Physics and Star Wars
To estimate the effects of the second Death Star, Minton looks into its mass. According to estimated data from some students of Lehigh University, the steel mass needed for building one would be around 770 kilograms times the mass cubed in weight. This would give the Death Star of about ten to the power of nineteen kilograms in mass. Using this data, Minton produces equations that lead him to conclude the fragments would hit the moons surface so hard causing craters almost four times the size of the Chicxulub crater in Mexico. This impact would cause a planetary firestorm and vaporize all lifeforms on the moon.
4150 Starr
According to the space-based survey by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, "Starr" measures 6.6 and 6.9 kilometers in diameter and its surface has an albedo of 0.258 and 0.277, respectively, while the "Collaborative Asteroid Lightcurve Link" (CALL) assumes an albedo of 0.24 – derived from 8 Flora, the family's largest member and namesake – and calculates a diameter of 7.5 kilometers with an absolute magnitude of 12.8.