The name given by F. W. Herschel to Mu Cephei on account of its prominent red colour. It is an M2 supergiant and a semiregular variable of type SRC, ranging from magnitude 3.4 to 5.1 in a period of about 2 years.
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。