Physical Characteristics
On the basis of its absolute magnitude in the visible light spectrum and supposed albedo (which usually varies from 0.05 to 0.25 for the main belt asteroids) the diameter of the asteroid 30564 Olomouc can be estimated from 2.6 to 5.9 km. Since astronomers do not have the spectral data on the asteroid, neither its chemical nor mineralogical composition is known.
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—Erich Fromm (1900–1980)