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An approximately spherical, black asteroid (emissivity equal to one) of diameter 2km is orbiting the sun...

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Physics

An approximately spherical, black asteroid (emissivity equal toone) of diameter 2km is orbiting the sun at a distance from the sun10 times larger than the distance from the sum to the earth

a) What is the tempature of this asteroid?

b) What is the wavelength of radiation it emits with maximumintersity?

c) What rediation intersity emitted by the asteroid would beobserved on Earth (when the asteroid makes its closet approach,assuming a circular orbit)?

Solar constant (solar power per unit area measured above theearth's atmosphere is 1400 W/m^2).

Distance from the Sun to the Earth is 1.5*10^11m

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