Publication: Mini-moons from horseshoes: A physical characterization of 2022 NX1 with OSIRIS at the 10.4 m Gran Telescopio Canarias
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2023-02-02
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EDP Sciences
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Context. The near-Earth orbital space is shared by natural objects and space debris that can be temporarily captured in geocentric orbits. Short-term natural satellites are often called mini-moons. Reflectance spectroscopy can determine the true nature of transient satellites because the spectral signatures of spacecraft materials and near-Earth asteroids (NEAs) are different. The recently discovered object 2022 NX1 follows an Earth-like orbit that turns it into a recurrent but ephemeral Earth companion. It has been suggested that 2022 NX1 could have an artificial origin or be lunar ejecta.
Aims. Here, we use reflectance spectroscopy and N-body simulations to determine the nature and actual origin of 2022 NX1.
Methods. We carried out an observational study of 2022 NX1, using the OSIRIS camera spectrograph at the 10.4 m Gran Telescopio Canarias, to derive its spectral class. N-body simulations were also performed to investigate how it reached NEA space.
Results. The reflectance spectrum of 2022 NX1 is neither compatible with an artificial origin nor lunar ejecta; it is also different from the V type of the only other mini-moon with available spectroscopy, 2020 CD3. The visible spectrum of 2022 NX1 is consistent with that of a K-type asteroid, although it could also be classified as an Xk type. Considering typical values of the similar albedo of both K-type and Xk-type asteroids and its absolute magnitude, 2022 NX1 may have a size range of 5 to 15 m. We confirm that 2022 NX1 inhabits the rim of Earth’s co-orbital space, the 1:1 mean-motion resonance, and experiences recurrent co-orbital engagements of the horseshoe-type and mini-moon events.
Conclusions. The discovery of 2022 NX1 confirms that mini-moons can be larger than a few meters and also that they belong to a heterogeneous population in terms of surface composition.
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Reseñado en: Sacristán, Enrique. Una miniluna acompañará a la tierra durante las próximas décadas. Retrieved Feb 13, 2023, from https://www.agenciasinc.es/Noticias/Una-miniluna-acompanara-a-la-Tierra-durante-las-proximas-decadas
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Aarseth, S. J. 2003, Gravitational N-Body Simulations (Cambridge: Cambridge University Press), 27
Astropy Collaboration, Robitaille, T. P., Tollerud, E. J., et al. 2013, A&A, 558, A33
Astropy Collaboration, Price-Whelan, A. M., Sip˝ocz, B. M., et al. 2018, AJ, 156, 123
Bacci, P., Maestripieri, M., Grazia, M. D. 2022, Minor Planet Electronic Circulars, 2022-O04
Binzel, R. P., Perozzi, E., Rivkin, A. S., et al. 2004, Meteorit. Planet. Sci., 39, 351
Bolin, B., Jedicke, R., Granvik, M., et al. 2014, Icarus, 241, 280
Bolin, B. T., Fremling, C., Holt, T. R., et al. 2020, ApJ, 900, L45
Buzzoni, A., Altavilla, G., Fan, S., et al. 2019, Advances in Space Research, 63, 371
Cano, J. L., Ceccaroni, M., Faggioli, L., et al. 2019, ESA’s Activities on the Boundaries between NEO and Debris Detection, in 1st NEO and Debris Detection Conference, ed. T. Flohrer, R. Jehn, & F. Schmitz (ESA Space Safety Programme Office Publishing), 470
Carusi, A. & Valsecchi, G. B. 1979, Riunione della Societa Astronomica Italiana, 22, 181
Cepa, J., Aguiar, M., Escalera, V. G., et al. 2000, Proc. SPIE, 4008, 623
Cepa, J. 2010, Astrophysics and Space Science Proceedings, 14, 15
Cheng, A. F., Michel, P., Jutzi, M., et al. 2016, Planet. Space Sci., 121, 27
Cowardin, H. M., Hostetler, J. M., Murray, J. I., et al. 2021, Journal of the Astronautical Sciences, 68, 1186
de la Fuente Marcos, C. & de la Fuente Marcos, R. 2012, MNRAS, 427, 728
de la Fuente Marcos, C. & de la Fuente Marcos, R. 2016, MNRAS, 462, 3441
de la Fuente Marcos, C. & de la Fuente Marcos, R. 2018a, MNRAS, 473, 2939
de la Fuente Marcos, C. & de la Fuente Marcos, R. 2018b, MNRAS, 473, 3434
de la Fuente Marcos, C. & de la Fuente Marcos, R. 2020, MNRAS, 494, 1089
de la Fuente Marcos, C. & de la Fuente Marcos, R. 2022, Research Notes of the American Astronomical Society, 6, 160
de León, J., Licandro, J., Serra-Ricart, M., et al. 2010, A&A, 517, A23
DeMeo, F., Binzel, R. P., Slivan, S. M., et al. 2009, Icarus, 202, 160
Fedorets, G., Granvik, M., & Jedicke, R. 2017, Icarus, 285, 83
Fedorets, G., Micheli, M., Jedicke, R., et al. 2020, AJ, 160, 277
Ginsburg, A., Sip˝ocz, B. M., Brasseur, C. E., et al. 2019, AJ, 157, 98
Giorgini, J. 2011, in Journées Systèmes de Référence Spatio-temporels 2010, ed. N. Capitaine, 87–87
Giorgini, J. D. 2015, IAUGA, 22, 2256293
Granvik, M., Vaubaillon, J., & Jedicke, R. 2012, Icarus, 218, 262
Greenstreet, S., Ngo, H., & Gladman, B., 2012, Icarus, 217, 355
Jorgensen, K. M. 2000, Ph.D. Thesis, University of Colorado, Boulder
Jorgensen, K., Rivkin, A., Binzel, R., et al. 2003, American Astronomical Society, DPS meeting #35, id.36.02
Jorgensen, K., Africano, J., Hamada, K., et al. 2004, Advances in Space Research, 34, 1021
Kwiatkowski, T., Kryszczynska, A., Polinska, M., et al. 2009, A&A, 495, 967
Lecar, M., Franklin, F., & Murison, M. 1992, AJ, 104, 1230
Licandro, J., de la Fuente Marcos, C., de la Fuente Marcos, R., et al. 2019, A&A, 625, A133
Mainzer, A., Grav, T., Masiero, J., et al. 2011, ApJ, 741, 90
Makino, J. 1991, ApJ, 369, 200
McDowell, J. C., 2020, General Catalog of Artificial Space Objects, Release 1.2.12 , https://planet4589.org/space/gcat
Micheli, M., Buzzoni, A., Koschny, D., et al. 2018, Icarus, 304, 4
Morais, M. H. M. & Morbidelli, A. 2002, Icarus, 160, 1
Murray, C. D., & Dermott, S. F. 1999, Solar System Dynamics (Cambridge: Cambridge University Press)
Park, R. S., Folkner, W. M., Williams, J. G., et al. 2021, AJ, 161, 105
Popescu, M., Birlan, M., & Nedelcu, D. A. 2012, A&A, 544, A130
Popescu, M., Vaduvescu, O., de León, J., et al. 2019, A&A, 627, A124
Reddy, V., Kelley, M. S., Dotson, J., et al. 2022, PSJ, 3, 123
Roa, J., Farnocchia, D., & Chesley, S. R. 2021, AJ, 162, 277
Schildknecht, T. 2007, A&A Rev., 14, 41
Sharkey, B. N. L., Reddy, V., Malhotra, R., et al. 2021, Communications Earth and Environment, 2, 231
Tancredi, G. 1997, Celestial Mechanics and Dynamical Astronomy, 69, 119
Valsecchi, G. B., Milani, A., Gronchi, G. F., et al. 2003, A&A, 408, 1179
Vananti, A., Schildknecht, T., & Krag, H. 2017, Advances in Space Research,
59, 2488
Watson, T. 2016, Nature, 19162