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Near-Earth comets (NECs) are objects in a near-Earth orbit with a tail or coma made up of dust, gas or ionized particles emitted by a solid nucleus. Comet nuclei are typically less dense than asteroids but they pass Earth at higher relative speeds, thus the impact energy of a comet nucleus is slightly larger than that of a similar-sized ...
Articles about near-Earth objects, including any small Solar System body whose orbit brings it into proximity with Earth.By convention, a Solar System body is a NEO if its closest approach to the Sun is less than 1.3 astronomical units (AU).
About 1000 objects per year EURONEAR: 2006 [2] International Near-Earth Asteroid Survey: Lincoln Near-Earth Asteroid Research (LINEAR) 1998 Lowell Observatory Near-Earth-Object Search: 1993 2008 Near Earth Object Surveillance Satellite: 2013 Microsatellite observatory Near-Earth Asteroid Tracking (NEAT) 1995 2007 NELIOTA: 2017 2023
The celestial near-Earth object, known as 2024 PT5, measures about 33 feet (10 meters) wide; however, it’s not in any danger of colliding with Earth now or over the next few decades due to its ...
The lists below are based on the close approach database of the Center for Near-Earth Object Studies (CNEOS), in its state as of 27 February 2025. [2] The database lists any approaches with a minimum distance less than 0.2 astronomical units (AU) from 1900 and until a century into the future which have been derived by orbit calculations.
According to Nasa's Center for Near-Earth Object Studies, Asteroid 2024 YR4 has fallen off the Torino scale after recent observations. The impact probability dropped to 0.0017% or 1-in-59,000 odds ...
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.
A small asteroid is predicted to make one of the closest approaches by a near-Earth object ever recorded on Thursday, Jan. 26. ... data and predicted the near miss. While any asteroid in Earth’s ...