[vsnet-chat 334] Re: Positions of T Boo, V1830 Sgr.

[Mati Morel <morel@ozemail.com.au>]

Hi chatters,
There is an interesting article on T Boo in Sky & Tel, 39,87, 1970,
which gives more information on the circumstances of its discovery.
Finder charts are given, but they do not help to precisely identify
Baxendell's object.  It indicates that Baxendell's published position
may be a bit rough, and therefore later attempts at identification
(such as Duerbeck's) may be suspect, if the published position is
taken too literally.

V1830 Sgr.  
Stan Walker's problems with this star may be alleviated by referring
to VSS, RASNZ chart 582. The star that Stan calls "tenth mag" is 
actually 12.0V.  The position of V1830 Sgr, as plotted on the chart,
is accurate to within +/- 5" of arc, but there still some uncertainty
as to which of several faint stars in the vicinity is the variable.
Even Downes and Shara (1993) give only a semi-precise position.
From memory, I think one of the professionals (N. Vogt?) reported 
that V1830 is 17-18 mag at minimum (rather than 14.5 originally),
so he must have been able to find it with certainty. Has anyone
got a precise position?

Regards,
Mati Morel

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