A comet is a highly dynamic object, undergoing a permanent state of change. These
changes have to be carefully classified and considered according to their intrinsic temporal …

Comets are made of volatile and refractory material and naturally experience various
degrees of sublimation as they orbit around the Sun. This gas release, accompanied by …

Aims. We present the most extensive catalog of exposures of volatiles on the
67P/Churyumov-Gerasimenko nucleus generated from observations acquired with the …

Ejection of large boulder-like debris is a vigorous form of cometary activity that is unlikely
induced by water ice out-gassing alone but rather associated with the sublimation of super …

Abstract Comet C/2017 K2 (PANSTARRS) was discovered by the Pan-STARRS1 (PS1)
Survey on 2017 May 21 at a distance of 16.09 au from the Sun, the second most distant …

Context. The NASA mission OSIRIS-REx (Origins, Spectral Interpretation, Resource
Identification, and Security–Regolith Explorer) has been observing near-Earth asteroid …

ABSTRACT Between 2014 December 31 and 2015 March 17, the OSIRIS cameras on
Rosetta documented the growth of a wide and deep depression in the Hapi region on Comet …

We here study the level of albedo variegation on the nucleus of Comet 67P/Churyumov–
Gerasimenko. This is done by fitting the parameters of a standard photometric phase …

The previously defined regions on the nucleus of comet 67P/Churyumov-Gerasimenko have
been mapped back onto the 3D SHAP7 model of the nucleus (Preusker et al., 2017). The …

We have used the latest available shape model for gas and dust simulations of the inner
coma of comet 67P/Churyumov-Gerasimenko for the period around May 2015 (equinox). We …