A newly discovered asteroid designated 2018 BX will flyby Earth at 0.73 LD / 0.00188 AU (~281 243 km / 174 756 miles) at 23:00 UTC on January 19, 2018. This is the second known asteroid to flyby Earth within 1 lunar distance today, the other one will fly by at 20:22 UTC.

Asteroid 2018 BX belongs to the Aten group of asteroids. It was first observed at Catalina Sky Survey on January 18, a day before its closest approach.

Its diameter is between 3.6 and 8 m (11.8 - 26.2 feet) and it will fly past us at a speed (relative to the Earth) of 5.85 km/s.

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

2018 BX is the second known asteroid to flyby Earth within 1 lunar distance today, the 4th known within 1 lunar distance since January 15, 5th since the start of the year and the 58th since January 1, 2017. You can find them all in our Near-Earth Objects category.

It also comes one day after asteroid 2018 BD flew past us at just 0.10 LD / 0.00026 AU (~38 895 km / 24 168 miles), some 7 hours after it was discovered.

Reference:

Asteroid 2018 BX at Minor Planet Center; at CNEOS