Re: Re: [ATM] Off topic - observed the Venus transit - ghost halo?

[Matheus Jatkoske Lazo <mjlazo@if.sc.usp.br>]

Yes, I did notice the ghost halo after 3rd contact here from Brazil. I used a 
zeiss AS 100/1000 with filter and a zeiss 6mm ortho.  

Em Qua 09 Jun 2004 08:10, Wouter van Reeven escreveu:
> Hi Tom,
>
> On  0, "Krajci, Thomas J" <KrajciTJ@state.gov> wrote:
> > I observed the Venus transit from Central Asia in pretty good seeing
> > conditions.  I did not notice much of a black drop effect...which appears
> > to echo the comments of many others.
> >
> > However, I did notice a 'ghost halo' effect shortly before 2nd and
> > shortly after 3rd contact.  The portion of Venus that was slightly off
> > the sun's disk was surrounded by a thin, faint halo.  This was most
> > pronounced when less than 50% of Venus was 'off' the sun.  I pointed this
> > out to other observers, and they all saw it too.
> >
> > We used a 10 inch f/7 dob, stopped down to 8 inches and using Baader
> > astro filter film at a magnification of 70x.  Seeing was quite good at
> > times - a cloudless day.
> >
> > Did anyone else note similar observations?  Any web sites with photos,
> > drawings, or text about this?
>
> The Sky and Telescope edition of June 2004 (iirc) has a few drawings
> that show the same halo effect during the 1882 transit. So far I haven't
> heard of anyone who has seen this during this transit, however.
>
>
> Clear skies!
>
> Wouter van Reeven


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