[Lvas] Sirius

[Shawn Mann]

Hey, thanks for the heads up, I am definitely going to check it out.



On Tue, Jun 23, 2009 at 6:07 AM, roger ivester <drivester at hotmail.com>wrote:

>  All,
>
> Sirius and Sirius B have a 51 year cycle cycle and at current has
> a separation of 7 arc seconds. There has never been a period in my observing
> career that I have had opportunity to observe "Sirius B" or AKA "The Pup".
> In the late seventies I did not have a scope worthy to see the companion.
>
> It's widest separation of 11.5 arc seconds occurred last in 1975 and again
> in 2025.
>
> First discovered in January 31th 1862 by Alvan Clark using an 18.5 inch
> refractor, then the largest refractor in the world.
>
> This scope is still in use today at Northwestern University in Illinois.
>
> Jim Mullaney told me yesterday that Sue French had seen the companion in
> her 4.1-inch Astro-Physics Traveler Refractor.
>
> Jim, said that he has observed it also using an 8-inch SC scope. These are
> the first reports that I have heard of in "current" times of someone seeing
> the companion.
>
> I am planning on some very early morning observations in late September and
> October. I have waited a lifetime to see the companion. I am going to
> attempt with both my 4-inch refractor and 10-inch reflector. If
> conditions are not perfect I normally use a 4.25-inch off-axis mask on my
> reflector. It will reach a separation of 9.0 arc seconds by 2012. I want to
> see it during a more difficult period...however from my understanding it is
> never been easy even at its widest point.
>
> This should be an object that anyone living within the city limits of Las
> Vegas could attempt. This would be quite a story for someone to achieve this
> feat.
>
> Start thinking about it and doing a little research on techniques and
> procedures. You would want to draw the companion, showing the cardinal
> points to insure that you are indeed seeing Sirius B.
>
> roger
>
>
>
>
>
> *    The moon and stars to govern the night.....   Psalm 136:9*
>
>
>
>
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