Re: [ATM] Using what we build.

["Stars" <rocketmaker@intergate.com>]

Hi Dominic:

Yes, comets come in all sizes and colors. Probably none as spectacular as 
Comet Hyakutake in 1996. It left a bright blue trail over 90° of the sky and 
it was hard to capture it all. Hale-Bopp fit nicely in a standard 50mm/35mm 
film format. Nasa/JPL have my photo taken over the 200" telescope. In this 
case the comet Holmes has not developed a tail. It does have an interesting 
coma that can be seen divided into two shells. At this point it probably 
would not help to photograph it in a wider field and at the moment 200mm is 
the shortest focal length that I can use with the DSI CCD. It is cloudy at 
the moment but I plan a close up with a 6" f:6 at a community star party 
Friday if not sooner. More exposure starts to obscure the core. In fact I 
have been trying to find comparable photos and they all seem to obcure the 
core structure so there are trade-offs but I believe being able to see the 
core and shell structure has the greater educational value.I do plan to 
adapt an 80mm f:1.8 lens to the CCD but unless this comet developes a tail, 
it will have to wait as I am working on this handicapped accessible 
observatory. Hope you have a fine warm fire for those long Swedish Nights.

Best,
Rick


----- Original Message ----- 
From: "Dominic-Luc Webb" <dlwebb@canit.se>
To: <rocketmaker@intergate.com>
Sent: Friday, November 09, 2007 2:11 PM
Subject: Re: [ATM] Using what we build.


>
> I have yet to see this beast, but some comets I have seen
> really covered a lot of sky. I never had much luck getting
> really good images that fully showed the extent of the tail.
>
> I suppose this one will look very different from most others.
> I would urge you to try some longer exposures with a bit
> wider field than 1.5 degrees, although 3 moon diameters is
> not bad. Whatever you end up with, I would certainly like to
> see the result.
>
> I am up near Uppsala Sweden, and it looks like snow and fog
> for the foreseeable future.
>
>
> Dominic
>
> 


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