How to deflect an asteroid

26 Février, 2020, 16:52 | Auteur: Therese Cote
  • MIT Develops Guide to Deflect Killer Asteroids

Rather, MIT researchers have devised a decision map to look into the best kind of mission that would deflect an asteroid.

As reported by SciTechDaily, this new decision method "takes into account an asteroid's mass and momentum, its proximity to a gravitational keyhole, [the small window in which a planet's gravity could alter an orbit of an asteroid to cause it to collide with the planet on a future orbital pass, ] and the amount of warning time that scientists have of an impending collision - all of which have degrees of uncertainty, which the researchers also factor in to identify the most successful mission for a given asteroid". The "Keyhole" refers to a gravitational field that all but guarantees an object will collide with the earth once it has been entered.

Researchers have applied this method to Apophis and Bennu, near-Earth asteroids that are targeted by OSIRIS-REx, a NASA operational mission that attempts to bring a sample of Bennu's surface to our planet by 2023. Its like a preemptive strike, with less mess.”.

"Does it matter if the probability of success of a mission is 99.9 percent or only 90 percent?" If these asteroids get nudged or their trajectories slightly change, they could end up on a direct collision course with the planet. "When it comes to deflecting a potential planet-killer, you bet it does", said co-author Olivier de Weck, an MIT professor of aeronautics and astronautics and engineering systems. “Therefore we have to be smarter when wedesign missions as a function of the level of uncertainty.

Another involved dispatching a "scout" before the projectile, to measure the asteroid and advise scientists on what type of projectile to resort to. The third consists of two halves: a scout and small impactor to potentially deflect the asteroid in the first phase, and then a second larger impactor to make completely sure the asteroid is no threat.

Bruno Fernandes vows to get United into Champions League
Just last Monday, the defender put in a commanding display as United beat Chelsea 2-0 at Stamford Bridge. The Norwegian went on to add that he is the "biggest" critic of Anthony and he wants "more from him".

Opelka does double duty to win ATP Delray Beach title
Opelka blasted his 15th ace to save match point, then watched Raonic send two forehands beyond the baseline to force a third set. It was Garin's second title this year after winning the Cordoba Open in Argentina earlier in February. "I love playing at home".

‘Better Call Saul’ season 5 premiere
While he works, he leaves a message on her machine, first chatting about meth production and finally inviting her to the symphony. So he's going to take what stays of his flip handset stock and Santa-Claus it to them, pace dial preprogrammed to name Saul .

The tests ran on Bennu, and Apophis turned out to be very efficient. With less than one year of notice, it's unlikely we could do anything to stop an asteroid from passing through a keyhole. That's another reason why Apophis and Bennu were considered, their gravitational keyhole locations are known by scientists.For instance with Apophis, the scientists found that if it passes through its keyhole within one Earth year or less, it may be too late, even for the impactor strategy to work.

“Even a main impactor may not be able to reach the asteroid within this timeframe, ” Paek says.

If another asteroid did approach, "All we have to do is change its speed a little faster or a little slower so that when it crosses Earth's orbit, it crosses either in front of us or behind us", Dr. Lori Glaze, director of planetary science at NASA, told CBS News a year ago. Like other asteroids that belong to this group, 2020 BW13 follows a unsafe orbit that occasionally intersects Earth's path as it makes its way around the Sun.

"It doesn't really keep me up at night", Glaze said.



Winning numbers for $35 million Lotto Powerball jackpot revealed
Over the past decade, Lotto NZ returned nearly $2.2 billion in profits to communities all around New Zealand. Strike Four was also won last night by two players from Auckland and Marton, who each take home $200,000.

Potter leads Badgers to win, tie for 2nd place in Big Ten
The Badgers were hot from distance, hitting 10 of their first 20 from behind the 3-point line as they built a comfortable lead. Coach Steve Pikiell has them at 18-10 on the season and 9-8 in Conference, now good for 8th place.

UAE Tour 2020: Fernando Gaviria frustrated in opening stage sprint finale
Two or three months ago I could barely walk, I had a limp. "It will be a huge relief just to be back in the peloton again". For now, however, this was a moment for him and his team to savior. "I know what condition I'm in".

Bernie Sanders Set to Win Nevada Democratic Caucus
Bernie Sanders (I-VT) speaks during a campaign rally at the University of Houston on February 23, 2020 in Houston, Texas. Biden has a realistic chance of winning SC next week, the sole remaining contest before Super Tuesday on March 3.

Lakers beat Celtics in National Basketball Association
Despite the absence, the Celtics proved they still have the potential to compete with playoff-caliber teams. Only the leaders of the Conference, the Milwaukee Bucks and the Lakers, are above them in this metric.

Trump taps loyalist Grenell as nation's top intel official
At a 2018 summit, he said he found Russian President Vladimir Putin's denials of Russian meddling "extremely strong and powerful". Stefanik has repeatedly acknowledged in the past that Moscow intervened on Trump's behalf.

Benzema explique comment il se sert des critiques pour avancer — Real Madrid
La confrontation hispano-anglaise entre le Real et City offrira aux amoureux du ballon rond l'opportunité de voir des duels à la pelle.

Snow and ice weather warning issued for Kilkenny
The Met Office said the mercury dropped to minus 4.5C at the Cairnwell in the Scottish Highlands over night. The Met Office alert came into effect at midnight on Sunday, with temperatures dropping to freezing.

South Korea coronavirus cases more than double in a day
The hospital and Shincheonji Church of Jesus in Daegu have been linked to almost 60 confirmed COVID-19 patients this week. The coronavirus originated in China before spreading to some 26 countries and territories outside mainland China.

Israeli strike in Damascus killed 2 Islamic Jihad members: Group
Islamic Jihad has not accepted the deals, and Israeli officials warn the group could be seeking to provoke a fresh conflict. Israel has a general election on March 2, its third in less than a year after deadlocked polls in April and September 2019.