[vsnet-newvar 1685] CMC12 181901.6+023423 is a Mira Variable

[jg@jgws.freeisp.co.uk]

CMC12 181901.6+023423   -   Mira Variable

RA 18 19 01.6143 sd 0.023"  Dec +02 35 23.957 sd 0.049" (ICRS)

r'_CMT_ 14.757 sd 2.232 from 3 photometric observations

NOFS survey archive date details

Red  Plates : 1953.5264, 1954.4162, 1986.6543, 1993.4004, 1993.5318
Blue Plates : 1953.5264, 1954.4162, 1981.3320, 1988.5216, 1990.4162
IVN  Plates : 1990.3751, 1993.3621

Within a colour plate set marked variation of this object relative to
adjacent stars is readily evident, even in the case of comparing the two
'far red' IVN plates against themselves.

In the case of contemporaneous blue and red plates, the object is
distinctly brighter on the red plates. In the case of the
near-contemporaneous 1993 red and far red plates, the latter is the
brighter.  Also an IRAS source.

Amplitude of variation, time distribution of variation (including
changes on same colour plates relatively close in time) and redness of
object point towards a Mira variable.


IDENTIFICATIONS :

GSC-ACT 0436 2557  18 19 01.62  +02 34 23.8 (err 0.3")

USNOB1.0 18 19 01.61 err 0.04"  +02 34 24.0 err 0.11"

IRAS 18165+0233


[ Acknowledgements, references and methodology can be found at :-

http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-newvar/msg01683.html
]


John Greaves

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