17 April 2017 News

April 19th to be an exciting day for stargazers as an asteroid and a comet pass close to Earth

On April 19, an asteroid known as 2014-JO25, measuring 650 metres across is expected to come within 1.8 million kilometers of Earth, which is five times less than the distance to the Moon. It will approach Earth after flying around the Sun and will go on to Jupiter before looping back towards the center of the Solar System. 2014-JO25 has not been this close to Earth for nearly 400 years, and won't be back again until after 2600. The asteroid was discovered in May of 2014 by scientists at the Catalina Sky Survey by Tuscon, Arizona. According to NASA statement, «Although there is no possibility for the asteroid to collide with our planet, this will be a very close approach for an asteroid this size»

This is expected to be the last close encounter with a large asteroid for the next ten years – in 2027, the 800-metre 199-AN10 asteroid will come as close as 380000 km. Although smaller asteroids fly by the Earth almost every day, the last time such a large celestial body came this close was in 2004, when the 5 km Toutatis flew by at four lunar distances.

According to NASA, "Astronomers plan to observe it with telescopes around the world to learn as much about it as possible." As the asteroid is twice as reflective as the Moon, it should be visible to amateur stargazers with a small optical telescope for one or two nights.

2014-JO25 won't be the only visitor in our part of the Solar System on April 19th, as the PanSTARRS non-periodic comet will also by flying by that day at a distance of 175 million km. Also known as the C/2011 L4, the comet is expected to be visible at dawn with binoculars. It was discovered in 2011 using the Pan-STARRS telescope in Hawaii and has a nucleus of about 1 kilometer.


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