Assertion: asteroid's value | /r/CapableOf | express as decimal fraction
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text: It does so about once every 3 years on average, spending up to 9 weeks above magnitude +6.0 before fading out of view.2 Even though it is only the third largest asteroid (after 1 Ceres and 2 Pallas ) it appears brighter in the night sky because of its closer approach distance to the Earth and its unusually light-coloured surface, which reflects a relatively high proportion of sunlight ( Vesta reflects 42% of the incoming sunlight, a value which, when expressed as a decimal fraction, is known as the albedo ).3