events
The potentially hazardous asteroid 2005 YU55 passes 0.85 lunar distances from Earth (about 324,600 kilometres or 201,700 miles), the closest known approach by an asteroid of its brightness since 2010 XC15 in 1976.
Related Wikipedia articles
Potentially hazardous object
Hazardous near-Earth asteroid or comet
A potentially hazardous object (PHO) is a near-Earth object – either an asteroid or a comet – with an orbit that can make close approaches to the Earth and which is large enough to cause significant regional damage in the event of impact. They are conventionally defined as…Source: Wikipedia (CC BY-SA)
(308635) 2005 YU55
Potentially hazardous near-Earth asteroid
(308635) 2005 YU55, provisionally named 2005 YU55, is a potentially hazardous asteroid 360±40 meters in diameter, as measured after its Earth flyby. Previously it was estimated to be 310 meters or about 400 m (1,300 feet) in diameter. It was discovered on 28 December 2005 by…Source: Wikipedia (CC BY-SA)
Lunar distance
Distance from center of Earth to center of Moon
The instantaneous Earth–Moon distance, or distance to the Moon, is the distance from the center of Earth to the center of the Moon. In contrast, the Lunar distance, or Earth–Moon characteristic distance, is a unit of measure in astronomy. More technically, it is the semi-major…Source: Wikipedia (CC BY-SA)
Absolute magnitude
Measure of the luminosity of celestial objects
In astronomy, absolute magnitude is a measure of the luminosity of a celestial object on an inverse logarithmic astronomical magnitude scale; the more luminous an object, the lower its magnitude number. An object's absolute magnitude is defined to be equal to the apparent…Source: Wikipedia (CC BY-SA)
(745311) 2010 XC15
Near-Earth asteroid Christmas 2022
(745311) 2010 XC15 (provisional designation 2010 XC15) is an Aten near-Earth asteroid and potentially hazardous object that spends most of its time inside of the orbit of Earth. It has an observation arc of 10 years and an Uncertainty Parameter of 1. It was discovered on 5…Source: Wikipedia (CC BY-SA)