(6978) Hironaka

Asteroid (6978) Hironaka
Properties of the orbit ( animation ) Epoch: 4th September 2017 ( JD 2,458,000.5)
Orbit type	Main belt asteroid
Asteroid family	Innes family
Major semi-axis	2.5635 AU
eccentricity	0.1712
Perihelion - aphelion	2.1246 AU - 3.0025 AU
Inclination of the orbit plane	7.4640 °
Length of the ascending node	239.2166 °
Argument of the periapsis	301.3163 °
Time of passage of the perihelion	29th August 2017
Sidereal period	4.10 a
Mean orbital velocity	18.60 km / s
Physical Properties
Absolute brightness	13.4 mag
history
Explorer	Kin Endate Kazurō Watanabe
Date of discovery	September 12, 1993
Another name	1993 RD , 1989 UP ₉ , 1990 YM ₁ , 1991 AN ₄
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

(6978) Hironaka is an asteroid of the main belt , which on 12 September 1993 by the Japanese amateur astronomers Kin EnDate and Kazuro Watanabe at Kitami Observatory ( IAU code 400) on Hokkaido was discovered.

The asteroid belongs to the Innes family, an asteroid family named after (1658) Innes .

The celestial body was named on August 8, 1998 after the Japanese mathematician Heisuke Hironaka (* 1931), who was awarded the Fields Medal in 1970 for his work in the field of algebraic geometry .

Individual evidence