RY Puppis
Here we have a star which is thought to be invariable but may not be! The range given for RY Pup is 7.0 to 8.0, which seems rather large for a "constant" star. You may like to look at it once a month and see if you see any changes. Any more frequent observation will probably give rise to biased results.
Comparison Stars
A = 6.0
B = 6.8
C = 7.4
D = 7.8
E = 8.6
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