Scientists are not aware of any comet that may be visible in 2012. Not to say that ther won't be one - but we haven't discovered one yet.
You may be getting worried about the FICTIONAL movie "2012". It's just a make-believe story.
ANSWER:
By the end of or probably January 2012. 433 Eros, the second-largest Near Earth Object on record (size 13×13×33 km) will pass Earth at 0.1790 astronomical units (26,778,019 km; 16,639,090 mi). NASA studied Eros with the NEAR Shoemaker probe launched on 1996-02-17.
none we hope .
Halley's Comet is still orbiting the Sun. It was close to Earth in 1986.
10 years from the year 2012
The name of the comet that will pass Earth on August 15, 2011, is the comet Honda.
No. in 1961 the comet was way out in the solar system, the recent close approaches were in 1910 and 1986 - non of there were as close as 10 miles from the nucleus, although Earth did pass through the comets tail in 1910.
i dunnoo... jeez
We expect the only Halley's Comet there is to return to the inner solar system in 2061. That means it'll get close enough to the sun so that we can see it, but we can't tell yet exactly how close to earth it's likely to get.
in 2016 .
The next comet will be Comet Ison which will pass by the earth in 2013. It will be visible with lenses during late summer and will be visible to the naked eye by approximately November.
When they pass close to the sun, the heat creates vapor which becomes a tail
over 300 years.
It should pass by Earth again in 2061.