[vsnet-ip 10] (fwd) Re: DO Dra and YY Dra (from Samus)

[Taichi Kato <tkato>]

(fwd) Re: DO Dra and YY Dra (from Samus)

Date: Mon, 27 Nov 2000 14:57:18 +0300 (MSK)
From: "Nikolai N. Samus" <samus@sai.msu.ru>
Subject: Re: [vsnet-id 307] Re: DO Dra and YY Dra

Dear Dr. Kato,

Your finding is very interesting. However, I don't believe that RW UMa and
YY Dra are the same. Tsessevich told me that his star was "In a half
degree" - I could not understand his remark, but now I know that his
position was exactly in a half degree from the center of his plates, Z
Dra.

I am now far from my desk, but, upon return, I'll study your suggestion
more attentively. As far as I remember, no other minima of YY Dra are
known.

Best regards
Kolya

On Sat, 25 Nov 2000, Taichi Kato wrote:

> Re: DO Dra and YY Dra
>
> Dear Prof. Samus,
>
>     I have found an interesting thing.  After 50-years' precession, the
> coordinates of RW UMa almost exactly (within a few arcmin) south to the
> published position of YY Dra.  The R.A. is almost the same, and the declination
> is 20 degrees different.  Furthermore, the published YY Dra epoch of eclipse
> almost exactly corresponds to the E=-3544 eclipse of RW UMa.
>
>     Would it have been possible that Tessevich reported the 1950 coordinate,
> insted of the 1900 ones (for example), and had an error in the first digit
> of declination?  Examination of other reported minima (which are not available
> here) against the RW UMa ephemeris could easily test such a possibility.
>
> Regards,
> Taichi Kato
>

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