Col-OSSOS: Colors of the Interstellar Planetesimal 1I/`Oumuamua
Michele T. Bannister, Megan E. Schwamb, Wesley C. Fraser, Michael, Marsset, Alan Fitzsimmons, Susan D. Benecchi, Pedro Lacerda, Rosemary E., Pike, J.J. Kavelaars, Adam B. Smith, Sunny O. Stewart, Shiang-Yu Wang,, Matthew J. Lehner

TL;DR
This study presents detailed optical and near-infrared observations of interstellar object 1I/`Oumuamua, revealing its rotation, elongated shape, and surface colors, providing insights into its origin and properties.
Contribution
First comprehensive color and variability analysis of 1I/`Oumuamua using high-precision photometry, linking its surface properties to Solar System small bodies.
Findings
1I/`Oumuamua has a rotation period of about 8.1 hours.
It is a highly elongated body with an axial ratio of at least 5.3:1.
Its surface colors are similar to some Kuiper belt objects and Jupiter Trojans.
Abstract
The recent discovery by Pan-STARRS1 of 1I/2017 U1 (`Oumuamua), on an unbound and hyperbolic orbit, offers a rare opportunity to explore the planetary formation processes of other stars, and the effect of the interstellar environment on a planetesimal surface. 1I/`Oumuamua's close encounter with the inner Solar System in 2017 October was a unique chance to make observations matching those used to characterize the small-body populations of our own Solar System. We present near-simultaneous g, r, and J photometry and colors of 1I/`Oumuamua from the 8.1-m Frederick C. Gillett Gemini North Telescope, and photometry from the 4.2 m William Herschel Telescope. Our grJ observations are directly comparable to those from the high-precision Colours of the Outer Solar System Origins Survey (Col-OSSOS), which offer unique diagnostic information for…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
