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Pluto is the only trans-Neptunian object with a known atmosphere. [7] Its closest analog is the atmosphere of Triton, although in some aspects it resembles even the atmosphere of Mars. [8] [9] The atmosphere of Pluto has been studied since the 1980s by way of earth-based observation of occultations of stars by Pluto [10] [11] and spectroscopy. [12]
Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume, by a small margin, but is less massive than Eris.
The geography of Pluto refers to the study and mapping of physical features across the dwarf planet Pluto. On 14 July 2015, the New Horizons spacecraft became the first spacecraft to fly by Pluto. [ 1 ] [ 2 ] During its brief flyby, New Horizons made detailed geographical measurements and observations of Pluto and its moons .
Uncertainty parameter 2: Observation arc: 21.91 yr (8,002 days) Aphelion: 44.241 AU: ... In 2012 Arawn was hypothesized to be in a quasi-satellite loop around Pluto, ...
There are five climate zones on Pluto which are defined by the sub-solar latitude, [1] each with specific boundaries. However, the latitude ranges of the climate zones expand and shrink in response to the obliquity range of Pluto from a minimum of 103° to a maximum of 127° over the 2.8 million year oscillation period.
According to the Johnston's archive, 2017 OF 69 measures 533 kilometers in diameter assuming an albedo of 0.09 for the body's surface. [5]This makes 2017 OF 69 a notably large body for how late it has been discovered, being the fifth largest plutino in the Solar System, after Pluto, Orcus, 2003 AZ 84, and Ixion, and the largest discovered since Orcus in 2004.
Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI), is an instrument on the New Horizons space probe to Pluto and beyond, it is designed to measure ions and electrons. [1] Specifically, it is focused on measuring ions escaping from the atmosphere of Pluto during the 2015 flyby . [ 2 ]
Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info (181902) 1999 RD215 at the JPL Small-Body Database. Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters