Johnson's Comet, formally designated as C/1935 A1, is a long-period comet with a 900-year orbit around the Sun. It is the first of four comets discovered by South African astronomer, Ernest Leonard Johnson.
Orbit Between February and March 1936, Allan D. Maxwell calculated that the comet had an orbital period of 750 years, later revised to 896 years. This is a follow-up to the preliminary parabolic solutions that were first calculated by J. P. Möller and H. Q. Rassumen a year prior.
References
External links C/1935 A1 at the JPL Small-Body Database