Rosetta passed the asteroid Lutetia at a distance of approximately 3000 kilometres on 10 July 2010.

Rosetta passed the asteroid Lutetia at a distance of approximately 3000 kilometres
Rosetta passed the asteroid Lutetia at a distance of approximately 3000 kilometres on 10 July 2010.
Lutetia is an asteroid with a comparably big mass due to a high iron content.
Credit:

ESA 2010 MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA.