Gas and dust activity evolution of 12P. Top: production rates obtained from TRAPPIST and MISTRAL, and by Ferellec et al. (2024) and Li et al. (2025). Downward arrows represent upper limits, where the threshold is determined by the measurement uncertainty (see Section 2). Bottom: A(θ)fρ with the Rc filter measured in a 10000 km aperture. Upward arrows indicate a lower limit due to saturated images. Both are logarithmic scales to better show the outbursts.