Oumuamua, First celestial body visited our solar system
Oumuamua was the first interstellar object came to out solar system. 1I/2017 U1 ‘Oumuamua, was discovered Oct. 19, 2017 by the University of Hawaii’s Pan-STARRS1 telescope, funded by NASA’s Near-Earth Object Observations (NEOO) Program.
The relative motion between ‘Oumuamua and the sun reflects the motion of the sun relative to the LSR. ‘Oumuamua is like a buoy sitting at rest on the surface of the ocean, with the solar system running into it like a fast ship.
What does Oumuamua look like?
Picture a cigar floating through space, and you’ve got the right idea.
Oumuamua passed too far from Earth to appear as anything more than a dot through even the biggest telescopes. But the way its light brightened and then dimmed indicated a stretched-out shape — at least seven times as long as it is wide, Meech estimated — and it’s small, no more than 3,000 feet by 400 feet. The object tumbles as it goes, completing one full flip about every eight hours.
Despite the many realistic-looking illustrations you might have seen of Oumuamua, astronomers have no idea about what it looks like up close — although evidence suggests it has a reddish surface.
Oumuamua Got its Name
It was officially named 1I/2017 U1 by the International Astronomical Union (IAU), which is responsible for granting official names to bodies in the solar system and beyond. In addition to the technical name, the Pan-STARRS team dubbed it ‘Oumuamua (pronounced oh MOO-uh MOO-uh), which is Hawaiian for “a messenger from afar arriving first.”