Repeating Gas Ejection Events from Comet 45P/Honda–Mrkos–Pajdušáková
Alessondra Springmann et al 2022 Planet. Sci. J. 3 15
Observations of a comet on its closest approach to Earth in 2017 reveal gas and dust structures, changes in the jet direction for different chemical species, and a feature that repeats every 7.6 hours.