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The Hubble Space Telescope (HST) measured the colors of eight Kuiper BeltObjects (KBOs) that will be observed by the New Horizons spacecraft includingits 2019 close fly-by target the Cold Classical KBO (486958) 2014 MU69. We findthat the photometric colors of all eight objects are red, typical of the ColdClassical dynamical population within which most reside. Because 2014 MU69 hasa similar color to that of other KBOs in the Cold Classical region of theKuiper Belt, it may be possible to use the upcoming high-resolution NewHorizons observations of 2014 MU69 to draw conclusions about the greater ColdClassical population. Additionally, HST found none of these KBOs to be binarywithin separations of ~0.06 arcsec (~2000 km at 44 AU range) and {\Delta}m lessthan or equal to 0.5. This conclusion is consistent with the lower fraction ofbinaries found at relatively wide separations. A few objects appear to havesignificant photometric variability, but our observations are not of sufficientsignal-to-noise or time duration for further interpretation.

The Color and Binarity of (486958) 2014 MU69 and Other Long-Range New Horizons Kuiper Belt Targets