Kiyotsugu Hirayama
| Use attributes for filter ! | |
| Gender | Male |
|---|---|
| Death | 81 years ago |
| Date of birth | October 13,1874 |
| Zodiac sign | Libra |
| Born | Sendai |
| Miyagi | |
| Japan | |
| Date of died | April 8,1943 |
| Died | Tokyo |
| Japan | |
| Date of Reg. | |
| Date of Upd. | |
| ID | 1290818 |
Kiyotsugu Hirayama Life story
Kiyotsugu Hirayama was a Japanese astronomer, best known for his discovery that many asteroid orbits were more similar to one another than chance would allow, leading to the concept of asteroid families, now called "Hirayama families" in his honour.
Kiyotsugu Hirayama Photos
