Definition of 三等星 (さんとうせい)
さんとうせい
                        三等星
さんとうせい
santousei
noun
•
                
third magnitude star(astronomy term)
Other readings:
                3等星【さんとうせい】
                Related Kanji
| 三 | three | 
| 等 | etc., and so forth, class (first), quality, equal, similar | 
| 星 | star, spot, dot, mark |