The International Astronomical Union has designated the provisional name of 2018 AG37 An object nicknamed “Expedition” (very far away) is located at a recorded distance of 132 times the recorded distance between the sun and the earth, as confirmed by the Gemini Telescope in Hawaii (USA) and the Magellan Telescope in Chile. For comparison, Pluto is 39 times or astronomical units.
In January 2018, a group of astronomers observed Subaru Telescope An object located on Mauna Kea in Hawaii, USA Far far away (‘Far away‘(English), but they are not sure how far away. More observations are needed to determine it.
“At the time we didn’t know the orbit of the object because we only discovered Subaru’s discovery in 24 hours, but it would take years of observation to confirm the object’s orbit around the sun,” the co-discoverer explained. Scott Sheppard From the Carnegie Institute of America.
Shepard and his colleagues, David Tholen From the University of Hawaii and Chad Trujillo Scientists from Northern Arizona University observed the object with a telescope in the next few years Gemini North At Mauna Kea and Magellan Telescope The location of the Carnegie Institute in Chile to determine its orbit.
They have now confirmed that Farfarout is currently located at 132 astronomical units (au) The distance from the sun, which is equivalent to 132 times the distance from our star to the earth. In comparison, Pluto is 39 au from the sun on average.
Farfarout is farther than the previous distance record holder in the solar system: Far away (far away), Because it is 124 au from the sun, it was discovered by the same team and temporarily designated as 2018 VG18 years old.
Distance to Farfarout and other objects in the solar system. / NOIRLab / NSF / AURA / J. Da Silva
However, according to astronomers’ calculations, Farfarout’s orbit is quite long, 175 to From the sun to the farthest place 27 to At the closest location, within the orbit of Neptune. Farfarout can provide insight into the history of the outer solar system when objects from distant celestial bodies pass over this gas giant’s celestial body.
Trujillo said: “The long distance is likely to cause distant galaxies to be thrown out of the solar system,” Trujillo said, “Because their orbits still intersect, it is likely to have a strong interaction with the planet again in the future. .”
400 km wide object
Farfarout is very weak. Based on its brightness and distance from the sun, the research team estimated its width to be about 400 kilometers, which puts it at the lower limit to consider. Dwarf planet Provided by the International Astronomical Union (IAU).
This UAE Asteroid Center And Massachusetts Announced this week Farfarout already has a temporary name Joint-stock company in 201837. After more observations are collected, the most distant known object in the solar system will now receive an official name, and its orbit will be better defined in the next few years.
“Farfarout tarda Around the sun for a thousand years“Explained Tholen”, therefore, it moves very slowly in the sky and requires years of observation to accurately determine its trajectory.
The discoverer of Farfarout uses the Gemini telescope Knoll Laboratories (NSF-AURA) and other instruments are confident to find more distant objects in the far part of the solar system, and their distance records may not last long.
Sheppard concluded: “With the latest developments in digital cameras in very large telescopes, such distant objects can be effectively discovered-Sheppard concluded-although some objects are large, the size of dwarf planets is very small. It is because of their short distance from the sun. Just the tip of the iceberg Objects that may be within the confines of the solar system”.