Orbital elements: 2009 SQ171 Earth MOID = 0.0792 AU Epoch 2009 June 18.0 TT = JDT 2455000.5 MPC M 307.86715 (2000.0) P Q n 0.52169646 Peri. 176.46707 +0.99899636 -0.04257800 a 1.5282373 Node 186.02616 +0.03716024 +0.96117965 e 0.2917695 Incl. 7.61203 +0.02500784 +0.27261840 P 1.89 H 25.7 G 0.15 U 7
The 19 - 43 metre wide asteroid 2009 SQ171 made a close pass (31.2 Lunar Distances, 0.0801 AU), travelling at 5.04 km/s, to the Earth-Moon system on the 25th September, 2009.