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astr301w20_hw5.pdf - Homework #5 – ASTR 301 Complete the...

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(over)Homework #5 – ASTR 301Complete the following problems on a separate sheet of paper. You must showallyour work toreceive full credit. Please be sure your answers are all clearly indicated. Qualitative questionsshould be answered using complete sentences in legible handwriting. (Total possible = 65 pts)1.(6pts) The mean albedo of Mars is 0.16. Assuming an emissivity ofe= 1.0, what is thesubsolar blackbody temperature of Mars…a.at perihelion?b.at aphelion?2.(5pts) During the day, Mercury has a surface temperature of 700 K; at nighttime, itstemperature is 100 K. At what wavelength would Mercury’s thermal emission peak onthe dayside? On the nightside?3.(3pts) Ceres has an IR flux that is 4 times its visible flux. What is the albedo of Ceres?4.(5pts) The crushing strength (pressure for material deformation) for iron meteorites isabout 4x108Pa. At what size would an iron asteroid have this central pressure? Assumeconstant density of 7500 kg/m3.

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Term
Fall
Professor
Keller
Tags
Solar System, Planet, IDA, Black body

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