9108 Toruyusa is a Main Belt

Asteroid belt

The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets...

 minor planet

Minor planet

An asteroid group or minor-planet group is a population of minor planets that have a share broadly similar orbits. Members are generally unrelated to each other, unlike in an asteroid family, which often results from the break-up of a single asteroid...

, with the provisional designation 1997 AZ₆, discovered by Takao Kobayashi

Takao Kobayashi

is an amateur Japanese astronomer who currently works at the Ōizumi Observatory.- Accomplishment :Kobayashi has discovered more than 2000 asteroids using CCD technology, including the Amor asteroids 7358 Oze, , and about nine Trojan asteroids...

 at Oizumi Observatory

Oizumi Observatory

Ōizumi Observatory is a private astronomical observatory in Ōizumi, Gunma Prefecture, Japan. Takao Kobayashi has made discoveries of numerous minor planets at the observatory. Since its founding, Kobayashi has discovered 1,200 minor asteroids and their positions using a telescope....

. It is named for Toru Yusa (born 1966), director of the planetarium

Planetarium

A planetarium is a theatre built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation...

 and observatory

Observatory

An observatory is a location used for observing terrestrial or celestial events. Astronomy, climatology/meteorology, geology, oceanography and volcanology are examples of disciplines for which observatories have been constructed...

 at the Osaki Lifelong Learning Center in Miyagi Prefecture

Miyagi Prefecture

is a prefecture of Japan in the Tōhoku Region on Honshu island. The capital is Sendai.- History :Miyagi Prefecture was formerly part of the province of Mutsu. Mutsu Province, on northern Honshu, was one of the last provinces to be formed as land was taken from the indigenous Emishi, and became the...

, Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, 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...

. He is also prominent in the search for and study of comets.

Orbital Details

• eccentricity
  Orbital eccentricity
  The orbital eccentricity of an astronomical body is the amount by which its orbit deviates from a perfect circle, where 0 is perfectly circular, and 1.0 is a parabola, and no longer a closed orbit...
  
   0.1342937
• semimajor axis  2.5353855 astronomical units
• perihelion 2.1948992 astronomical units
• aphelion 2.8758718 astronomical units
• inclination
  Inclination
  Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit...
  
   3.46478 degrees
• ascending node 157.98859 degrees
• argument of perihelion 234.04850 degrees
• period
  Orbital period
  The orbital period is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars.There are several kinds of...
  
   1474.5667344 days

The absolute magnitude

Absolute magnitude

Absolute magnitude is the measure of a celestial object's intrinsic brightness. it is also the apparent magnitude a star would have if it were 32.6 light years away from Earth...

 is +14.3. The rotational period, density

Density

The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is ρ . In some cases , density is also defined as its weight per unit volume; although, this quantity is more properly called specific weight...

, size and shape are unknown.