ORCID Profile
0000-0002-7663-0960
Current Organisation
University of Manchester
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Publisher: American Astronomical Society
Date: 09-11-2018
Publisher: Springer Science and Business Media LLC
Date: 19-05-2012
Publisher: American Astronomical Society
Date: 04-2023
DOI: 10.3847/PSJ/ACC463
Abstract: The Kuiper Belt objects (KBOs), the Centaurs, and the Jupiter-family comets (JFCs) form an evolutionary continuum of small outer solar system objects, and their study allows us to gain insight into the history and evolution of the solar system. Broadband photometry can be used to measure their phase curves, allowing a first-order probe into the surface properties of these objects, though limited telescope time makes measuring accurate phase curves difficult. We make use of serendipitous broadband photometry from the long-baseline, high-cadence Asteroid Terrestrial-impact Last Alert System survey to measure the phase curves for a s le of 18 KBOs, Centaurs, and JFCs with unprecedentedly large data sets. We find phase curves with previously reported negative slopes become positive with increased data and are thus due to insufficient s ling of the phase-curve profile, and not a real physical effect. We search for correlations between phase-curve parameters, finding no strong correlations between any parameter pair, consistent with the findings of previous studies. We search for instances of cometary activity in our s le, finding a previously reported outburst by Echeclus and a new epoch of increased activity by Chiron. Applying the main belt asteroid HG 1 G 2 phase-curve model to three JFCs in our s le with large phase angle spans, we find their slope parameters imply surfaces more consistent with those of carbonaceous main belt asteroids than silicaceous ones.
Publisher: Springer Science and Business Media LLC
Date: 26-05-2018
Publisher: Elsevier BV
Date: 12-2013
Publisher: American Astronomical Society
Date: 05-11-2018
Publisher: Elsevier BV
Date: 09-2015
Publisher: Elsevier BV
Date: 06-2011
Publisher: American Astronomical Society
Date: 17-09-2021
Abstract: Asteroid Terrestrial-impact Last Alert System (ATLAS) observations of Centaur (2060) 95P/Chiron show a brightening in the apparent magnitude not due rotational light curves or phase effects. This onset or enhancement of cometary activity started after 2021 February 8 UT and continued in later observations from 2021 June 18 UT onward. Recent ATLAS observations and deeper follow-up imaging obtained using the Las Cumbres Observatory 1.0 m robotic telescope network find no confirmed signature of coma or tail-like features.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Javed Siddiqui.