(9147) Kourakuen Main-belt Asteroid
Discovered on 18 February 1977 by Kosai, H., Hurukawa, K. at Kiso.
Kourakuen in Okayama is one of the three most outstanding gardens in Japan. Its construction was begun in 1686.Naming citation (20030106/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Kourakuen is today
Seen from above the solar system on 2026-10-14: Kourakuen is 2.40 au from the Sun and 3.22 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9147 |
| Provisional designation | 1977 DD1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.92 km (#10,763 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.241 |
| Absolute magnitude (H) | 13.76 |
| Orbital period | 3.24 years |
| Semi-major axis | 2.19 au |
| Perihelion – aphelion | 1.96 – 2.42 au |
| Eccentricity | 0.106 |
| Inclination | 5.82° |
| Closest distance between its orbit and Earth's (MOID) | 0.973 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 18 February 1977
- (2330) Ontake
- (2924) Mitake-mura
- (2960) Ohtaki
- (3249) Musashino
- (3391) Sinon
- (3607) Naniwa
- (4186) Tamashima
- (4812) Hakuhou
- (4963) Kanroku
- (5017) Tenchi
- (5082) Nihonsyoki
- (7104) Manyousyu