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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…
Estimates of Rotation Periods for Jupiter Trojans with the Zwicky Transient Facility Photometric Lightcurves
Zhuofu Li, Yasin A. Chowdhury, Željko Ivezić +12
We present new rotational period estimates for 216 Jupiter Trojans using photometric data from the Zwicky Transient Facility (ZTF), including 80 Trojans with previously unknown per…
In Search of the Potentially Hazardous Asteroids in the Taurid Resonant Swarm
Jasmine Li, Quanzhi Ye, Denis Vida +8
The Taurid Complex is a large interplanetary system that contains comet 2P/Encke, several meteoroid streams, and possibly a number of near-Earth asteroids. The size and nature of t…
Time-series and Phasecurve Photometry of Episodically-Active Asteroid (6478) Gault in a Quiescent State Using APO, GROWTH, P200 and ZTF
Josiah N. Purdum, Zhong-Yi Lin, Bryce T. Bolin +49
We observed Episodically Active Asteroid (6478) Gault in 2020 with multiple telescopes in Asia and North America and have found that it is no longer active after its recent outburs…
Initial Characterization of Active Transitioning Centaur, P/2019 LD2 (ATLAS), using Hubble, Spitzer, ZTF, Keck, APO and GROWTH Visible & Infrared Imaging and Spectroscopy
Bryce T. Bolin, Yanga R. Fernandez, Carey M. Lisse +43
We present visible and mid-infrared imagery and photometry of temporary Jovian co-orbital comet P/2019 LD taken with HST/WFC3, Spitzer/IRAC, the GROWTH telescope network, visib…