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APO Time Resolved Color Photometry of Highly-Elongated Interstellar Object 1I/'Oumuamua
Bryce T. Bolin, Harold A. Weaver, Yanga R. Fernandez +9
We report on , and band observations of the Interstellar Object 'Oumuamua (1I) taken on 2017 October 29 from 04:28 to 08:40 UTC by the Apache Point Observatory (APO) 3.5…
Infrared Spectroscopy of HR 4796A's Bright Outer Cometary Ring + Tenuous Inner Hot Dust Cloud
Carey M. Lisse, Mike L. Sitko, Massimo Marengo +4
We have obtained new NASA IRTF SpeX spectra of the HR 4796A debris ring system. We find a unique red excess flux that extends out to ~9 um in Spitzer IRS spectra, where thermal emi…
Rotation of Cometary Nuclei: New Lightcurves and an Update of the Ensemble Properties of Jupiter-Family Comets
R. Kokotanekova, C. Snodgrass, P. Lacerda +6
We report new lightcurves and phase functions for nine Jupiter-family comets (JFCs). They were observed in the period 2004-2015 with various ground telescopes as part of the Survey…