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Makemake [e] (minor-planet designation: 136472 Makemake) is a dwarf planet and the largest of what is known as the classical population of Kuiper belt objects, [b] with a diameter approximately that of Saturn's moon Iapetus, or 60% that of Pluto. [24] [25] It has one known satellite. [26]
S/2015 (136472) 1, unofficially nicknamed MK2 by the discovery team, [2] is the only known moon of the trans-Neptunian dwarf planet Makemake. [1] [4] It is estimated to be 175 km (110 mi) in diameter and has a semi-major axis of at least 21,000 km (13,000 mi) from Makemake. [1] Its orbital period is at least 12 days if it has a circular orbit.
(42301) 2001 UR 163 (provisional designation 2001 UR 163) is a resonant trans-Neptunian object and possible dwarf planet located in the outermost region of the Solar System.The object measures approximately 352 kilometers (220 miles) in diameter with a high albedo and stays in an uncommon orbital resonance with Neptune.
For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure. [ 11 ] Because Sedna and 2002 MS 4 have no known moons, directly determining their mass is impossible without sending a probe (estimated to be from 1.7x10 21 to 6.1×10 21 kg for Sedna [ 12 ] ).
The number of dwarf planets in the Solar System is unknown. Estimates have run as high as 200 in the Kuiper belt [1] and over 10,000 in the region beyond. [2] However, consideration of the surprisingly low densities of many large trans-Neptunian objects, as well as spectroscopic analysis of their surfaces, suggests that the number of dwarf planets may be much lower, perhaps only nine among ...
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As far as anyone can tell, Image:Makemake precovery.jpg is the only photograph of makemake on the internet at all. Regardless, any images not taken by NASA would be copyrighted by the observatory from which they were taken, and it doesn't appear that NASA has imaged this planet dwarf planet yet (as strange as that seems).
The newly-discovered thick atmosphere gives the planets another thing in common. ... Are we about to find the evasive Planet 9? GJ 1132b orbits around the dwarf star GJ 1132 about 39 light-years ...