[vsnet-newvar 1785] CMC12 190540.3-000154 is a Mira variable

[jg@jgws.freeisp.co.uk]

CMC12 190540.3-000154   -   Mira variable

RA2000 :   19h05m40.35s
Dec2000:  -00d01'54.6"

r' mag  14.121  s.d.  2.439 from 4 observations

Variation is just about evident on three red images from the NOFS
server, but is clearer and easier to see in the three blue plates from
the same source, due to crowding. Indeed, this may well be a
happenstance discovery, as the standard deviation for the r' mag may
have more to do with the crowded field and varying seeing at the times
of observation than actual detection of the object at different
magnitudes.  Nevertheless, it can be seen to vary.

The object has no B1 colour quoted, but examination of it on the
contemporaneous POSS I blue and red plates shows it to be far brighter
on the red.  The object is by far brightest on the far red plate.  It is
also quite bright in 2MASS.


IDENTIFICATIONS

USNO B1.0 0899-044455

2MASS 1905403-000155

The following are probably the same object, given the colour, but
crowded fields can be problematic and these catalogues are not known for
great positional accuracy

MSX5C_G034.5289-03.1811

IRAS 19030-0006

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John Greaves

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