2007年IOAA观测第二部分第1题

英文题目

PART II: Use the provided binoculars (total 10 points)

2.1 The open star cluster “Hyades” in constellation Taurus is one of the nearest clusters to us, being only 151 light years away. From the provided chart with brightness of some stars indicated by the apparent magnitude in parentheses, please estimate the apparent magnitude of the star Gamma-Tauri (γ-Tauri) to the nearest first decimal digit. (5 points)