Pre-flyby estimates of the precision of the mass determination of asteroid (21) Lutetia from Rosetta radio tracking

Details Pre-flyby estimates of the precision of the mass determination of asteroid (21) Lutetia from Rosetta radio tracking Pre-flyby estimates of the precision of the mass determination of asteroid (21) Lutetia from Rosetta radio tracking

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010a%26a...518l.156p&link_type=abstract

Astronomy and Astrophysics, Volume 518, id.L156

Astronomy and Astrophysics

Astrophysics

Minor Planets, Asteroids: General, Minor Planets, Asteroids: Individual: (21) Lutetia

Scientific paper

The Rosetta spacecraft will fly by its second target asteroid (21) Lutetia on 10 July 2010. Simulations based on the currently known size of Lutetia and assumptions on the bulk density show that tracking of two radio-carrier frequencies at X-band (8.4 GHz) and S-band (2.3 GHz) during the flyby will determine the mass at less than 1% accuracy. Derivation of the asteroid volume by camera observation will drive the uncertainty in derivation of the bulk density. Mass and bulk density provide valuable clues that might help resolve the difficulties in determining the taxonomic class of the asteroid.

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