...$6\hbox{$.\!\!^{\prime\prime}$ }2$

The literature consistently quotes  $6\hbox{$.\!\!^{\prime\prime}$ }1$, although accurate HST and VLBI astrometry yields values of  $6\hbox{$.\!\!^{\prime\prime}$ }169$ and  $6\hbox{$.\!\!^{\prime\prime}$ }175$, respectively (Bernstein et al. 1997).

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...

The GSC-II is a joint project of the Space Telescope Science Institute and the Osservatorio Astronomico di Torino.

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... (IDL)

A product of Research Systems, Inc.

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... 1997

The data table is available at http://www.astro.uio.no/~jeovalds/DQmags.html

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... collaborators

See data table at http://cfa-www.harvard.edu/~rschild/

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