Hydrus in Chinese astronomy
The modern constellation Hydrus is not included in the Three Enclosures and Twenty-Eight Mansions system of traditional Chinese uranography because its stars are too far south for observers in China to know about them prior to the introduction of Western star charts. Based on the work of Xu Guangqi and the German Jesuit missionary Johann Adam Schall von Bell in the late Ming Dynasty, this constellation has been classified under the 23 Southern Asterisms with the names Snake's Tail, Snake's Abdomen, Snake's Head and White Patched Nearby.
The name of the western constellation in modern Chinese is 水蛇座, which means "the water snake constellation."
Stars
The map of Chinese constellation in constellation Hydrus area consists of:| Four Symbols | Mansion | Romanization | Translation | Asterisms | Romanization | Translation | Western star name | Chinese star name | Romanization | Translation |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | - | - | - | - | - | - | - |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 蛇尾 | Shéwěi | Snake's Tail | β Hyi | 蛇尾一 | Shéwěiyī | 1st star |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 蛇腹 | Shéfù | Snake's Abdomen | - | - | - | - |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 蛇腹 | Shéfù | Snake's Abdomen | ζ Hyi | 蛇腹一 | Shéfùyī | 1st star |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 蛇腹 | Shéfù | Snake's Abdomen | ε Hyi | 蛇腹二 | Shéfùèr | 2nd star |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 蛇腹 | Shéfù | Snake's Abdomen | δ Hyi | 蛇腹三 | Shéfùsān | 3rd star |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 蛇腹 | Shéfù | Snake's Abdomen | η2 Hyi | 蛇腹四 | Shéfùsì | 4th star |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 蛇首 | Shéshǒu | Snake's Head | α Hyi | 蛇尾一 | Shéshǒuyī | 1st star |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 附白 | Fùbái | White Patches Nearby | - | - | - | - |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 附白 | Fùbái | White Patches Nearby | γ Hyi | 附白一 | Fùbáiyī | 1st star |
| - | 近南極星區 | Jìnnánjíxīngōu | The Southern Asterisms | 附白 | Fùbái | White Patches Nearby | κ Hyi | 附白二 | Fùbáièr | 2nd star |