[vsnet-chat 3895] Re: RZ Leo astrometry

[Taichi Kato <tkato>]

Re: RZ Leo astrometry

> The discrepancy with Simbad is that Simbad is using the
> coordinates from the first CV catalog (Downes and Shara,
> PASP 105, 127, 1993, also known as D&S).  There was a
> misidentification in that earlier catalog.  This is a common
> problem with CVs that did not have good astrometry when
> they were discovered in outburst and which have not been
> seen in outburst since.  Downes and Shara have done the
> best job they could, but you will find many such
> misidentifications on the poorly observed cataclysmics.

    I rather think that the importance of accurate astrometry was not
properly recognized then, or by variable star researchers.  Variable star
researchers tended to think accurate finding charts supersede astrometry.
Given the secure identification on the 1984/1985 outburst, and the
published correct identification and already existent quiescent observations,
there couldn't have been, even at the time of late 1980's, such a large
error if the importance of astrometry had been considered.

Regards,
Taichi Kato

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