Kiyotsugu Hirayama

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.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Who was born first?

• Kiyotsugu Hirayama and Frank Elmore Ross were born the same year
• Kiyotsugu Hirayama and August Krogh were born the same year
• Kiyotsugu Hirayama and Chaim Weizmann were born the same year
• Kiyotsugu Hirayama and Vagn Walfrid Ekman were born the same year
• Kiyotsugu Hirayama and Joseph Erlanger were born the same year

Timeline

1. August KroghNovember 15, 1874 – September 13, 1949
2. Chaim WeizmannNovember 27, 1874 – November 9, 1952
3. Frank Elmore RossApril 2, 1874 – September 21, 1960
4. Joseph ErlangerJanuary 5, 1874 – December 5, 1965
5. Kiyotsugu Hirayama (this page)October 13, 1874 – April 8, 1943
6. Vagn Walfrid EkmanMay 3, 1874 – March 9, 1954

Related

• Isaac NewtonDecember 25, 1642 – March 20, 1727
• Johann Wolfgang von GoetheAugust 28, 1749 – March 22, 1832
• Immanuel KantApril 22, 1724 – February 12, 1804
• René DescartesMarch 31, 1596 – February 11, 1650
• Marie CurieNovember 7, 1867 – July 4, 1934
• Nicolaus CopernicusFebruary 19, 1473 – May 24, 1543
• Louis PasteurDecember 27, 1822 – September 28, 1895
• Gottfried Wilhelm LeibnizJune 21, 1646 – November 14, 1716