2026-04-23T18:52:49Zivo://CDS.VizieR/J/A+A/705/A892026-01-12T00:24:08ZJ.A_AIVOA12P/Pons-Brooks magnitude and activityComet 12P/Pons-Brooks is a Halley-type comet known for its outbursting activity during its previous perihelia in 1883 and 1953. Its strong activity and favourable observing geometry gave a great opportunity to study this outburst-prone comet during its 2024 return with modern instruments. We aim to study the activity and composition of 12P/Pons-Brooks during its 2024 passage through long-slit spectroscopy and narrow- and broad-band photometry and imaging. The photometric survey contains over 130 nights of observation with TRAPPIST-North and -South from May 6, 2023 (rh=4.62au, inbound), to September 7, 2024 (rh=2.06au, outbound). We collected images with broad- band Johnson-Cousins filters (BVRcIc) and narrow-band HB filters (OH, CN, C2, C3, NH, and dust continuum). We obtained long-slit low-resolution spectra at the Observatoire de Haute Provence with the MISTRAL instrument on the night of March 23, 2024, at a heliocentric distance of 0.94au. The spectra were used to analyse the emissions from the different molecular bands. We detect nine strong outbursts, with an approximate two-week periodicity; OH production rate reaching values above 10^29^ molecules/s and A(0)f{rho} dust activity proxy above 10^5^cm. Dust images show the formation of a double-horned-shaped coma and the expansion of a dust shell in the days following the strongest outbursts. The gas-to-dust ratio behaviour during these events differs from other observations of outbursting comets closer to the Sun, while outbursts rather share similarities with the centaur comet 29P/Schwassmann-Wachmann's. The analysis of CN jets between 1.02 and 2.13au suggests a nucleus rotation period of either 29.45h or 58.90h and a gas ejection velocity of 1.03+/-0.09km/s. From the MISTRAL spectra, emission bands from C_2_, NH_2_, and CN were observed, as well as H_2_ O+ in the anti-sunward direction.solar-systemcometschemical-abundancesvisible-astronomyinterdisciplinary-astronomyobservational-astronomysolar-system-astronomyhttps://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/705/A89https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/705/A892026A&A...705A..89Vhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/705/A89Vander Donckt M.Jehin E.Aravind K.Adami C.Hmiddouch S.Manfroid J.,Ganesh S.Benkhaldoun Z.Delsanti A.CDS2026https://cds.unistra.fr/vizier-org/licences_vizier.htmlCDS support team <cds-question@unistra.fr>DatasetAstroObjectsastronomy