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was hoping someone could help me to answer a question:

an ateroid has an equilibrium temperature measured as 200 K. What is the object's orbital period around the Sun?

That is the exact wording of that particular question and that's why I am a little stumped.. it also says to base it upon your considerations in question #4, which reads

assuming the Earth's radius is 637 km, the solar constant is 1370 w/m2, and our planetary albedo is 0.31, then:

(a) determine total power entering Earth's atmosphere

(b) the total power that would be asborbed in the absence of an atmosphere

© surface temperature assuming it radiated into space all the energy it absorbed

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# Temperature and orbital period

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