The Moon of Makemake
The moon of Makemake, temporarily
(136472) 1 and nicknamed MK 2 (MK2), is small without the mass/self-gravity necessary to
assume a spherical shape.
in April 2015 by the team of Alex Parker, Marc Buie, Will Grundy and
Noll, using the Hubble Space Telescope's Wide Field Camera 3 (WFC3) led
to the moon's discovery. Details (preliminary) were released to
the astronomical community on 26 April, 2016, via the Minor Planet
Electronic Circulars (MPECs).
Parker of Southwest Research Institute, Boulder, Colorado, leader of
the team that analyzed the Hubble images, said the orbit of MK 2
Makemake) appears to be aligned edge-on to Earth.
 This along with MK 2's diameter of only 160 km (100 mi) and its
poor reflectivity (it's the color
of charcoal) makes observation/analysis difficult—more so when
you factor in the close proximity (21,000 km) and glare of its icy
companion. (Makemake is currently visually the second brightest known
object in the Kuiper
belt,  thirteen hundred times brighter than MK 2.)
observations are needed and could be scheduled as early as this summer
but early next year is
 The shape of the moon's orbit can help determine its origin. A
tight circular orbit leans toward a collision (between Makemake and a KBO), a wide elongated orbit
leans toward capture (of a KBO).
 The Kuiper belt is a region of the outer Solar
populated by billions of rock-ice objects. It reaches from
(30 AU) outward to approximately 55 AU.
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