將在4月29日越過地球的小行星1998 OR2,當天最接近只距離地球400萬哩(600萬公里)
First glimpses of the huge asteroid – (52768) 1998 OR2 – that will pass closest to Earth on April 29.
Radar image of asteroid 1998 OR2, acquired April 18, 2020. According to current estimates, this space rock is probably at least a mile wide (1.8 km) and maybe 2 1/2 times that long (4.1 km). Image via Arecibo Observatory in Puerto Rico.
At its closest on April 29, the asteroid will be 4 million miles (6 million km) from us, or about 16 times the Earth-moon distance.
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