31P/Schwassmann–Wachmann, also known as Schwassmann–Wachmann 2, is a periodic comet in the Solar System. It was discovered on 17 January 1929, at an apparent magnitude of 11. The comet has been seen at every apparition. The comet nucleus is estimated to be 6.2 km (3.9 mi) in diameter. In 1929, the astronomer Anne Sewell Young identified the comet with an object that had been misidentified as the minor planet "Adelaide" (A904 EB).
References
External links 31P/Schwassmann–Wachmann at the JPL Small-Body Database 31P at Kazuo Kinoshita's Comets 31P/Schwassmann-Wachmann 2 – Seiichi Yoshida @ aerith.net