[Aavso-photometry] Comet 17P/Holmes

[Jeff Hopkins]

At UT 25 October 2007 06:00

Comet 17P/Holmes was V= 2.362

This was using delta Per as a comparison star with V= 3.01.

I used a DSI Pro cooled, with 12" LX200 GPS at F3.3

I also did a 3D plot of the pixels.

See   See http://www.hposoft.com/CometHolmes.JPG

Jeff



At 17:14 -0700 10/28/2007, Chuck Pullen wrote:
>I've noticed the central whatever in the images too.  A guy from a
>local star party says he saw the object in the center of the coma
>visually on Friday, so it's not hot or saturated pixels.  Using X-
>ephem and updated orbital elements, I don't see that the comet has
>passed any star much brigher than 18th mag or so in the last 4 days.
>Tonight it will be within 30 arc sec of a Tycho double star of about
>10th mag for each component.  If they show up in an image, they could
>be used as a very rough comp for the brightness of whatever this is.
>
>Chuck
>
>Chuck Pullen PCH
>
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-- 
Jeff Hopkins
HPO SOFT
Counting Photons
http://www.hposoft.com/Astro/astro.html
Hopkins Phoenix Observatory
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