Dear group,

One of the most recognized pulsating variable stars is RR Lyrae. Discovered in 1901, it is used as a "standard candle" for studies involving globular clusters amongst others.

It fluctuates by almost a full magnitude every 13.60 hours. However, being a summertime object, it is impossible to pursue a light curve during one session. With some strategic planning, we can do something over two all-nighters:

http://www.perseus.gr/Astro-Photomet...R-20120824.htm

Anthony.