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email: iris@uniparthenope.it

Prodotti recenti

The Agilkia boulders/pebbles size-frequency distributions: OSIRIS and ROLIS joint observations of 67P surface

By using the images acquired by the OSIRIS (Optical, Spectroscopic and Infrared Remote Imaging System) and ROLIS (ROsetta Lander Imaging System) cameras, we derive the size- frequency distribution (SFD) of cometary pebbles and boulders covering the size range 0.05- 30.0 m on the Ag...

Investigating the physical properties of outbursts on comet 67P/Churyumov-Gerasimenko

Cometary outbursts on several comets have been observed both by ground-based telescopes and by in situ instruments on spacecraft. However, the mechanism behind these phenomena and their physical properties are still unclear. The optical, spectrocopic and infrared remote imaging system (OSIRIS)&#x...

The global meter-level shape model of comet 67P/Churyumov-Gerasimenko

We performed a stereo-photogrammetric (SPG) analysis of more than 1500 Rosetta/OSIRIS NAC images of comet 67P/Churyumov-Gerasimenko (67P). The images with pixel scales in the range 0.2-3.0 m/pixel were acquired between August 2014 and February 2016. We finally derived a global high...

The highly active Anhur-Bes regions in the 67P/Churyumov- Gerasimenko comet: Results from OSIRIS/ROSETTA observations

The Southern hemisphere of the 67P/Churyumov-Gerasimenko comet has become visible from Rosetta only since 2015 March. It was illuminated during the perihelion passage and therefore it contains the regions that experienced the strongest heating and erosion rates, thus exposing the sub-surface...

Post-perihelion photometry of dust grains in the coma of 67P Churyumov-Gerasimenko

We present a photometric analysis of individual dust grains in the coma of comet 67P/Churyumov-Gerasimenko using OSIRIS images taken from 2015 July to 2016 January. We analysed a sample of 555 taken during 18 d at heliocentric distances ranging between 1.25 and 2.04 au an...

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