[vsnet-alert 14597] Re: [AAVSO-DIS] Tycho-2 8950-00145-1 in Carina

[Brian Skiff]

     The preferred name is CPD-63 1210, and coordinates are:
9 53 18.55 -64 12 50.6  (J2000, UCAC2).  The visible-light and
2MASS colors (J-K = 0.85) suggests a modestly-reddened K-giant,
about like you'd expect in this part of the sky.  You wouldn't 
ordinarily expect much action from such a star.  I note that the
ASAS-3 lightcurve is dead flat at V = 10.52 with rms scatter of
0.028 mag (typical of a constant star in ASAS-3 at this magnitude)
over 8 or 9 seasons and ~600 observations.
     Do generic searches of further suspects in ASAS-3 here:

http://www.astrouw.edu.pl/asas/?page=aasc



\Brian


On Thu, 2012-05-17 at 13:59 +1000, Rob Kaufman wrote:
> A query because this star isn't in AAVSO's VSX and I can't find any
> reference to variability within the limited resources I'm familiar with.
> AKA NOMAD1 0257-0145462, USNO-B1 0257-0143923, UCAC2 3451623, Vmag 10.55.
> I picked it up in blinking.  On 15 May it showed as a bright star around
> the quoted magnitude, but last night (16 May) it was completely absent from
> 3 frames taken over about 7 mins, with limiting magnitude around 12.5
> (unfiltered DSLR).  Here's a link to an animation:
> http://i727.photobucket.com/albums/ww271/Rob_Kau/Tycho-28950-00145-115-16May2012anim.gif
> 
> 
> This is a new area of sky for me and I don't have an archive of images to
> check for previous variability.  Would greatly appreciate advice as to
> whether it's a known variable (eclipsing binary?) - thanks.
> 
> Cheers -