540 Rosamunde
Encyclopedia
540 Rosamunde is an S-type asteroid
S-type asteroid
S-type asteroids are of a stony composition, hence the name. Approximately 17% of asteroids are of this type, making it the second most common after the C-type.-Characteristics:...

http://www.psi.edu/pds/resource/taxonomy.html belonging to the Flora family
Flora family
The Flora family of asteroids is a large grouping of S-type asteroids in the inner main belt, whose origin and properties are relatively poorly understood at present...

 in the Main Belt. Its diameter is about 19 km and it has an albedo
Albedo
Albedo , or reflection coefficient, is the diffuse reflectivity or reflecting power of a surface. It is defined as the ratio of reflected radiation from the surface to incident radiation upon it...

of 0.243 http://www.psi.edu/pds/resource/imps.html. Its rotation period is 9.336 hourshttp://www.psi.edu/pds/archive/lc.html.
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