RV Tauri
Sigurd Einbu (November 5, 1866 – May 10, 1946) (spelled "Enebue" at birth), was a Norwegian self-taught astronomer from Lesjaskog, known to have discovered a nova in the stellar constellation Gemini on March 12, 1912. The nova was named Nova Geminorum 2. Also in 1912 he introduced a new class of variable stars, the RV Tauri variable stars.