was a Japanese

amateur astronomer Amateur astronomy is a hobby where participants enjoy observing or imaging celestial objects in the sky using the unaided eye, binoculars, or telescopes. Even though scientific research may not be their primary goal, some amateur astronomers m ...

who discovered Comet C/1996 B2, also known as Comet Hyakutake on January 31, 1996, while using 25×150

binoculars Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held ...

. Hyakutake graduated from the

Kyushu Sangyo University was founded in 1960 in Fukuoka City, and currently has twenty departments and six graduate schools. It is a private university. Undergraduate Faculties and departments *Faculty of Economics **Department of Economics *Faculty of Commerce **Depa ...

as a photography major and started working at a newspaper in

Fukuoka is the List of Japanese cities by population, sixth-largest city in Japan and the capital city of Fukuoka Prefecture, Japan. The city is built along the shores of Hakata Bay, and has been a center of international commerce since ancient times. ...

. He first became interested in

astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...

after seeing

Comet Ikeya–Seki Comet Ikeya–Seki, formally designated C/1965 S1, 1965 VIII, and 1965f, was a long-period comet discovered independently by Kaoru Ikeya and Tsutomu Seki. First observed as a faint telescopic object on 18 September 1965, the first calculati ...

in 1965. He began searching for comets in 1989. In 1993, he moved to Hayato for because “the skies were much clearer there” and so he could better continue his search for comets. His first discovery was Comet C/1995 Y1, on December 26, 1995. Hyakutake discovered C/1996 B2 while looking for C/1995 Y1, a comet he had discovered a few weeks before. He died in

Kokubu, Kagoshima was a city located in Kagoshima Prefecture, Japan. The city was founded on February 1, 1955. As of 2003, the city had an estimated population of 55,237 and the density of 450.88 persons per km2. The total area was 122.51 km2. On November 7, 200 ...

, in 2002 at age 51 of an

aneurysm An aneurysm is an outward :wikt:bulge, bulging, likened to a bubble or balloon, caused by a localized, abnormal, weak spot on a blood vessel wall. Aneurysms may be a result of a hereditary condition or an acquired disease. Aneurysms can also b ...

which had led to

internal bleeding Internal bleeding (also called internal haemorrhage) is a loss of blood from a blood vessel that collects inside the body, and is not usually visible from the outside. It can be a serious medical emergency but the extent of severity depends on b ...

. Asteroid

7291 Hyakutake 7 (seven) is the natural number following 6 and preceding 8. It is the only prime number preceding a cube. As an early prime number in the series of positive integers, the number seven has symbolic associations in religion, mythology, supers ...

is named after him.

References

External links

''Sky and Telescope'' obituary
* {{DEFAULTSORT:Hyakutake, Yuji Discoverers of comets 1950 births 2002 deaths 20th-century Japanese astronomers Amateur astronomers Scientists from Nagasaki Prefecture