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Big asteroid will safely pass Earth on Halloween
by Eddie Irizarry in Blogs » Human World, Science Wire, Space
NASA says 2015 TB145 is the biggest known asteroid to sweep near Earth until 2027. Itll pass at 1.3 times the moons distance and be visible through telescopes!
A newly found asteroid of notable size will safely pass by Earth on October 31, 2015 and should be visible moving in front of the stars, with the help of a telescope, the night before. According to NASA, asteroid 2015 TB145 will be the biggest known asteroid to come near Earth until 2027. It was discovered just over a week ago, on October 10, from the Pan-STARRS I telescope in Hawaii. The Halloween asteroids closest approach will occur on 11:14 a.m. ET (15:14 UTC) on October 31, 2015.
However, observers trying to glimpse the space rock using telescopes will have to look late on the night of October 30, and before dawn on October 31.
The huge asteroid will pass Earth at 310,000 miles (498,896 km) or 1.3 times the Earth-moon distance, which is a totally safe pass. Itll come closer to the moon than to Earth, only 180,000 miles (280,000 km) from the moon.
The space rocks brightness will be at an approximate magnitude of 10, which is fainter than the eye alone can see. But the asteroid should be easy to spot slowly moving across the field of stars if you know when and where to look. And, by the way, although the asteroids distance will make this moving object appear to move slowly, this speeding space rock is traveling at 78,000 miles (126,000 km) per hour!
On the night of October 30-31, the asteroid will be traveling across the well-known constellation of Orion
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trotsky
(49,533 posts)"It was discovered just over a week ago"
Koresh, we are so unprepared for this kind of stuff.
Panich52
(5,829 posts)sdfernando
(4,935 posts)Is it passing close enough to the moon to affect it's orbit around Earth...If so, what are the consequences?
ffr
(22,669 posts)It's too small and traveling so fast, I doubt it would have a significant tug on either. Plus, the moon is already moving away from Earth, being slung away ever so slightly each year. Having some of that reversed or slowed, would probably be a good thing...over hundreds of millions of years.
sdfernando
(4,935 posts)localroger
(3,626 posts)At about 1 mile in diameter the asteroid isn't "28 times as big" as the Chelyabinsk meteor. It's about 28 times the DIAMETER, but the damage is caused by the MASS which is proportional to volume, so more like 23,000 times the size as Chelyabinsk. If it hit the Earth it probably wouldn't quite be big enough to trigger a global extinction event like the K-T impactor (which was probably about 10 miles in diameter, or 1,000 times bigger than this guy) but it would make a hell of a mess over an area of thousands of square miles.