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Establishing Earth's Minimoon Population through Characterization of Asteroid 2020 CD
Grigori Fedorets, Marco Micheli, Robert Jedicke +20
We report on our detailed characterization of Earth's second known temporary natural satellite, or minimoon, asteroid 2020 CD3. An artificial origin can be ruled out based on its a…
GJ 3470 c: A Saturn-like Exoplanet Candidate in the Habitable Zone of GJ 3470
Phillip Scott, Bradley Walter, Quanzhi Ye +12
We report the discovery of a new exoplanet candidate orbiting the star GJ 3470. A total of three transits were detected by OKSky Observatory: the first one on December 23, 2019, th…
Recurring Outbursts of P/2019 LM (Palomar)
Quanzhi Ye, Michael S. Kelley, Dennis Bodewits +4
We present a preliminary analysis of comet P/2019 LM (Palomar) as observed by the Zwicky Transient Facility (ZTF) survey in 2019 and 2020. We find that the discovery of the com…
Observations of Disintegrating Long-Period Comet C/2019 Y4 (ATLAS) -- A Sibling of C/1844 Y1 (Great Comet)
Man-To Hui, Quan-Zhi Ye
We present a study of C/2019 Y4 (ATLAS) using Sloan observations from mid-January to early April 2020. During this timespan, the comet brightened with a growth in the effecti…
Physical Characterisation of Interstellar Comet 2I/2019 Q4 (Borisov)
Man-To Hui, Quan-Zhi Ye, Dora Föhring +2
We present a study of interstellar comet 2I/2019 Q4 (Borisov) using both preperihelion and postperihelion observations spanning late September 2019 through late January 2020. The i…
Supercatastrophic disruption of asteroids in the context of SOHO comet, fireball and meteor observations
Paul Wiegert, Peter Brown, Petr Pokorný +5
Granvik et al. (2016) report an absence of asteroids on orbits with perihelia near the Sun that they attribute to the 'supercatastrophic disruption' of these bodies. Here we invest…