Look up and watch asteroid 1994 PC1 fly past Earth this week

In a slow moving universe, asteroids give us a rare chance to see things moving in real time. We have such a chance coming right up on the evening of Tuesday, January 18, when 1.1-kilometer asteroid (7482) 1994 PC1 passes 1.23 million miles (1.98 million kilometers) from the Earth. This is about five times the distance from the Earth to the moon, and just a shade over the distance to the anti-sunward Earth-sun Lagrange 2 point, soon to be the home of the James Webb Space Telescope.