[Aavso-photometry] Comet 17P/Holmes

[Chuck Pullen]

Using Xephem and a DSS image, the object NE of the core (Jeff's image  
is mirrored - North is Up, East is Left)  is the star GSC 3334-0336  
(mag 13.5, way off as most GSC mags are) which plots from the center  
of the comet at 0500UT as being 40 arc sec PA 34 degrees.  The bright  
star just at the edge of the coma (7 o'clock) in Jeff's images is  
Tyc  3334-788-2 (10.29, F9).  The faint star to it's left is it's  
alleged companion, Tyc 3334-788-1 (10.89, F6).

So, at least last night, no obvious nucleus fragment is shown!  But  
some time will have to be spent with some of the other images to be  
sure.  In my copious spare time, I will attempt to do so.

Chuck (PCH)


On Oct 29, 2007, at 9:00 AM, aavso-photometry-request at mira.aavso.org  
wrote:

>
> ------------------------------
>
> Message: 2
> Date: Sun, 28 Oct 2007 18:16:11 -0700
> From: Jeff Hopkins <phxjeff at hposoft.com>
> Subject: Re: [Aavso-photometry] Comet 17P/Holmes
> To: Chuck Pullen <pullenc at gmail.com>, "Pamela L. Gay" <pgay at siue.edu>,
> 	aavso-photometry at mira.aavso.org
> Message-ID: <a05210600c34ae41c142b@[65.39.86.82]>
> Content-Type: text/plain; charset="us-ascii" ; format="flowed"
>
> 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
>
>
>
>
> Message: 3
> Date: Mon, 29 Oct 2007 00:27:53 -0700
> From: Jeff Hopkins <phxjeff at hposoft.com>
> Subject: [Aavso-photometry] Comet 17P Holmes  UBVRI Images and
> 	profiles
> To: aavso-photometry at mira.aavso.org
> Message-ID: <a05210604c34b3ba9a60d@[65.39.86.82]>
> Content-Type: text/plain; charset="us-ascii" ; format="flowed"
>
> I took some UBVRI filter images of the comet. You can see the image
> and the comet's profile at
>
> http://www.hposoft.com/Holmes.html
>
> Some surprises.
>
> Jeff
> -- 
> Jeff Hopkins
> HPO SOFT
> Counting Photons
> http://www.hposoft.com/Astro/astro.html
> Hopkins Phoenix Observatory
> 7812 West Clayton Drive
> Phoenix, Arizona 85033-2439 U.S.A.
> (623)849-5889
> (623) 247-1190 (Fax)
> www.hposoft.com
>
>
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> End of Aavso-photometry Digest, Vol 47, Issue 24
> ************************************************

Chuck Pullen
pullenc at gmail.com