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Comets: Characterization of Cometary Nuclei

Wednesday, June 21, 2023, 8:30 AM
HCCC Doyle/Rees

Matthew Knight
Rosita Kokotanekova

Observations of cometary nuclei

8:30 AM
Kokotanekova R.* Bannister M. El-Maarry R. Fornasier S. Guilbert-Lepoutre A. et al.
The Life Cycle of Comets: Observational Evidence from Comets and Related Populations [#2321]
We will discuss the observational evidence for the evolution JFCs. We will present findings on the correlations of albedo and phase coefficient, surface color with perihelion distance, and rotational properties of JFCs compared to other populations.
8:42 AM
Esteves Lopez N.* Guilbert-Lepoutre A. Desmedt A. Adamietz F. Aupetit C. et al.
Clathrates Hydrates FTIR and Raman Spectroscopy to Understand Cometary Ices [#2208]
Characterisation of FTIR and Raman spectroscopic signatures of water-gas mixtures deposited under cometary conditions, i.e., 10 < T < 200 K and P ~ 10–7 mbar. Study of different experimental parameters that can influence the formation of gas hydrates.
8:54 AM
Fornasier S.* Hoang V. Fulle M. Quirico E. Ciarniello M.
Volatile Exposures on the 67P/Churyumov-Gerasimenko Nucleus [#2090]
We present the most extensive catalog of volatile exposures on comet 67P, built by analyzing the data of the OSIRIS cameras onboard Rosetta. We present the properties, size, duration, and spectral slope evolution of the 603 ice exposures identified.
9:06 AM
Besse S.* Guilbert-Lepoutre A. Benseguane S. Martinien L.
Morphological Changes on Comet 67P/Churyumov-Gerasimenko Linked to Seasonal Activity [#2044]
Using the thermal evolution model to assess the resulting erosion of comet 67p, we report that erosion profiles and trends match perfectly observations of the ESA Rosetta mission. We postulate that changes in comets are linked to seasonal activity.
9:18 AM
El-Maarry M. R.* Marschall R. Pajola M.
Investigating the Origin of Large and Giant Boulders on Comet 67P/Churyumov-Gerasimenko [#2393]
Comet 67P has giant boulders / Might have formed by outbursts / We test this hypothesis.
9:30 AM
Robinson J. E.* Malamud U. Opitom C. Perets H. B. Blum J.
Exploring the Relationship Between the Composition and Size of Cometary Nuclei [#2397]
Models of comet nuclei thermal conductivity and (size-dependent) radiogenic heating predict potential thermal alteration of their primordial composition and structure. To test this we assess possible relationships between comet composition and size.
9:42 AM
Donaldson A.* Snodgrass C. Kokotanekova R. Rożek A.
Comet Nucleus Lightcurves in the Era of LSST [#2418]
We present results from simulated LSST observations of inactive short period comet nuclei.
9:54 AM
Hsieh H. H.* Micheli M. Kelley M. S. P. Knight M. M. Moskovitz N. A. et al.
Observational Characterization of Nine Main-Belt Comet and Candidate Main-Belt Comet Nuclei [#2165]
We report results from observations to characterize the inactive nuclei of a sample of main-belt comets (MBCs) and MBC candidates, where we find what appears to be a strong physical preference toward small MBCs (Hsieh et al. 2023, PSJ, 4, 43).
10:06 AM
Break (30 minutes)


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