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 18th, when 1.1-kilometer asteroid (7482) 1994 PC1 passes 1.23 million miles (1.98 m
is a S-class stony-type asteroid, and is only slightly larger than another well-known NEO asteroid, 101955 Bennu, the target of NASA's Osiris-Rex sample return mission, which returns to Earth with its precious cargo late next year.
At its closest on the night of January 18th at 21:51 Universal Time , 1994 PC1 will be straddling on the Cetus/Pisces border and moving at a blistering 2 degrees an hour or 2 arc minutes a minute.That's fast enough to see the motion of the speedy asteroid versus the starry background after watching it at the eyepiece for just a minute or two. At its brightest, 1994 PC1 should flirt with magnitude +9 or so, making it easily visible with a small telescope or perhaps, binoculars.
To catch it, you'll need a telescope capable of precisely pointing at coordinates in right ascension and declination. You can get these ephemerides for your time and location by inputting '1994 PC1' atThe night of Monday, January 17th finds asteroid 1994 PC1 low to the south at dusk on the border of the southern hemisphere constellations of Fornax and Eridanus. Tough, though not an impossible target for North American observers.
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