PSN-L Email List Message

Subject: Re: quake picture
From: JIm Hannon
Date: Mon, 28 Jun 1999 20:22:17 -0500


Edward Cranswick wrote:

> Jim-
>     Fascinating! but why only the bottom star? and why do some stars seem to
> blurred from rotation and others are not?
> -Edward
> --
> Edward Cranswick                Tel: 303-273-8609
> US Geological Survey, MS 966    Fax: 303-273-8600
> PO Box 25046, Federal Center    cranswick@........
> Denver, CO 80225-0046  USA      E.M. Forster said, "Only connect".

Edward,
If you look closely at the picture you will see some movement of some of the other
brighter stars. The bottom star is the brightest and has enough light to record on
the CCD camera while moving. These picture generally take several minutes of
exposure so only the brighter stars would show the streaks during the quake.
--
Jim Hannon
http://soli.inav.net/~jmhannon/
42,11.90N 91,39.26W
WB0TXL



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Larry Cochrane <cochrane@..............>