Oct 28, 2019

The 2019 UB8 2019-10-29 Flyby! How Close? Is Close?

(2019 UB8) approximate (0.50 LD) flyby distance from Earth
This image adapted by Steven M Tilley from the image the original
Earth-Moon.png by Nickshanks
 under licensed under the
Creative Commons Attribution 2.5 Generic license
Tonight(2019-Oct-28/29) the NEO 2019 UB8 (4.4 m - 9.7 m) will do a flyby(A.K.A NEO Earth Close Approaches) of a Nominal Distance of 0.50 LD (0.00127 AU) ~191,000 KM (~ 119,000 miles). Sorting by nominal distance, this close approach is listed in the top 270 of 22,500+ entries in JPL's close approach database. (As of 2019-Oct-28) Flybys within one LD are quite common from what we "know" NEOs flybys within one LD a few times every week or so.

If  the Earth was the size of a basketball  how far would the Moon be?
What is Close

Close is a relative term. "Close" to a major sports venue is not the same as "close" to the ER. If one were to think of a basketball-size Earth, it may in understanding what is "close" and what is "far." In this, basketball-size Earth system, the ISS would be at ~0.76 CM (0.3 inches); we had NEO Flybys at 10.35 CM (4.1 inches) [ 2011 CQ1 on 2011-Feb-04] before. The Moon would range from ~673.41 CM (~22.0 Ft) to ~753.81 CM (~24.7 Ft). 2019 UB8 will be ~347.62 CM (~11.4 Ft) from the basketball. To see 2019 UB8 tonight, check out the Virtual Telescope Project.

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