The National Aeronautics and Space Administration (NASA) issued a warning that a larger asteroid with a diameter of about 200 meters crosses the Earth on July 24.
The US spacecraft have named this asteroid Asteroid 2020 ND. This asteroid is also classified by NASA as potentially hazardous asteroid (PHA) and near-Earth Object (NEO). The asteroid is estimated to have a diameter of 120-260 meters, and according to experts at NASA, this is not the only asteroid flying over the Earth this month; goes before and after it has 4 more objects.
Asteroids larger than about 35 meters can pose a threat to the town or city.
According to NASA, asteroids are expected to be accessible near the Earth on Friday, 24/7 Asteroids 2020 ND will be 0.034 astronomical units (5,086,328 km) from our planet and now It is traveling at a speed of 48,000 km per hour.
The five target planets that will fly over the Earth this month include BF25 2020 on July 21, 2020 ND on July 24, 2020 MX3 on July 19, PY7 2018 and RF1 2007 on July 31. According to experts, asteroids predicted to be dangerous are currently being determined based on measurement parameters of approach to Earth. Scientists say the asteroids are remnants, not much changed from the formation of the solar system about 4.6 billion years ago.
In the United States, NASA is mandated by Congress to detect, monitor and classify any NEO with a diameter of at least 1 km, because their collision with the Earth could cause a major disaster for the planet. planet. As of August 2012, 848 near-Earth asteroids have been found larger than 1 km in diameter, 154 of which are potentially dangerous (PHA).
What are asteroids potentially dangerous?
Potential asteroids (PHA) are currently being identified based on the potential measurement parameters of these asteroids to make close-approach artillery approaches to Earth. Specifically, all asteroids have a minimum distance of Earth’s orbit from 0.05 astronomical units (19.5 times the distance to the Moon) and an absolute intensity of 22 or bright than.
As of January 2018, there are 1,885 known PHAs (about 11% of the total number of objects near the Earth), of which 157 are estimated to be more than one kilometer in diameter (PHO).
Most of the PHOs detected were Apollo asteroids (1,601) and fewer belonged to the Aten asteroid group (169). A potentially dangerous object may be known not to be a threat to the Earth for the next 100 years or more, if its orbit is properly determined. Dangerous asteroids are usually only dangerous on a time scale of hundreds of years as the known orbit becomes more different.
An object is considered PHO if its minimum orbital intersection distance (MOID) from Earth is less than 0.05 AU (7.5 million km; 4,600,000 miles) – a distance of about 19.5 intervals to the Moon – and its absolute intensity is brighter than 22, corresponding to a diameter of over 140 meters (460 ft). This is large enough to cause regional devastation to human settlements unprecedented in human history in the case of land, or tsunamis in the case of Ocean.
In 2006 astronomers estimated that about 20% of asteroids near the Earth were not discovered. The NEOWISE program announced results in 2011, that about 93% of NEA objects larger than 1 km in diameter were found and only 70 dangerous asteroids were not discovered. Current potentially hazardous objects (PHOs) are defined based on parameters that measure the trend of a dangerous object as it approaches the Earth.
What are objects near the Earth (NEO)?
According to NASA, objects near the Earth (NEO) are comets and asteroids that have been affected by the gravity of nearby planets and orbits that allow them to enter the vicinity of the Earth.
Objects considered to be close to Earth must have a perihelion less than 1.3 AU. These include several thousand near-Earth asteroids (NEA), comets near Earth, and some spaceships orbiting the Sun, as well as a number of meteors large enough to track before they fall to Earth. Land.
Refer to Business Insider