[vsnet-newvar 1688] Unknown Mira Variable at 03 59 57.70 +57 38 14.1 (2000)

[jg@jgws.freeisp.co.uk]

Seiichi Yoshida informed me of four suspected large amplitude red
variables on DSS images, noted during his researches, that were worthy
of
further investigation.

A star at 03 59 57.70 +57 38 14.1 (2000) clearly shows very marked
variation on
three red plate images sourced via the USNOFS image and catalogue server
at
www.nofs.navy.mil/data/FchPix/ , marked variation is also seen on the
three
blue plates, indeed on one of these the star is actually fainter than a
very close blue mag ~18 neighbouring star that is either partially
obscured or in one case totally hidden by the variable star on the red
plates. Variation is also seen between the two far red plates.

Contemporaneous E (red) and O (blue) plates from the 1950s DSS1 survey
show the object to be very much brighter indeed on the red plate, and 
the object is bright on the far red IVN plates.

This star is most likely a Mira.

(Interestingly a "blue" luminous star, LS I +57 140, lies barely half an
arcmin distant south-following, which can be of similar brightness to
the variable when the latter is nearer maximum (probably near red mag
14), so should give an aesthetically pleasing contrast to the naked eye
at the telescope).

IDENTIFICATIONS :

USNOB1.0 1476-0155161

RA 2000  03h59m57.73s error   81  mas
DEC2000 +57d38'14.3"  error  106  mas

GSC2.2 N312233258237

RA 2000  03h59m57.70s error  0.282860"
DEC2000 +57d38'14.1"  error  0.297817"



John Greaves

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