A newly discovered asteroid, 2015 TB145 as it called, is set to fly by Earth on October 31, 2015 and should be visible (using a telescope of a decent size) moving in front of the stars.
According to NASA, the asteroid 2015 TB145 is classified as a potentially hazardous object — within the 7,500,000km threshold of proximity to Earth — and it is the largest known asteroid to come near Earth until 2027. It was discovered just 10 days ago, by NASA’s Pan-STARRS I survey in Hawaii.
The ‘Halloween asteroid’ will makes its closest approach on 11:14 a.m. ET (15:14 UTC) ~ October 31, 2015, zoom past the Earth at a scant 0.0032 AU, or 1.3 lunar distances — about 479,000 km or 297,000 miles. Its a safe distance away, so there is no need to panic. NASA is confident the asteroid will nearly miss the Earth and is following an eccentric and high-inclination orbit. This is the reason why it was only just recently discovered.
The asteroid is on an extremely eccentric and a high inclination orbit,
the space agency explained.
This is the closest approach by a known object this large until 1999 AN10 approaches within 1 lunar distance in August 2027
The last approach closer than this … was by 2004 XP14 in July 2006 at 1.1 lunar distances.
The huge asteroid, estimated to be between 280 to 620 m in diameter, will pass by Earth traveling with the top speed of about 126,000 km/h. It will pass closer to our Moon, only 280,000 kilometers of it.
The brightness of the asteroid is said to have an absolute magnitude of 19.9, meaning it won’t be visible to the naked eye. It will move across the constellation Orion on the night of Oct. 30 into Halloween.
Bottom line: According to NASA’s Near-Earth Object Observations Program, as of 16 October 2015, 13,251 near-Earth objects have been discovered, 877 of which are asteroids with a diameter of approximately 1 kilometre or larger. Some 1,635 of these have been classified as Potentially Hazardous Asteroids (PHAs).