The light curve of Comet Kohoutek (also designated as C/1973 E1, 1973f, and 1973 XII) around the time of its 28 December 1973 perihelion, based on apparent magnitude observations collected by the COBS Comet Observation Database (data licensed under CC BY-NA-SA 4.0), https://www.cobs.si. Blue crosses indicate observations while the red line denotes the perihelion of the comet.
Own work
TheAustinMan