Tags: Star.
RR Caeli is a double star in the constellation Caelum. It is approximately 66 light years from Earth. It was first noted to be a high-proper motion star in 1955 by Jacob Luyten and given the name LFT 349. Discovered to be an eclipsing binary in 1979 it has a baseline magnitude of 14.36 dimming markedly every 7.2 hours for an interval of around 10 minutes due to the total eclipse of the brighter star by the fainter one.