The Rosetta probe's photographs confirmed the results of a 2003 lightcurve analysis that described Lutetia as a rough sphere with "sharp and irregular shape features".
A study from 2004–2009 proposed that Lutetia has a non-convex shape, likely because of a large crater, Suspicio Crater.
It is not yet clear whether Rosetta's findings support this claim.

The analysis of Rosetta images in combination with photometric light curves yielded the position of the north rotational pole of Lutetia: RA = 51.8°±0.4°, Dec = +10.8°±0.4°.
This gives an axial tilt of 96° (retrograde rotator), meaning that the axis of rotation is approximately parallel to the ecliptic, similar to the planet Uranus.
The Rosetta probe's photographs confirmed the results of a 2003 lightcurve analysis that described Lutetia as a rough sphere with "sharp and irregular shape features". A study from 2004–2009 proposed that Lutetia has a non-convex shape, likely because of a large crater, Suspicio Crater. It is not yet clear whether Rosetta's findings support this claim.
The analysis of Rosetta images in combination with photometric light curves yielded the position of the north rotational pole of Lutetia: RA = 51.8°±0.4°, Dec = +10.8°±0.4°. This gives an axial tilt of 96° (retrograde rotator), meaning that the axis of rotation is approximately parallel to the ecliptic, similar to the planet Uranus.
21 Lutetia