Re: [APML] 'challenge'

[stephen pitt <lthuedk@pe.net>]

John: You got the chip! I'm happy for you.  I anticipate great stuff
from you. 
Unless there's a radical price decrease my owning one will remain in the
dream stage. The Nikon D100 would be my present limit, and only because
it could be used in my business.  Maybe in a year or two.  Stephen

 
John Boudreau wrote:
> 
> ----- Original Message -----
> From: "stephen pitt" <lthuedk@pe.net>
> To: <astro-photo@seds.org>
> Sent: Thursday, December 19, 2002 9:49 PM
> Subject: Re: [APML] 'challenge'
> 
> > Hi John:  If the transit speed is only .2 arc sec/minute, it would be a
> > long, long wait b/t exposures to boot.  If I waited 5 hours, saturn will
> > have only moved one minute of angle.  Thats not enough distance from M1
> > by any means to be free of Saturns light.  This isn't cometary speed. Is
> > the .2 arc sec/minute for real?  Stephen
> 
> Hi Stephen,
> 
> The .2 arcsecs/minute sounds about right for the little I know about this
> transit, and since for now I don't own any planetarium software I'll defer
> to Kevin Wigell and others that do ;o)
> 
> In my case, with a C11, it sounds like I'd have to make the M1 exposure
> nearly a week before the transit if I use film. Even if the weather
> cooperates my skies are light polluted to the point of having to greatly
> underexpose M1. I could use my ST-10 and that would allow a tighter schedule
> of  three days or so due to the smaller size of the chip, but along with
> little practice with it so far, unfortunatly I don't have the RGB filters
> for it yet ;o(
> 
> But as Steve Barnes has mentioned, it's sure to be cloudy anyway <g>
> 
> John Boudreau
> http://home.attbi.com/~jeboud/astro.htm
> 
> >
> > John Boudreau wrote:
> > >
> > > ----- Original Message -----
> > > From: "stephen pitt" <lthuedk@pe.net>
> > > To: <astro-photo@seds.org>
> > > Sent: Thursday, December 19, 2002 5:30 PM
> > > Subject: Re: [APML] 'challenge'
> > >
> > > > Brian and Chris: I understand the spirit of the photographic
> challenge,
> > > > but also think that two scopes acting simultaneously and using only
> two
> > > > frames is ethical.  Respectfully, Stephen
> > >
> > > Hi Stephen,
> > >
> > > This won't work, as your simultaneous long M1 exposure would be terribly
> > > flooded out by a horribly overexposed Saturn. According to S&T, Saturn's
> > > surface brightness is something like 250,000 x that of M1. The M1 shot
> has
> > > to be taken when Saturn's not in the scope's FOV around M1.
> > >
> > > John Boudreau
> > > http://home.attbi.com/~jeboud/astro.htm
> 
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