Asteroid 2004MN4 is an exceptionally high impact threat: the boffins give it one chance in 45 of intersecting with Earth on 2029 April 13.
Monday: Or not; newer measurements have taken that date off the list, though they still give 2004MN4 one chance in about thirty thousand of hitting us sometime in the coming century.
2004MN4, now named 99942 Apophis, is back on the list with one chance in 5883 of impact on 2036 April 13.