Contains:  Solar system body or event
216 Kleopatra Asteroid (75 miles long) captured while shooting Einstein's Cross, KuriousGeorge

216 Kleopatra Asteroid (75 miles long) captured while shooting Einstein's Cross

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This was a lucky find for sure. The title pretty much describes what happened here. 

"Kleopatra is a large asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt.

NASA JPL has not classified Kleopatra as potentially hazardous because its orbit does not bring it close to Earth.

Kleopatra orbits the sun every 1,710 days (4.68 years), coming as close as 2.09 AU and reaching as far as 3.50 AU from the sun.

Kleopatra is about 122.0 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. state of Connecticut.The rotation of Kleopatra has been observed. It completes a rotation on its axis every 5.39 hours.

Kleopatra's orbit is 1.10 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times. Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth."

"216 Kleopatra is a large M-type asteroid with a mean diameter of 120 kilometers (75 miles) and is noted for its elongate bone or dumbbell shape. It was discovered on 10 April 1880 by Austrian astronomer Johann Palisa at the Austrian Naval Pola Observatory, in what is now Pula, Croatia, and was named after Cleopatra, the famous Egyptian queen.

In September 2008, Franck Marchis and his collaborators announced that by using the Keck Observatory's adaptive optics system, they had discovered two moons orbiting Kleopatra. In February 2011, the minor-planet moons were named Alexhelios and Cleoselene, after Cleopatra's children Alexander Helios and Cleopatra Selene. The outer and inner satellites are about 8.9 and 6.9 km in diameter, with periods of 2.7 and 1.8 days, respectively.

One possible origin that explains Kleopatra's shape, rotation, and moons is that it was created by an oblique impact perhaps 100 million years ago. The increased rotation would have elongated the asteroid and caused Alexhelios to split off. Cleoselene may have split off later, around 10 million years ago. Kleopatra is a contact binary – if it were spinning much faster, the two lobes would separate from each other, making a true binary system.

https://en.wikipedia.org/wiki/216_Kleopatra
https://www.spacereference.org/asteroid/216-kleopatra-a880-gb

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