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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 ...
M. E. Brown estimates that is very likely a dwarf planet. [9] A diameter of 680 ± 34 km has been determined from combined observations of the Herschel and Spitzer space telescopes. [ 5 ] Tancredi notes that light-curve-amplitude analysis shows only small deviations, suggesting that (90568) 2004 GV 9 could be a spheroid with small albedo spots ...
The concept of human exploration of dwarf planets has intrigued scientists since Pluto's discovery in 1930. Despite the vast distances and significant challenges, advancements in space technology could make such endeavors possible. Colonizing dwarf planets offers potential economic benefits due to the presence of rare and valuable ores. [23]
The planet KMT-2020-BLG-0414Lb is close in mass to Earth and is one of the least massive exoplanets detected by microlensing. [2] It is about twice as far from its star as Earth is from the Sun. The second companion, KMT-2020-BLG-0414Lc, is a brown dwarf about 30 times the mass of Jupiter .
Huya was considered to be a possible dwarf planet due to its presumed high brightness, which corresponds to a large diameter. [ 47 ] [ 52 ] Astronomer Gonzalo Tancredi considered Huya as a possible dwarf planet with an estimated diameter larger than 450 km (280 mi), the suggested minimum size for icy objects to maintain a spheroidal shape.
Along with the similar orbits of other distant trans-Neptunian objects, the orbit of Leleākūhonua suggests, but does not prove, the existence of a hypothetical Planet Nine in the outer Solar System. [5] [12] As of 2019, the object is inbound 78 AU from the Sun; [9] about two-and-a-half times farther out than Pluto's current location. [13]
The newly-found ETNO joins Sedna, a dwarf planet believed to be about 250 AU from the sun, as objects residing outside the Kuiper Belt, where Pluto resides, according to Space.
2014 UZ 224 is a trans-Neptunian object and possible dwarf planet orbiting in the scattered disc of the outermost Solar System. As of 2021, it is approximately 89.7 AU (13.42 billion km) from the Sun, and will slowly decrease in distance until it reaches its perihelion of 38 AU in 2142.