The star Gamma Virginis. It is a binary, consisting of a pair of F-type dwarfs each of magnitude 3.5, which orbit each other in a period of 169 years. Together they appear to the naked eye as a star of magnitude 2.7. Porrima lies 38 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。