[vsnet-chat 5439] Re: [vsnet-id 686] Re: Precise position of TZ Vel

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

----- Original Message -----
From: "Brian Skiff" <Brian.Skiff@lowell.edu>
To: <morel@ozemail.com.au>
Cc: <samus@sai.msu.ru>; <vello@pcug.org.au>;
<vsnet-id@ooruri.kusastro.kyoto-u.ac.jp>
Sent: Tuesday, August 06, 2002 12:50 PM
Subject: [vsnet-id 686] Re: [vsnet-chat 5437] Precise position of TZ Vel


>      It looks to me as though Mati got things slightly garbled.  The
> red variable is unamibguously GSC 8584-1180.  The position he gave is for
> a faint companion 8" northwest of the much brighter red star.  The best
> position is from UCAC1:
>
> TZ Velorum   9 30 27.59  -53 08 49.3  (2000)
   I. agree.
> The star appears in many catalogues back to the AC, where it was recorded
> in 1894.  Among the aliases:
>
> GSC 8584-1180 = IRAS 09287-5255 = MSX5C G275.4660-01.3474

   I initially also thought this GSC star could be TZ, but I rejected it in
favour of another star 3.3" NW
(r = 8.6, b=13.3, V =10.4  at 9:30:27.35  -53:8:47.2  in USNO-A2.0). Looking
at the r and b mags, this star was simply SCREAMING out for recognition, and
I found it impossible to ignore.  In hindsight it looks like the r mag. has
been horribly contaminated, but at the time would not have suspected that.
I think now that both the astrometry and photometry are a  bit off
Evidently a case of the photometry being wildly skewed by a companion,
believe it or not?

Regards,
Mati
morel@ozemail.com.au

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