The asteroid reflects ten times more light.
After analyzing the data from the Spitzer telescope, astronomers found that the first interstellar object – the Omoloy asteroid – was nearly twice what they had previously thought. The study is published in the journal Astronomical Journal.
Asteroid 1I / Omwamwi was found in October 2017. At first it was considered a comet, but then the astronomers agreed on his opinion that he is an asteroid with an unusual shaped cigar. According to previous data, which scientists have been using the Pan-STARRS telescopes 1, Hubble and others expect, Omwamwi length can be no more than 800 meters. To get new information about this, NASA astronomers in November 2017 had pointed to an infrared infrared specter telescope.
But within two months the telescope was unable to repair traces of Omwamwi. On this basis, astronomers have come to the conclusion that the size of the asteroid is far less than those that can "see" Spitzer. To assess the size of Omwamwi, scientists have decided using three independent models to find out the maximum dimensions of objects that can repair the telescope. They received the results of 100, 140 and 440 meters – that is, Spitzer would see any object with a maximal dimension ranging from 100 to 440 meters. Therefore, it is within these limits, and is the length of classification in the form of Omwamwi.
In addition, astronomers have discovered that the asteroid reflects ten times more light than flying to the comet's solar system. This conclusion researchers made due to the temperature Omwamwi: smaller, more light and reflective heat.