An american team of researchers has discovered a celestial body that is two and a half times farther from the Sun than Pluto, at the edge of the Solar System, according to a study published in the journal Astronomical Journal.
The new object found, called 2015 TG387, has an orbit which suggests the existence of a planet even more distant and larger, although it has not yet been demonstrated, according to one of the principal authors, Chad Trujillo, of the University of North Arizona (USA).
The 2015 TG387 was discovered about 80 astronomical units (AU) from the Sun, a measure is defined as the distance between the Earth and this star. Among astronomers it is known as Goblin , because the first time I saw it coincided with the holiday of Halloween 2015.
To put these data in context, Pluto is located at around 34 AU, so that 2015 TG387 is at this time approximately two and a half times farther from the Sun than the dwarf planet.
“The new object is in an orbit very elongated and never gets closer to the Sun, that is to say, is at a point called perihelion, situated around 65 UA. Only 2012 VP113 and Sedna, 80, and 76 AU, respectively, have an orbit more distant,” described the researchers.
However, although the TG387 2015 has the third perihelion more distant, their axis orbital is larger than that of 2012 VP113 and Sedna, which means that he travels “a lot farther from the Sun than them”, reaching up to approximately 2300 AU at its furthest point.
In this way, 2015 TG387 has become one of the few known objects that never gets close enough to the giant planets of the Solar System, Neptune and Jupiter, to have gravitational interactions significant with them.
“These objects are isolated from the greater part of the known mass of the Solar System, which makes them immensely interesting,” explained another of the principal investigators, Scott Sheppard of the Carnegie Institution for Science.
The object was discovered as part of the search for dwarf planets unknown and the Planet X, also known as “Planet Nine”, a world not yet discovered that could have a mass about 10 times greater than that of the Earth.
According to NASA, “the existence of this distant world is only theoretical at this point and have not made a direct observation of the object.”
“What makes this result is really interesting is that the Planet X seem to affect the TG387 2015 in the same way that all the other objects in the Solar System to extremely distant. These simulations do not demonstrate that there is another massive planet in our Solar System, but are further evidence that something big could be out there, “concluded Trujillo.