Re: [APML] 'challenge'

["Matt BenDaniel" <matt@starmatt.com>]

John Boudreau said:
> A double exposure would be the way to go, *if* the
> scope/camera/autoguider setup could be left _untouched_ for a day or

Why the "untouched" requirement?  If the camera is always oriented
orthogonally to the celestial axes, and if the images are centered in
more-or-less the same place, what's the problem?  Your untouched
requirement is ethical not technical, right?

BTW if Saturn is in or near the FOV, its glow may "pollute" the image.

Also, we're assuming that none of us have the resolution to register the
motion of the Crab during the intervening period.

Matt

> two. One could take a long exposure of the Crab Nebula before Saturn
> gets in the FOV. Then just image Saturn with a quick exposure on the
> same frame during it's M1 transit.
>
> Anybody with a permanent setup in an observatory would have a decent
> chance at this. Of course focus could be off a bit between days, and
> there could be some film creep. But nobody ever said this hobby is easy
> <g>.
>
> John Boudreau
> http://home.attbi.com/~jeboud/astro.htm
>
> ----- Original Message -----
> From: "Dale Ireland" <direland@drdale.com>
> To: "APML" <astro-photo@seds.org>
> Sent: Thursday, December 19, 2002 3:44 PM
> Subject: [APML] "challenge"
>
>
>> Saturn passes across the Crab Nebula Jan 3. That should be a real
>> photo "challenge"
>>
>> Dale
>>
>>
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-- 
Matt BenDaniel
http://starmatt.com



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