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Multiyear Ground-based Survey Photometry of Active Comet 103P/Hartley 2 and Centaur (2060) Chiron: A Tale of Two Comets in the Pre-LSST Era

Authors: Joseph Murtagh, Megan E. Schwamb, Michael S. P. Kelley, Matthew M. Knight, Thomas Lehmann, Giannantonio Milani, A. Fraser Gillan, Alan Fitzsimmons, Ryan R. Lyttle, Matthew M. Dobson, Carrie E. Holt, Tim Lister, Joseph P. Chatelain, Sarah Greenstreet, Quanzhi Ye, 泉志叶, Henry H. Hsieh, Denis Bodewits, Tracy X. Chen, Richard G. Dekany, Matthew J. Graham, Steven L. Groom, George Helou, Mansi M. Kasliwal, Ashish A. Mahabal, Reed Riddle

Joseph Murtagh et al 2026 The Planetary Science Journal 7 .

Provider: AAS Journals

Caption: Figure 3.

Distance- and phase-corrected light curves for 103P/Hartley 2 color-shifted to (top) ZTF-r band and (bottom) to ZTF-g band. Note that no phase correction is applied to the g band (see Section 3). The different datasets are denoted via differing colors and markers. The solid black curve running over each dataset is a third-order polynomial spline fit. Overplotted in a solid navy line in both plots is the date of perihelion passage, 2023 October 12, for reference.

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