Tags: Planet.

2209 Tianjin (1978 US1) is a main-belt asteroid discovered on October 28 1978 at the Purple Mountain Observatory.

apoapsis (km)
4.54189e+11
orbital period (μ)
1.51578e+08
periapsis (km)
3.97547e+11
absolute magnitude
10.9
albedo
0.2854
epoch
May 14 2008
former name
1978 US1

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