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Multi-year Ground-Based Survey Photometry of Active Comet 103P/Hartley 2 and Centaur (2060) Chiron: A Tale of Two Comets in the Pre-LSST Era
Joseph Murtagh, Megan E. Schwamb, Michael S. P. Kelley +22
Comets and Centaurs trace the evolution of trans-Neptunian objects (TNOs) into the inner solar system. Their activity reflects the interplay between volatile sublimation, dust dyna…
Prediscovery Activity of New Interstellar Object 3I/ATLAS: A Dynamically-Old Comet?
Quanzhi Ye, Michael S. P. Kelley, Henry H. Hsieh +9
We report on the prediscovery observations and constraints of the new interstellar comet 3I/2025 N1 (ATLAS), made by the Zwicky Transient Facility (ZTF), for the inbound leg of the…
Multiple Outbursts of Asteroid (6478) Gault
Quanzhi Ye, Michael S. P. Kelley, Dennis Bodewits +12
Main-belt asteroid (6478) Gault unexpectedly sprouted two tails in late 2018 and early 2019, identifying it as a new active asteroid. Here we present observations obtained by the 1…