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Jupiter-family Comets (JFCs) exhibit a wide range of activity levels andmass-loss over their orbits. We analyzed high-cadence observations of 42 activeJFCs with the wide-field Asteroid Terrestrial-impact Last Alert System (ATLAS)survey in 2020-2021. We measured dust production rates of the JFCs using theAf\rho parameter and its variation as a function of heliocentric distance.There is a tendency for our JFC sample to exhibit a maximum Af\rho afterperihelion, with 254P/McNaught and P/2020 WJ5 (Lemmon) having their maximumAf\rho over a year after perihelion. On average, the rate of change of activitypost-perihelion was shallower than that pre-perihelion. We also estimated themass maximum loss rate for 17 of the JFCs in our sample, finding 4P/Faye to bethe most active. We present a subset of comets whose measured Af\rho have beeninterpolated and extrapolated to a common distance of 2 au pre-perihelion andpost-perihelion. From these measurements we found no correlation of intrinsicactivity with current perihelion distance. For three of the JFCs in our sample,6P/d'Arrest, 156P/Russell-LINEAR and 254P/McNaught, there was no visible comabut a constant absolute magnitude which we attributed to a probable detectionof the nucleus. We derived upper limits for the nuclear radii of \leq 2.1 +/-0.3 km, \leq 2.0 +/- 0.2 km and \leq 4.0 +/- 0.8 km respectively. Finally, wefound that 4P/Faye, 108P/Ciffreo, 132P/Helin-Roman-Alu 2, 141P/Machholz 2, and398P/Boattini experienced outbursts between 2020 and 2022.

Dust production rates in Jupiter-family Comets: A two-year study with ATLAS photometry