Named in memory of Kiyotsugu Hirayama (1874-1943), discoverer of the so-called Hirayama families of minor planets. Hirayama is also honored by a lunar crater.
Professor Hirayama, of the Astronomical Observatory, Tokyo, was elected a Corresponding Fellow of the Royal Astronomical Society of Canada on 1907-10-01.
Orbit type: Main Belt Asteroid
Reference: M 4237
Name:
Hirayama
Number:
1999
Designation:
1973 DR
Disc. Date:
1973-02-27
Discoverer:
Kohoutek, L.
Disc. Place:
Bergedorf