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99942 Apophis (provisional designation 2004 MN 4) is a near-Earth asteroid and a potentially hazardous object, 450 metres (1,480 ft) by 170 metres (560 ft) in size, [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability of 2.7% that it would hit Earth on Friday, April 13, 2029.
The only objects on the Torino scale that have ever ranked higher are asteroids 99942 Apophis, which had a rating of 4 for four days in late 2004, the highest recorded rating; (144898) 2004 VD 17, with a historical rating of 2 from February to May 2006; and 2024 YR 4, with a rating of 3 from January 27, 2025 to February 20, 2025.
99942 Apophis: 0.3: June 19, 2004: First asteroid to rank greater than one on the Torino Scale (it was ranked at 2, then 4; now down to 0). Previously better known by its provisional designation 2004 MN 4. 152830 Dinkinesh I Selam: 0.22: November 1, 2023: First satellite discovered to be a contact-binary
The last record holder was Asteroid Apophis in 2004, which briefly had a 2.7% chance of impact. Since its discovery, ... Scientists are still determining the asteroid's size, but it's believed to ...
The odds that asteroid 2024 YR4 could hit Earth in 2032 recently spiked from a little more than 1% to 2.3% as more observations are made. ... Among those objects is Apophis, the cruise ship-sized ...
The only time an asteroid of similar or larger size has been classified higher on the Torino scale was in 2004, when the asteroid Apophis was briefly ranked as a Level 4, with an estimated 2.7% ...
[15] [27] This was the second-highest Torino rating ever reached by an asteroid, behind 99942 Apophis, which briefly reached a rating of 4 in late 2004. [27] NASA's Sentry gave 2024 YR 4 a rating on the Palermo scale as high as −0.18 on 18 February 2025 when it had a 55-day observation arc and a 3.1% chance of impacting into Earth. [7]
The asteroid YR4's chances of impact now surpass the odds that Apophis once had of colliding with Earth when it was first discovered in 2004. Fortunately, the 130 to 300-foot asteroid is much ...