What is the name of the first interstellar object ever ? What is oumuamua?

Oumuamua is the first known interstellar object detected passing through solar system. Formally designation by 1l/2017 U1 , it was discovered by Robert weryk using the Pan-STARRS telescope at Haleakala Observatory,Hawaii on 19th October 2017. It is a small object estimated to be between 100 and 1000m long, with it's width and thickness both estimated to range between 35 and 167m.

Extrapolated and without further deceleration the path of oumuamua cannot be captured in the solar system. Oumuamua's planetary system of excursion are unknown. In July 2019, astronomers reported that Oumuamua is an object of purely natural origin.

Hydrogen ice theoryEdit

It has been proposed that `Oumuamua contains a significant amount of hydrogen ice.This would point to it originating from the core of an interstellar molecular cloud, where conditions for the formation of this material might exist. The sun's heat would cause the hydrogen to sublimate, which would in turn propel the body. The hydrogen coma formed by this process would be difficult to detect from Earth-based telescopes, as the atmosphere blocks those wavelengths. Regular water-ice comets undergo this as well, however to a much lesser extent and with a visible coma. This may explain the significant non-gravitational acceleration that `Oumuamua underwent without showing signs of coma formation. Significant mass loss caused by the sublimation would also explain the unusual cigar-like shape, comparable to how a bar of soap will always become more elongated as it is used up.