Tags: Planet.

6390 Hirabayashi (1990 BG1) is a main-belt asteroid discovered on January 26 1990 by Endate K. Watanabe K. at Kitami.

apoapsis (km)
5.07598e+11
orbital period (μ)
1.54237e+08
periapsis (km)
3.54069e+11
absolute magnitude
12.4
discovery date
1990-01-26
discoverer
Kazuro Watanabe, Endate_K.
epoch
May 14 2008
former name
1990 BG1

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