# Interstellar Interloper 1I/2017 U1: Observations from the NOT and WIYN Telescopes

@article{Jewitt2017InterstellarI1,
title={Interstellar Interloper 1I/2017 U1: Observations from the NOT and WIYN Telescopes},
author={David C. Jewitt and Jane X. Luu and Jayadev Rajagopal and Ralf Kotulla and Susan E. Ridgway and Wilson M. Liu and Thomas Augusteijn},
journal={arXiv: Earth and Planetary Astrophysics},
year={2017}
}
• Published 15 November 2017
• Physics, Geology
• arXiv: Earth and Planetary Astrophysics
We present observations of the interstellar interloper 1I/2017 U1 ('Oumuamua) taken during its 2017 October flyby of Earth. The optical colors B-V = 0.70$\pm$0.06, V-R = 0.45$\pm$0.05, overlap those of the D-type Jovian Trojan asteroids and are incompatible with the ultrared objects which are abundant in the Kuiper belt. With a mean absolute magnitude $H_V$ = 22.95 and assuming a geometric albedo $p_V$ = 0.1, we find an average radius of 55 m. No coma is apparent; we deduce a limit to the dust…
96 Citations

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