RV Tauri variable

RV Tauri variables are also often considered to lie on the instability strip near the Cepheids.

RV Tauri variables are luminous variable stars that have distinctive light variations with alternating deep and shallow minima.

It is a yellow supergiant and is a pulsating variable known as a RV Tauri variable.

The stellar population includes four Cepheids and RV Tauri variables, plus at least one RR Lyrae variable for which a period is known.

Further types of variable stars, such as RV Tauri variables and PV Telescopii variables, are often described as supergiants.

In the Population II stars this irregularity gradually increases from the low period W Virginis variables through the RV Tauri variables into the regime of the semiregular variables.

The AAVSO LPV Section covers the Mira, SR, and L stars, but also RV Tauri variables, another type of large cool slowly varying star.

In addition, there are much rarer yellow supergiant variables such as RV Tauri variables, thought to be post-AGB stars, and R Coronae Borealis, highly unusual carbon-rich stars with almost no hydrogen.