Moon orbiting solar system’s third largest dwarf planet found
Scientists have discovered a new moon orbiting the third largest dwarf planet, found on the frosty outskirts of our solar system. With this discovery, it seems that the more known dwarf planets in the Kuiper belt more than 965 km have companions. These bodies can give an idea of how the moons form in the young solar system.
The combined power of three space observatories, including NASA’s Hubble Space Telescope, helped discover the moon in orbit around the dwarf planet 2007 OR10 in the Kuiper Belt, a field of frozen debris left by the formation of our solar system , Which took place around 4.6 billion years ago.
Collisions and moons
“The discovery of satellites around the main known dwarf planets, with the exception of Sedna means that when these bodies were formed, there are billions of years, collisions must have been more frequent, which is a constraint on training models “Said Csaba Kiss of the Konkoly Observatory in Hungary. “If there were frequent collisions, it was fairly easy to train these satellites,” said Dr. Kiss, lead author of the study published in The Astrophysical Journal Letters. The objects most likely to have collapsed. Often because they lived in a busy area.
The team discovered the moon in the images from the 2007 OR10 files taken by the Hubble telescope.
Observations made on the dwarf planet by NASA’s first Kepler space telescope astronomers reported the possibility of the moon that was circling. Kepler showed that 2007 OR10 has a slow rotation period of 45 hours. “The typical rotation periods of Kuiper belt objects are less than 24 hours,” Dr. Kiss said.
“We looked at the Hubble file for the slowest rotation period could have been caused by the moon’s gravitational weapon. The initial investigator missed the moon in the Hubble images because it is very weak” -t he said. Astronomers spotted the moon in two separate Hubble observations a year apart. The images show the moon is gravitationally linked to 2007 OR10 as it moves with the dwarf planet, seen on a background of stars. Astronomers have calculated the diameters of the two objects based on far-infrared light observations by the Herschel Space Observatory, which measured the thermal emission of distant worlds.
The dwarf planet is about 1 518 km, and the moon is estimated at 240 km 400 km in diameter. 2007 OR10, like Pluto, follows an eccentric orbit, but is currently three times as far away as Pluto from the sun. 2007 OR10 is a member of an exclusive club of the new dwarf planets. Among these bodies, only Pluto and Eris are superior to 2007 OR10. It was discovered in 2007 by astronomers Meg Schwamb, Mike Brown and David Rabinowitz as part of a survey to find distant solar system bodies using the Samuel Oschin telescope at the Palomar Observatory in the United States.