Asteroid 2018 EB has a moon

earthsky.org | 10/17/2018 | Eddie Irizarry
finter (Posted by) Level 4
Click For Photo: http://en.es-static.us/upl/2018/10/asteroid-2018-EB-moon-cp-300x169.jpg







Asteroid 2018 EB and its moon.

Asteroid 2018 EB has an orbit around the sun that’s very similar to Earth’s orbit, but with a different inclination. As a result, every year for countless millions or even billions of years, this space rock has been coming relatively close to our planet twice, in April and October. In April, 2018, astronomers spotted it, at last, using NASA’s NEOWISE spacecraft. Then, at the October passage, they found something else. Asteroid 2018 EB has a moon!

EB - Contrast - Asteroids - Diameter - Feet

Asteroid 2018 EB is not huge in contrast to the biggest asteroids. But it’s good-sized, with an estimated diameter of 509 feet (155 meters) to 787 feet (240 meters).

Scientists at Arecibo Observatory in Puerto Rico and at the Goldstone Radar in California made the recent radar observations showing the secondary or satellite asteroid – the moon – orbiting this asteroid, as both space rock swept within 15 lunar-distances of Earth on October 7, 2018. This was close enough for astronomers using radar to get a better-than-usual look.

Moon

That’s when they spotted the moon.

The space rock made an approach at 10 lunar distances in April 4, 2018, while on October 7, 2018 it passed at 15 times the Earth-Moon distance.

Asteroid - Approaches - Year

The asteroid’s approaches of this year are the closest until...
(Excerpt) Read more at: earthsky.org
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