
later when the radiant is high in the sky.
I would think that this exposure was longer than 40 minutes though. Can
anyone tell if that is accurate based on the length of the star trails?
Michael Clark
mrclark@internetcds.com
Ashland, Oregon, USA
----- Original Message -----
From: "Ed Cannon" <ecannon@mail.utexasdot edu>
To: <meteorobs@atmob.org>
Sent: Wednesday, December 12, 2001 10:53 PM
Subject: (meteorobs) Question about Leonid photo
> On the Astronomy Picture of the Day for Dec. 12, there was
> a nice Leonid photo:
>
> http://antwrp.gsfc.nasadot gov/apod/ap011212.html
>
> This is just to ask about the angles of the meteors. They
> don't appear to be radiating from one point (To the left of
> the observatory they appear to be approaching each other.),
> but I know it has to be something about the optics of the
> system and/or the radiant's motion over a period of time.
> I'm not a photographer, so I know very little about types
> of lenses, etc.
>
> Ed Cannon - ecannon@mail.utexasdot edu - Austin, Texas, USA
>
> The archive and Web site for our list is at http://www.meteorobs.org
> If you are interested in complete links on the 2001 LEONIDS, see:
> http://www.meteorobs.org/storms.html
> To stop getting email from the 'meteorobs' list, use the Web form at:
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The archive and Web site for our list is at http://www.meteorobs.org
If you are interested in complete links on the 2001 LEONIDS, see:
http://www.meteorobs.org/storms.html
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