R Doradus

Common card · No. 467190

R Doradus (HD 29712 or P Doradus) is a red giant variable star in the far-southern constellation Dorado, close to the border with Reticulum. Its distance from Earth is 178 light-years (55 parsecs). Having a uniform disk diameter of 57±5 mas, it is thought to be the extrasolar star with the largest apparent size as viewed from Earth.

Read on Wikipedia · Image ALMA (ESO/NAOJ/NRAO)/W. Vlemmings et al., CC BY 4.0