Specific information about Ka Rong.

Ka Rong (Ka Rong)-Ka Rong, a satellite of Pluto, also known as Ka Rong, was discovered in 1978. Ka Rong, a servant of Pluto in Roman mythology, asked the dead for money to row a boat across the Styx for them. In 2005, two more moons of Pluto were discovered: Demetrius II (Knicks) and Demetrius III (Xu Dela). According to the current definition, Phobos may be the largest satellite of Pluto, or it may form a twin dwarf planet with Pluto. The New Horizon mission is scheduled to visit Pluto and Ka Rong on 20 15. Ka Rong's name is easily confused with Kay Long Xing (2060), another small celestial body in the solar system. Ka Rong, the discovery of Pluto, was discovered by astronomer Jim Christy at1June 22nd, 978, when he examined a group of photographic negatives of Pluto a month ago with a high magnification magnifying glass. Christie noticed that a tiny bump would appear periodically. Later, on April 29th, 1965, the negative film also confirmed this bulge. Ka Rong edited the name of Ka Rong in this paragraph. The initial temporary names of Pluto and Charon I in Ka Rong were S/ 1978 P 1, which were given according to the new naming rules formulated by the General Assembly at that time. Later, Christie called it "Ka Rong", but it was not until 1985 that the International Astronomical Union recognized this name as an official name. In Greek mythology, Ka Rong was the ferryman of the deceased, and he was closely related to Hades (the Pluto in Roman mythology) in the myth map. Although in the traditional English pronunciation, the myth map shows a hard K sound, but Christie changed the pronunciation of ch to the pronunciation of this satellite. Later, his wife, Charlene Marilynn Dangelo, was nicknamed "Char". The pronunciation of sh became popular in astronomy, and everyone used it as usual. In European languages except English, mythical pronunciation and ch pronunciation are still used. Robin Kanji, the editor of this paragraph, simulated the formation of Pluto-Moon. The results, published in 2005, show that Ka Rong was formed in a big collision about 4.5 billion years ago, which is very similar to the situation of the earth and the moon. In this model, a huge Cooper-belt celestial body collides with Pluto at high speed, self-destructs and blows away most of Pluto's mantle, and the Ka Rong is formed by these fragments. However, such an impact should make Pluto more rocky than we found, and Ka Rong will have more ice. Therefore, it is now considered that Pluto and Ka Rong were two different celestial bodies before they collided in orbit. Although the collision is fierce, it can only evaporate ice like methane, which is not enough to lead to disintegration. Edit the physical properties of Pluto in this paragraph. The diameter of Ka Rong is about 65,438+0,265,438+02 kilometers (750 miles), which is exactly half that of Pluto. Its surface area is about | 4,580,000 km2, and the surface is covered with frozen nitrogen and methane. Unlike Pluto, the surface of Ka Rong may look like frozen water. Ka Rong has a surface temperature of about -230℃ and a density of1.63g/cm3. It shows that rocks account for more than half, while ice is slightly less than half. Its surface atmosphere is only about 0. 1 millibar, which is one tenth of the atmospheric concentration on the earth's surface, and it is almost zero. At present, scientists are trying to study the surface of Phobos to determine whether this satellite has an atmosphere. Edit the orbital characteristics of Pluto and Ka Rong, and confirm that the luminosity changes are in the mutual concealment period. Pluto and Ka Rong are in the state of tidal locking, circling each other with a period of 6.387 days, so they are always in the same position. The average distance between them is 19570 km (12, 163 miles). Ka Rong's discovery enabled astronomers to accurately measure the total mass of Pluto system, and their respective sizes (diameters) can be calculated by shielding each other, but only the individual mass can be estimated. It was not until the discovery of satellites other than Pluto in 2005 that the mass of Ka Rong was about 1 1.65% of Pluto's, and the density was also shown as1.65 0.05. It is suggested that 55.5% is "rock" and 45% is ice. Pluto has a high density, about 70% "rock". Edit this satellite or dwarf planet Pluto-Ka Rong's center of mass falls outside these two celestial bodies, so one of them does not really orbit the other, and the masses of the two can be compared with each other, so Ka Rong is not suitable to be regarded as a satellite of Pluto. It should be a twin dwarf planet and should be reclassified with Pluto. At the annual meeting of the International Astronomical Union, there was a draft for redefining the planet in 2006, proposing that the planet must revolve around the sun and have enough gravity to make itself a sphere. Under such a draft, Ka Rong is eligible to become a planet, because the draft clearly defines satellites as a condition, that is, the center of gravity of the system must be inside the main celestial body. However, in the final reclassification, Pluto was classified as a dwarf planet, but there was no satellite to formally define this planet, which made Ka Rong's identity very unclear. (So far, Ka Rong has not been included in the list of dwarf planets approved by the International Astronomical Union. According to the planetary standard of the International Astronomical Union, in a multi-celestial system revolving around a star, if the main celestial body is a planet, then the sub-celestial body is also spherical. If certain conditions are met, it can also be called a planet, that is, the center of gravity between the main celestial body and the sub-celestial body is not inside the main celestial body. So Ka Rong meets this requirement. Pluto -2 (Knicks) and Pluto -3 also revolve around the same center of gravity, but they are not as big as spheres, so they are easily identified as satellites of Pluto. (Or another point of view, the satellite of Pluto-Ka Rong system) Editing the relevant data of this paragraph An international research team recently completed the data estimation of the outermost satellite of the solar system, and concluded that the satellite is composed of ice and rocks, and there is no air. The research report was published in the latest issue of Nature on June 5, 2006. Phobos was discovered in 1978. It is located at the extreme edge of the solar system and is the only satellite of Pluto discovered so far. Phobos runs in an orbit less than 20 thousand kilometers from Pluto, and the distance between them is so close that some scientists even think that they form a binary star system instead of a planet and a satellite. In July 2005, Phobos experienced the only occultation in the past 25 years. In this process, Pluto passes through the atmosphere of the star, and its light darkens and is reflected. Scientists took advantage of this excellent opportunity to observe Pluto through the telescope of the European Southern Observatory in Chile. Observation data show that Phobos' density is 1.7 times that of water, so it can be concluded that Phobos is an ice body, and rocks account for half of its volume. The results of this study show that Pluto and Pluto have the same composition, which supports the speculation that the former may be formed by the latter colliding with a large celestial body, and explains why they are so close. Scientists have also calculated other data of Phobos more accurately. The diameter of Phobos is between 1206 km and 12 12 km, which is about half that of Pluto. NASA's plan to explore Pluto will be launched in the middle of this month, and the $700 million New Horizon probe will take nine years to complete the journey from Earth to Pluto.