NASAのインスタグラム(nasa) - 9月22日 06時49分

An unusual object in the asteroid belt is, in fact, two asteroids orbiting each other that have comet-like features. These include a bright halo of material, called a coma, and a long tail of dust. This time-lapse, assembled from a set of Hubble Space Telescope photos, reveals the asteroid pair, called 2006 VW139/288P.
The pair is orbiting each other at a distance of 60 miles and was imaged in September 2016. The more recent Hubble observations revealed ongoing activity in the binary system. We detected strong indications for the sublimation of water ice due to the increased solar heating – similar to how the tail of a comet is created.
The team estimates that 2006 VW139/288P has existed as a binary system only for about 5,000 years. The most probably formation scenario is the breakup due to fast rotation.
Credit: NASA, ESA, and J. DePasquale and Z Levay (STScI)
#nasa #space #hubble #hubblespacetelescope #telescope #binary #asteroids #orbit #sun #timelapse #gif #astronomy #solarsystem

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