The 310 - 680 metre wide asteroid 378842 (2008 TD4) will make a close pass (46.5 lunar distances, 0.11959 AU), travelling at 17.00 km/second, to the Earth on the 20th April 2018 @ 11:48 UT ±00:01.
Orbital elements: 2008 TD4 Earth MOID = 0.0899 AU Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC M 209.37792 (2000.0) P Q n 0.40085419 Peri. 54.73215 +0.10095622 +0.98070089 a 1.8217066 Node 222.06266 -0.97455638 +0.06363082 e 0.6173554 Incl. 14.47280 -0.20011924 +0.18486992 P 2.46 H 19.8 G 0.15