Abstract
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.
Highlights
ATLAS DETECTION OF CHIRON BRIGHTENING The Asteroid Terrestrial-impact Last Alert System (ATLAS) wide-field survey (Tonry et al 2018a) uses two 0.5-m Schmidt telescopes located in Hawai’i to search for near-Earth asteroids down to a limiting magnitude of ∼19.7 in two wide-band filters - cyan (‘c’, of wavelength range 420-650 nm) and orange (‘o’, of wavelength range 560-820 nm)
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
In Astronomer’s Telegram Dobson et al (2021), we report an initial brightening indicative of new or increasing activity. In this Research Note, we present the two filter ATLAS phase curves, the follow-up imaging, and further interpretation of our results
Summary
ATLAS DETECTION OF CHIRON BRIGHTENING The Asteroid Terrestrial-impact Last Alert System (ATLAS) wide-field survey (Tonry et al 2018a) uses two 0.5-m Schmidt telescopes located in Hawai’i to search for near-Earth asteroids down to a limiting magnitude of ∼19.7 in two wide-band filters - cyan (‘c’, of wavelength range 420-650 nm) and orange (‘o’, of wavelength range 560-820 nm). 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.
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