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20 papers · 2 filters
Recurring Activity Discovered on Quasi-Hilda 2009 DQ118
William J. Oldroyd, Colin Orion Chandler, Chadwick A. Trujillo +10
We have discovered two epochs of activity on quasi-Hilda 2009 DQ118. Small bodies that display comet-like activity, such as active asteroids and active quasi-Hildas, are important…
JWST near-infrared spectroscopy of the Lucy Jupiter Trojan flyby targets: Evidence for OH absorption, aliphatic organics, and CO
Ian Wong, Michael E. Brown, Joshua P. Emery +6
We present observations obtained with the Near Infrared Spectrograph on JWST of the five Jupiter Trojans that will be visited by the Lucy spacecraft -- the Patroclus-Menoetius bina…
Material Around the Centaur (2060) Chiron from the 2018 November 28 UT Stellar Occultation
Amanda A. Sickafoose, Stephen E. Levine, Amanda S. Bosh +5
A stellar occultation of Gaia DR3 2646598228351156352 by the Centaur (2060) Chiron was observed from the South African Astronomical Observatory on 2018 November 28 UT. Here we pres…
Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks
Theodore Kareta, Cristina Thomas, Jian-Yang Li +85
The impact of the DART spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos' orbit substantially, largely from the ejection of material. We present results fr…
Scaling slowly rotating asteroids by stellar occultations
A. Marciniak, J. Ďurech, A. Choukroun +176
As evidenced by recent survey results, majority of asteroids are slow rotators (P>12 h), but lack spin and shape models due to selection bias. This bias is skewing our overall unde…
Laboratory Measurement of Volatile Ice Vapor Pressures with a Quartz Crystal Microbalance
W. M. Grundy, S. C. Tegler, J. K. Steckloff +12
Nitrogen, carbon monoxide, and methane are key materials in the far outer Solar System where their high volatility enables them to sublimate, potentially driving activity at very l…