From: alan@greatarrow.com

Date: June 5, 2009 6:16:35 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] First Jupiter of   2   0   0   9!

Reply-To: alan@greatarrow.com

Hi Alberto, Certainly real. 

Best,

Alan

Sent from my Verizon Wireless BlackBerry

From: albe albo 

Date: Sat, 6 Jun 2009 00:03:11 +0000 (GMT)

To: <Astro_IIDC@yahoogroups.com>

Subject: Re: [Astro_IIDC] First Jupiter of 2 0 0 9!

Hi to all.

Admiration for all the predawn amateur astronomers!

Often i'm awake at that time but it's different to be operative for me because i have a roof hiding jupiter so i should transfer the scope on the other terrace...

Anyway i saw a stunning image taken by Mike Salway and i post the link:

http://www.astronomycamerasblog.com/2009/06/05/incredible-images-of-two-galilean-moons-occultation/

Question: the albedo details on Ganymede are only artifacts or part of them are real?

TTYL

Da: Milton Aupperle <milton@outcastsoft.com>

A: Astro_IIDC@yahoogroups.com

Inviato: Venerdì 5 giugno 2009, 16:19:10

Oggetto: Re: [Astro_IIDC] First Jupiter of 2 0 0 9!

Hi Jim;

On 5-Jun-09, at 7:02 AM, jimchung2338 wrote:

CSC predicted that seeing in Toronto in the predawn would be good so I woke up at 3:30 and found a spot beneath my huge silver maple that gave a clear SE view.  I wasn't able to wait for Jupiter to reach apogee so captured it as the sky was starting to lighten just before 5 AM.  Seeing was quite stable.  Captured with my C8 @ f20 and PGR Flea mono camera, stacked about 350/1200 per RGB channel.

http://tech. groups.yahoo. com/group/ Astro_IIDC/ files/Planetary/ June2009bJupiter .jpg 

That will be way better than anything I get this year, as Jupiter will at peak altitude only be 26° above the horizon up here.

My summer astro project is to retrofit some mirrors into a 16" truss dob that I acquired and build a Poncet platform to allow planetary imaging.  Stay tuned!

Very cool. I searched for "Poncet Mount" via Google and came up with several example and plans. Are you going for a single or dual motor version?

At least with a 16 mirror, you be gathering so much light that you can run at much lower gains and higher frame rates and maybe freeze the seeing between frames.

Milton J. Aupperle