Core Viewpoint - An unidentified object, possibly from another star system, has been detected in the solar system, marking it as the third known "interstellar visitor" [1][2] Group 1: Object Characteristics - The object, designated A11pI3Z, is located between the asteroid belt and Jupiter, several hundred million kilometers from Earth [1] - Its exact nature remains uncertain; researchers are unable to determine if it is a rocky asteroid or a comet composed of rock, ice, and dust [2] - The estimated width of A11pI3Z is around 40 kilometers according to Spanish astrophysicist Josép Trigo Rodríguez, while Harvard astrophysicist Avi Loeb suggests it could be about 19 kilometers wide [2] Group 2: Comparison with Previous Interstellar Visitors - The first known interstellar visitor, 'Oumuamua', discovered in October 2017, is a cigar-shaped object approximately 400 meters long [2] - If A11pI3Z is confirmed to be 19 kilometers wide, its mass would be 10 million times that of 'Oumuamua' [2] - The second interstellar visitor, 21/Borisov, discovered in 2019, is identified as a comet [2]