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According to adaptive-optics observations by Ferrais et al., (22) Kalliope isa 150-km, dense and differentiated body. Here, we interpret (22) Kalliope inthe context of bodies in its surroundings. While there is a known moon Linus,with a 5:1 size ratio, no family has been reported in the literature, which isin contradiction with the existence of the moon. Using the hierarchicalclustering method (HCM) along with physical data, we identified the Kalliopefamily. Previously, it was associated to (7481) San Marcello. We then usedvarious models (N-body, Monte-Carlo, SPH) of its orbital and collisionalevolution, including the break-up of the parent body, to estimate the dynamicalage of the family and address its link to Linus. The best-fit age is (900+-100)My according to our collisional model, in agreement with the position of (22)Kalliope, which was modified by chaotic diffusion due to 4-1-1 three-bodyresonance with Jupiter and Saturn. It seems possible to create Linus and theKalliope family at the same time, although our SPH simulations show a varietyof outcomes, for both satellite size and the family size-frequencydistribution. The shape of (22) Kalliope itself was most likely affected bygravitational reaccumulation of `streams', which creates characteristic hillsobserved on the surface. If the body was differentiated, its internal structureis surely asymmetric.

Discovery of an asteroid family linked to (22) Kalliope and its moon Linus