266P/Christensen is a Encke-type comet with a 6.63-year orbit around the Sun. It will next come to perihelion in December 2026. It has been suggested as the possible source of the 1977 "Wow! Signal", however this was later disproven by a follow-up study in 2020, where it was found out to be likely a maser-like flare from small hydrogen clouds in interstellar space instead.
Physical characteristics Observations conducted by the Sloan Digital Sky Survey (SDSS) in 2012 revealed that the nucleus of 266P has an upper limit no greater than 1.66 km (1.03 mi) in radius.
References
External links 266P/Christensen at the JPL Small-Body Database 266P/Christensen at Seiichi Yoshida's website