1I/2017 U1 (Oumuamua) Might Be A Cometary Nucleus
“1I/2017 U1 (Oumuamua) Might Be A Cometary Nucleus”
Ignacio Ferrín, Jorge Zuluaga Solar, Earth and Planetary Physics Group & Computational Physics and Astrophysics Group (FACom) Institute of Physics, University of Antioquia Medellin, Colombia [email protected] With the detection of an extra-solar object discovered by the Panstarrs telescope on October 18 th Conclusion.
The facts: a) both independent datasets agree, b) the three data points lie on the MS, c) the data point with the smallest error lies almost at the center of the distribution, and d) the same result is found in the B-V vs V-R as in the R-I vs B-V diagrams, point to the conclusion that 1I/2017 U1 might be a cometary nucleus. ACKNOWLEDGEMENTS
The
FACom group is supported by the project “Estrategia de Sostenibilidad 2015 - 2016", sponsored by the Vicerectoría de Investigación of the Universidad of Antioquia, Medellín, Colombia.
REFERENCES - Bannister, M. T. et al., 2017. https://arxiv.org/pdf/1711.06214.pdf - Bolin, B. T. et al., 2017. https://arxiv.org/pdf/1711.04927.pdf - Chonis, T. S., Gaskell, C. M., 2008. An. J., 135, 264-267 - Ferrín, I., 2006. Icarus, 185, 523-543. - Ferrín, I., Pérez, M., Rendón, J., 2017. PSS, 137, 52-63. - Jewitt, D., et al., 2017. https://arxiv.org/pdf/1711.05687.pdf - Knight, M., et al., 2017. https://arxiv.org/ftp/arxiv/papers/1711/1711.01402.pdf - Meech, K., 2017. MPC 2017-U183. - Zuluaga, J. I. et al., 2017. To appear in Physics Arxive.org.
Figure 1a).
The color-color diagram for cometary nuclei. a) B-V vs V-R. The nuclei are located inside an irregular ellipsoid, but 70% of them lie on a tilted line we call *the main sequence of cometary nuclei colors*, MS. Notice that the two measurements of the colors of 1I/2017 U1 by Jewitt et al. (2017) and Bolin et al. (2017), lie on top of the MS. Notice the large error bars of Bolin et al. (2017) data and the small error bars of Jewitt et al. (2017). The black dot represents the centroid of the distribution. The centroid lies inside the error bars of the Jewitt et al. data point.