[vsnet-chat 487] Masi's variable near M27

[bas@lowell.Lowell.Edu (Brian Skiff)]

     Gianluca Masi's variable star is in the USNO A1.0 catalogue at
position:  19 59 41.9  +22 33 50 (2000).  The magnitudes reported from
the POSS-I plates are mb = 17.2, mr = 13.7.  The nominal blue minus red
color index of 3.5 suggests the star is a red semiregular or Mira-type
variable.  The variations probably have a timescale of some months.
     Observations at about one-week intervals through the observing
season will be sufficient to characterize the variability.  Try to use
a photometric filter in the observations if you can (such as Cousins R).
     By the way, the star is not in the IRAS catalogue or the GCVS4/NSV.
Gianluca's images on his Web page have south up and west to the left.

\Brian

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