  On January 1st 2019, the New Horizons spacecraft flew by the classical Kuiper
belt object (486958) Arrokoth (provisionally designated 2014 MU69), possibly
the most primitive object ever explored by a spacecraft. The I/F of Arrokoth is
analyzed and fit with a photometric function that is a linear combination of
the Lommel-Seeliger (lunar) and Lambert photometric functions. Arrokoth has a
geometric albedo of p_V = 0.21_(-0.04)^(+0.05) at a wavelength of 550 nm and
~0.24 at 610 nm. Arrokoth's geometric albedo is greater than the median but
consistent with a distribution of cold classical Kuiper belt objects whose
geometric albedos were determined by fitting a thermal model to radiometric
observations. Thus, Arrokoth's geometric albedo adds to the orbital and
spectral evidence that it is a cold classical Kuiper belt object. Maps of the
normal reflectance and hemispherical albedo of Arrokoth are presented. The
normal reflectance of Arrokoth's surface varies with location, ranging from
~0.10-0.40 at 610 nm with an approximately Gaussian distribution. Both
Arrokoth's extrema dark and extrema bright surfaces are correlated to
topographic depressions. Arrokoth has a bilobate shape and the two lobes have
similar normal reflectance distributions: both are approximately Gaussian, peak
at ~0.25 at 610 nm, and range from ~0.10-0.40, which is consistent with
co-formation and co-evolution of the two lobes. The hemispherical albedo of
Arrokoth varies substantially with both incidence angle and location, the
average hemispherical albedo at 610 nm is 0.063 +/- 0.015. The Bond albedo of
Arrokoth at 610 nm is 0.062 +/- 0.015.
