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(415029) 2011 UL 21, provisional designation 2011 UL 21, is an Apollo class potentially hazardous asteroid discovered on October 17, 2011, by the Catalina Sky Survey project. [1] The asteroid is estimated to have a diameter of 2.5 kilometres (1.6 mi). It was rated at Torino Scale 1 on October 27, 2011, with an observation arc of 9.6 days. [4]
A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00257 AU) from Earth in 2011. [note 1] Rows highlighted red indicate objects which were not discovered until after closest approach
Goldstone radar images of asteroid 99942 Apophis on 8–10 March 2021 Goldstone radar images of asteroid 2001 FO 32 during closest approach on 21 March 2021 Below is an example list of near-Earth asteroids that passed or will pass more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2021.
Asteroid designation Date of impact Location of impact Method of detection Estimated size Reference 2008 TC 3: October 7, 2008: Nubian Desert in Sudan: visual, weather satellite, meteorite recovery: 4 m (13 ft) [1] 2014 AA: January 2, 2014: Central Atlantic Ocean: infrasound: 2–4 m (6.6–13.1 ft) [2] 2018 LA: June 2, 2018: Botswana/South ...
A fireball traveling at 42,000 miles per hour streaked across the night sky above Vermont on Sunday night, creating a spectacular light show. The meteor "fragmented so violently," it shook ...
The October 2012 observations reduced the orbit uncertainties by more than a factor of 60, meaning that the Earth's position in February 2040 no longer falls within the range of possible future paths for the asteroid. [8] On 4 February 2040 the asteroid will pass no closer than 0.007 AU (1,000,000 km; 650,000 mi) (~2.8 LD) from Earth. [1]
Disasters Flooding in Thailand reaches the residence of the Prime Minister Yingluck Shinawatra in Bangkok, forcing her to withdraw from the Hawaii APEC summit to deal with the crisis. (Bangkok Post) (Reuters) At least 16 people are killed in a stampede during a religious festival in the Indian city of Haridwar, Uttarakhand. (CNN) A British Red Arrows pilot dies after being accidentally ejected ...
The following is a list of weather events that occurred in 2011. The year began with La Niña conditions. There were several natural disasters around the world from various types of weather, including blizzards, cold waves, droughts, heat waves, tornadoes, and tropical cyclones.