Re: sun transit

From: T V I (tvinvestigations@yahoo.co.uk)
Date: Tue Feb 24 2009 - 08:21:35 UTC

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I would never discourage anyone from at least having a try , providing you have the correct filters...but I suspect the angular diameter of the object is too small to be seen with the set up you describe.

Having said that.....give it a go .... if nothing else it will be good practice for a transit of ISS , which on a good transit has an angular diameter of over 40" !

John 






--- On Tue, 24/2/09, Difflimited@aol.com <Difflimited@aol.com> wrote:

> From: Difflimited@aol.com <Difflimited@aol.com>
> Subject: sun transit
> To: SeeSat-L@satobs.org
> Date: Tuesday, 24 February, 2009, 1:22 AM
> I got an alert from CalSky:
> Cosmos 2445 / 33438/  08 058A
> Crosses the disk of Sun. Separation=0.133°  Position 
> Angle=134.7°.  Transit 
> duration=0.38s
> Angular diameter=2.8"   cylindrical, 4.0m x 2.0m 
> Satellite at Azimuth=142.4° SE    Altitude= 34.1° 
> Distance=331.6 km 
> In a clock-face concept, the  satellite will seem to move
> toward  9:33
> Angular  Velocity=73.9'/s
> 
> Is is realistic to see this with a 80mm f/11 at  100x?
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