変光星総合カタログ
k Puppis is listed in the General Catalogue of Variable Stars as a suspected variable star, but the range and type are not stated. The "International Bulletin of Variable Stars" has since published research showing that k2 Puppis is the variable component. It is an SX Arietis variable with a period of 1.9093 days which is also the rotational period of the star. The total amplitude is 0.015 apparent magnitude.