Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Comet Daniel is a periodic comet in the solar system discovered by Zaccheus Daniel on December 7, 1909 estimated as magnitude 9. Following its discovery, the returns for 1916, 1923, and 1930 were predicted but on each occasion it was not recovered. The 1937 return was recovered by Shin-ichi Shimizu on January 31 after a calculation of the comet's orbit by Hidewo Hirose after he took calculations for the 1923 return done by Alexander D. Dubiago and took into account perturbations from Jupiter.