2016 WF9 asteroid
2016 WF9 est considéré, as of 30 Décembre 2016, an Apollo
astéroïde (NÉO, PHA) by JPL and the IAU Minor Planet Center (MPC).
The object is somewhat dark, possibly a comet, but without comet-like
dust and gas cloud, that was detected on 27 Novembre 2016 by NEOWISE, the asteroid-and-comet-hunting portion
of the Wide-Field Infrared Survey Explorer (WISE) mission.
According to NEOWISE, 2016 WF9 could have cometary
origins. This object illustrates that the boundary between asteroids and comets is a blurry one; perhaps over
time this object has lost the majority of the volatiles that linger on or just under its surface. 2016 WF9,
à propos 0.51.0 kilomètres (0.310.62 mi) across, est “relatively large”, according to NASA.The object will pass Earth on
25 Février 2017 at a distance of nearly 51,000,000 kilomètres (32,000,000 mi) and is not considered a threat for the foreseeable future.
A simulation of 2016 WF9‘s dynamics over a period of 100 million days (~274,000 years)
found that it had roughly a 60% chance of originating from the outer solar system as a long-period comet.
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