ASIA CO : Asiago Spectroscopy and Imaging Atlas of COmets A decade of cometary science at the Asiago Astrophysical Observatory

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ID: 328016
2026
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Abstract
Abstract The ASIACO project is a long-term spectroscopic and imaging Atlas of comets observed at the Asiago Astrophysical Observatory from 2013 to 2026 and is still ongoing. The dataset includes 47 comets from all dynamical classes - 63.8 per cent long-period (LPCs), 34.0 per cent short-period (SPCs), and one interstellar object - monitored with the DFA-Unipd 1.22 m Galileo telescope for low-to-medium resolution spectroscopy and the INAF-OAPd 1.82 m Copernico and 0.67/0.92 m Schmidt telescopes for broad-band imaging. A total of 718 spectra have been acquired, covering heliocentric distances from 0.720 to 6.855 AU. The Atlas is organised as a collection of individual comet sheets, each providing orbital elements, ephemerides, representative images, and a full spectroscopic observation log. The reduced one-dimensional spectra are publicly available in plain text format, while FITS files and the raw two-dimensional frames are available upon request. The dataset enables a broad range of scientific applications, including molecular production rate determination, taxonomic classification, inner coma morphology studies, spin axis orientation, and dust production rate estimates. CN is the most frequently detected molecular species in both SPCs and LPCs, while C3, C2, and NH2 show lower detection fractions and a stronger dependence on heliocentric distance. The project remains active and the Atlas is continuously updated as new comets are observed.
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Authors A. Farina, A C Mura, P Ochner, F Manzini, V Oldani, I Albanese, V Andreoli, L Fiaccadori, M Lazzarin, F La Forgia, G Mocellin, A Reguitti
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Journal RAS Techniques and Instruments
Year 2026
DOI
10.1093/rasti/rzag066
URL
https://doi.org/10.1093/rasti/rzag066
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