NASA Just Gave Us 10 Good Reasons to Hunt For Near-Earth Asteroids
Our solar system suddenly feels a bit crowded, the NASA Earth Affairs mission has just released a year of survey data, putting many new space rocks on our radar.
Most of the asteroids, comets and general groups of cosmic dandruff are too far away to be considered a threat to our planet, but NASA ensure they keep a close eye on 10 objects that they think may be large and close enough to Be considered a hazard.
As its name implies, the infrared sky of the open infrared explorer near the Earth of the orbit of the NASA (NEOWISE) is an orbital telescope that looks for objects in our solar system with orbits that could take to the planet.
In 2010, NASA’s wide-field infrared spacecraft scout ran out of coolant to his telescope, so the researchers narrowed down the mission to sweep the skies closer to home instead of looking around at the cosmos.
After a two-year nap in 2011, the spacecraft was revived and had a total of 693 near-Earth objects. Of these, 114 had never been seen before.
Last year he discovered NEOWISE 5 new comets, 64 asteroids to the main belt and 28 near-Earth objects.
He found that by using his low-pass infrared telescope to push 2.6 million images of the sky.
A new technique called adaptive tail allowed researchers to use the image database to model comet behavior by sweeping the solar system.
“Comets have steep bursts not commonly encountered, but this may be due more to the sudden nature of the activity rather than its inherent rarity,” says Emily Kramer’s Jet Propulsion Laboratory (JPL) of NASA California.
“It is very good for astronomers to see and collect kite data when they encounter an explosion, but the activity has a very short life, we can simply lose them most of the time.
To get an idea of the total number of objects, see the clip below, which shows the orbits of asteroids on gray objects, kites near the Earth in green and yellow:
But what about these 10 potentially dangerous asteroids (PHAs)? Is it time to invest in silver and wait for the fireball in the grandfather of the bunker?
PHAs are classified as asteroids that have a minimum orbital intersection distance of 0.05 astronomical units (1 AU is the distance from Earth to the Sun, so 0.05 AU is about 7.5 million kilometers, or 4.6 Millions of miles).
It should also be large enough to have absolute magnitude of 22 or brighter, making them larger than 140 meters (about 500 feet) in size, assuming they were quite reflective.
So far, we know that 1,806 of these objects, and some will make us shave in the next few years, none seems to be for our backyard.
Do not alter the grandfather in the shortest possible time, however – a team of astronomers from the Czech Academy of Sciences believes that the risk of being hit with a big stone in the next few years is more and more.
Their findings are based on an analysis of 144 meteors of rainy weather Taurid that affected our atmosphere and exploded, also commonly called fireballs.
With the comet Encke is thought that Tauridas are the remains of a comet that disintegrated even greater in the last 20 000 to 30 000 years.
The researchers say they have found a new branch of debris, which they suspect has at least two asteroids between 200 and 300 meters (about 650 to 1000 feet) in size.
“Most likely, the branch also includes numerous detected asteroids that are tens of meters in diameter or more,” the Czech Academy said in a press release.
“Therefore, the danger of an accident with an asteroid grows significantly when the Earth encounters this flow of interplanetary material.”
The researchers noted that asteroids greater than 300 grams (about 10.5 ounces) were extremely brittle.