Japan is an island country in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, People's Republic of China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south.... ese astronomer
Astronomer
An astronomer is a scientist who studies Celestial body such as planets, stars, and Galaxy.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using physical laws.... , best known for his discovery that many asteroid
Asteroid
Asteroids, sometimes called minor planets or planetoids, are small Solar System bodies in orbit around the Sun, smaller than planets but larger than meteoroids.... orbits were more similar to one another than chance would allow, leading to the concept of asteroid families, now called Hirayama families
Hirayama families
A Hirayama family of asteroids is a group of minor planets that share similar orbital elements, such as semimajor axis, eccentricity , and orbital inclination.... in his honour.
Hirayama is a large Moon Impact crater that is located on the Far side of the Moon, just beyond the eastern limb. This region of the surface is sometimes brought into view from Earth during periods of favourable libration.... on the Moon
Moon
The Moon is Earth's only natural satellite and the List of natural satellites by diameter satellite in the Solar System. The average centre-to-centre distance from the Earth to the Moon is km, about thirty times the diameter of the Earth.... is jointly named after him and Shin Hirayama
Shin Hirayama
Shin Hirayama was the first Japanese astronomer to discover an asteroid. In 1900 he discovered 498 Tokio and 727 Nipponia.The crater Hirayama on the Moon is jointly named after him and Kiyotsugu Hirayama.... . The asteroid 1999 Hirayama
1999 Hirayama
1999 Hirayama is an asteroid. It is named after Kiyotsugu Hirayama, the 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.... is named in his honour.
