The star Beta Canis Majoris. It is a B1 giant of magnitude 2.0, and a variable of Beta Cephei type, changing by less than 0.1 mag. in a period of 6 hours. It lies 493 l.y. away.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。