Physical Characterization of Active Asteroid (6478) Gault

@article{Sanchez2019PhysicalCO,
  title={Physical Characterization of Active Asteroid (6478) Gault},
  author={Juan A. Sanchez and Vishnu Reddy and Audrey Thirouin and Edward L. Wright and Tyler R. Linder and Theodore Kareta and Benjamin Sharkey},
  journal={The Astrophysical Journal},
  year={2019}
}
Main belt asteroid (6478) Gault has been dynamically linked with two overlapping asteroid families: Phocaea, dominated by S-type asteroids, and Tamara, dominated by low-albedo C-types. This object has recently become an interesting case for study, after images obtained in late 2018 revealed that it was active and displaying a comet-like tail. Previous authors have proposed that the most likely scenarios to explain the observed activity on Gault were rotational excitation or merger of near… Expand

Figures from this paper

(6478) Gault: physical characterization of an active main-belt asteroid
In December 2018, the main-belt asteroid (6478) Gault was reported to display activity. Gault is an asteroid belonging to the Phocaea dynamical family and was not previously known to be active, norExpand
A study of the physical properties of an active asteroid (6478 Gault)
In 2019 January, the appearance of asteroid 6478 Gault immediately attracted attention because this object exhibited a long and thin tail that was quite different from the usual asteroids. ThisExpand
Active Asteroid (6478) Gault: A Blue Q-type Surface below the Dust?
We present near-infrared spectroscopy of the sporadically active asteroid (6478) Gault collected on the 3 m NASA/Infrared Telescope Facility observatory in late 2019 March/early April. Long-exposureExpand
Spinning and colour properties of the active asteroid (6478) Gault
We report on accurate $BVR_{c}$ observations of (6478) Gault, a 5-6 km diameter inner main-belt asteroid in the Phocaea family, notable for its sporadic, comet-like ejection of dust. This curiousExpand
Activity of (6478) Gault during 2019 January 13–March 28
We present the results of photometric observations of active asteroid (6478) Gault performed at heliocentric distances from 2.46 to 2.30 au and geocentric distances from 1.79 to 1.42 au betweenExpand
Lucy Mission to the Trojan Asteroids: Science Goals
The Lucy Mission is a NASA Discovery-class mission to send a highly capable and robust spacecraft to investigate seven primitive bodies near both the L4 and L5 Lagrange points with Jupiter: theExpand
Expanding the Y Dwarf Census with Spitzer Follow-up of the Coldest CatWISE Solar Neighborhood Discoveries
We present Spitzer 3.6$\mu$m and 4.5$\mu$m follow-up of 170 candidate extremely cool brown dwarfs newly discovered via the combination of WISE and NEOWISE imaging at 3$-$5$\mu$m. CatWISE, a jointExpand
Rotational Mass Shedding from Asteroid (6478) Gault
The ∼4 km diameter main belt asteroid 6478 Gault has ejected dust intermittently since at least 2013. The character of the emission, including its episodic nature and the low speed of the ejectedExpand
Time-series and Phase-curve Photometry of the Episodically Active Asteroid (6478) Gault in a Quiescent State Using APO, GROWTH, P200, and ZTF
We observed the episodically active asteroid (6478) Gault in 2020 with multiple telescopes in Asia and North America and found that it is no longer active after its recent outbursts at the end ofExpand

References

SHOWING 1-10 OF 30 REFERENCES
Dust properties of double-tailed active asteroid (6478) Gault
Context. Asteroid (6478) Gault was discovered to exhibit a comet-like tail in observations from December 2018, becoming a new member of the so-called active asteroid population in the main asteroidExpand
A dark asteroid family in the Phocaea region
We report the discovery of a new asteroid family among the dark asteroids residing in the Phocaea region the Tamara family. We make use of available physical data to separate asteroids in the regionExpand
Multiple Outbursts of Asteroid (6478) Gault
Main-belt asteroid (6478) Gault unexpectedly sprouted two tails in late 2018 and early 2019, identifying it as a new active asteroid. Here we present observations obtained by the 1.2-m ZwickyExpand
Episodically Active Asteroid 6478 Gault
We present imaging and spectroscopic observations of 6478 Gault, a 6 km diameter inner main-belt asteroid currently exhibiting strong, comet-like characteristics. Three distinct tails indicate thatExpand
Surface Composition of (99942) Apophis
On April 13, 2029, near-Earth asteroid (NEA) (99942) Apophis will pass at a distance of 6 Earth radii from Earth. This event will provide researchers with a unique opportunity to study the effects ofExpand
Phase reddening on near-Earth asteroids: Implications for mineralogical analysis, space weathering and taxonomic classification
Abstract Phase reddening is an effect that produces an increase of the spectral slope and variations in the strength of the absorption bands as the phase angle increases. In order to understand itsExpand
Rotationally resolved spectroscopy of asteroid pairs: No spectral variation suggests fission is followed by settling of dust
Abstract The fission of an asteroid due to fast rotation can expose sub-surface material that was never previously exposed to any space weathering process. We examine the spectral properties ofExpand
Composition of Potentially Hazardous Asteroid (214869) 2007 PA8: An H Chondrite from the Outer Asteroid Belt
Potentially hazardous asteroids (PHAs) represent a unique opportunity for physical characterization during their close approaches to Earth. The proximity of these asteroids makes them accessible forExpand
Main Belt Asteroids with WISE/NEOWISE: Near-Infrared Albedos
We present revised near-infrared albedo fits of 2835 Main Belt asteroids observed by WISE/NEOWISE over the course of its fully cryogenic survey in 2010. These fits are derived from reflected-lightExpand
The Sporadic Activity of (6478) Gault: A YORP-driven Event?
On 2019 January 5 a streamer associated with the 4--10 km main-belt asteroid (6478)~Gault was detected by the ATLAS sky survey, a rare discovery of activity around a main-belt asteroid. Archival dataExpand
...
1
2
3
...