On page 438, what is the color of the smallest Red shift valued object in terms

Question

On page 438, what is the color of the smallest Red shift valued object in terms of wavelength, page 49.
NASA used artificial colors for the presentation to the general public, for example, a fifth-grader. The actual color-frequency is in the infrared that we cannot see with our eyes. The actual wavelength would be the apparent perceived wavelength*(X+50) where X is the number in your tigermail address.
What is the temperature of that object according to Wien’s law? (hint: one centimeter has 10 million nanometers)

The color of the smallest value is green which is 500 nanometers (picture below), (x=74)

http://en.wikipedia.org/wiki/Wien%27s_displacement_law

Explanation / Answer

wave length of the object = 500 nm According to weins law            T = constant                    = 2.897*10-3   temperature of that object according to Wien’s law             T = 2.897*10-3   / ( 500*10-9 m )                  = 5794 K   

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