Richard A. Proctor
![Richard A. Proctor](https://upload.wikimedia.org/wikipedia/commons/2/26/Richard_Anthony_Proctor2.jpg)
He used old drawings of Mars dating back to 1666 to try to determine the sidereal day of Mars. His final estimate, in 1873, was 24h 37m 22.713s, very close to the modern value of 24h 37m 22.663s.
The crater Proctor on Mars is named after him. Provided by Wikipedia
1
Published: 1875
Superior document: Természettudományi könyvkiadó-vállalat 8