A particular star is 20 pc away from the Earth, and its luminosity is 160 times the luminosity of the Sun and has a surface temperature of 4000 K. Its absolute magnitude is -0.66. The temperature of the Sun is 5800 K. Explain/show your work. What is this star's parallax? What is this star's spectral class? What is the wavelength at which this star radiates the most energy?.