If you have a "medium-size telescope", you may be able to spot this one:

"The space agency's Near-Earth Object Program Office says the small space rock – dubbed 2011 MD – will pass 7,500 miles above Earth's surface over the southern Atlantic Ocean at about 6:30 a.m. PDT. Though it will come close, it's not a distance record holder. Earlier this year, a tiny asteroid flew by even closer – within 3,400 miles."