ʻOumuamua is the first interstellar object that we know has passed through our solar system. Oumuamua was first discovered on 19 October 2017 using the Pan-STARRS1 telescope at the Haleakala Observatory in Hawaii.
Its appearance is long and narrow, and it had a dark red color, similar to objects in the outer Solar System.
References[change | change source]
- Gareth V. Williams (November 6, 2017). "MPEC 2017-V17: New Designation Scheme for Interstellar Objects". minorplanetcenter.net.
- Karen Northon (June 27, 2018). "Our Solar System's first known interstellar object gets unexpected speed boost". nasa.gov.
- Karen J. Meech et al (November 1, 2017). "Discovery and characterization of the first known interstellar object". Nature. https://www.eso.org/public/archives/releases/sciencepapers/eso1737/eso1737a.pdf.