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Physical properties of trans-Neptunian object (143707) 2003 UY117 derived from stellar occultation and photometric observations

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Main Authors:	Kretlow, M., Ortiz, J. L., Desmars, J., Morales, N., Rommel, F. L., Santos-Sanz, P., Vara-Lubiano, M., Fernández-Valenzuela, E., Alvarez-Candal, A., Duffard, R., Braga-Ribas, F., Sicardy, B., Castro-Tirado, A., Fernández-García, E. J., Sánchez, M., Sota, A., Assafin, M., Benedetti-Rossi, G., Boufleur, R., Camargo, J. I. B., Cikota, S., Gomes-Junior, A., Gómez-Limón, J. M., Kilic, Y., Lecacheux, J., Leiva, R., Marques-Oliveira, J., Morales, R., Morgado, B., Rizos, J. L., Roques, F., Souami, D., Vieira-Martins, R., Alarcon, M. R., Boninsegna, R., Çakır, O., Casarramona, F., Castellani, J. J., de la Cueva, I., Fişek, S., Guijarro, A., Haymes, T., Jehin, E., Kidd, S., Licandro, J., Maestre, J. L., Murgas, F., Pallé, E., Popescu, M., Pratt, A., Serra-Ricart, M., Talbot, J. C.
Format:	Preprint
Published:	2024
Subjects:	Earth and Planetary Astrophysics
Online Access:	Acceder al recurso
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_version_	1866910627023290368
author	Kretlow, M. Ortiz, J. L. Desmars, J. Morales, N. Rommel, F. L. Santos-Sanz, P. Vara-Lubiano, M. Fernández-Valenzuela, E. Alvarez-Candal, A. Duffard, R. Braga-Ribas, F. Sicardy, B. Castro-Tirado, A. Fernández-García, E. J. Sánchez, M. Sota, A. Assafin, M. Benedetti-Rossi, G. Boufleur, R. Camargo, J. I. B. Cikota, S. Gomes-Junior, A. Gómez-Limón, J. M. Kilic, Y. Lecacheux, J. Leiva, R. Marques-Oliveira, J. Morales, R. Morgado, B. Rizos, J. L. Roques, F. Souami, D. Vieira-Martins, R. Alarcon, M. R. Boninsegna, R. Çakır, O. Casarramona, F. Castellani, J. J. de la Cueva, I. Fişek, S. Guijarro, A. Haymes, T. Jehin, E. Kidd, S. Licandro, J. Maestre, J. L. Murgas, F. Pallé, E. Popescu, M. Pratt, A. Serra-Ricart, M. Talbot, J. C.
author_facet	Kretlow, M. Ortiz, J. L. Desmars, J. Morales, N. Rommel, F. L. Santos-Sanz, P. Vara-Lubiano, M. Fernández-Valenzuela, E. Alvarez-Candal, A. Duffard, R. Braga-Ribas, F. Sicardy, B. Castro-Tirado, A. Fernández-García, E. J. Sánchez, M. Sota, A. Assafin, M. Benedetti-Rossi, G. Boufleur, R. Camargo, J. I. B. Cikota, S. Gomes-Junior, A. Gómez-Limón, J. M. Kilic, Y. Lecacheux, J. Leiva, R. Marques-Oliveira, J. Morales, R. Morgado, B. Rizos, J. L. Roques, F. Souami, D. Vieira-Martins, R. Alarcon, M. R. Boninsegna, R. Çakır, O. Casarramona, F. Castellani, J. J. de la Cueva, I. Fişek, S. Guijarro, A. Haymes, T. Jehin, E. Kidd, S. Licandro, J. Maestre, J. L. Murgas, F. Pallé, E. Popescu, M. Pratt, A. Serra-Ricart, M. Talbot, J. C.
contents	Trans-Neptunian objects (TNOs) are considered to be among the most primitive objects in our Solar System. Knowledge of their primary physical properties is essential for understanding their origin and the evolution of the outer Solar System. We predicted a stellar occultation by this TNO for 2020 October 23 UT and ran a specific campaign to investigate this event. We derived the projected profile shape and size from the occultation observations by means of an elliptical fit to the occultation chords. We also performed photometric observations of (143707) 2003 UY117 to obtain the absolute magnitude and the rotational period from the observed rotational light curve. Finally, we combined these results to derive the three-dimensional shape, volume-equivalent diameter, and geometric albedo for this TNO. From the stellar occultation, we obtained a projected ellipse with axes of $(282 \pm 18) \times (184 \pm 32)$ km. The area-equivalent diameter for this ellipse is $D_\textrm{eq,A} = 228 \pm 21$ km. From our photometric $R$ band observations, we derived an absolute magnitude of $H_V = 5.97 \pm 0.07$ mag using $V-R = 0.46 \pm 0.07$ mag, which was derived from a $V$ band subset of these data. The rotational light curve has a peak-to-valley amplitude of $Δm = 0.36 \pm 0.13$ mag. We find the most likely rotation period to be $P = 12.376 \pm 0.0033$ hours. By combining the occultation with the rotational light curve results and assuming a triaxial ellipsoid, we derived axes of $a \times b \times c = (332 \pm 24)$ km $\times$ $(216 \pm 24)$ km $\times$ $(180\substack{+28\\-24})$ km for this ellipsoid, and therefore a volume-equivalent diameter of $D_\textrm{eq,V} = 235 \pm 25$ km. Finally, the values for the absolute magnitude and for the area-equivalent diameter yield a geometric albedo of $p_V = 0.139 \pm 0.027$.
format	Preprint
id	arxiv_https___arxiv_org_abs_2410_00561
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Physical properties of trans-Neptunian object (143707) 2003 UY117 derived from stellar occultation and photometric observations Kretlow, M. Ortiz, J. L. Desmars, J. Morales, N. Rommel, F. L. Santos-Sanz, P. Vara-Lubiano, M. Fernández-Valenzuela, E. Alvarez-Candal, A. Duffard, R. Braga-Ribas, F. Sicardy, B. Castro-Tirado, A. Fernández-García, E. J. Sánchez, M. Sota, A. Assafin, M. Benedetti-Rossi, G. Boufleur, R. Camargo, J. I. B. Cikota, S. Gomes-Junior, A. Gómez-Limón, J. M. Kilic, Y. Lecacheux, J. Leiva, R. Marques-Oliveira, J. Morales, R. Morgado, B. Rizos, J. L. Roques, F. Souami, D. Vieira-Martins, R. Alarcon, M. R. Boninsegna, R. Çakır, O. Casarramona, F. Castellani, J. J. de la Cueva, I. Fişek, S. Guijarro, A. Haymes, T. Jehin, E. Kidd, S. Licandro, J. Maestre, J. L. Murgas, F. Pallé, E. Popescu, M. Pratt, A. Serra-Ricart, M. Talbot, J. C. Earth and Planetary Astrophysics Trans-Neptunian objects (TNOs) are considered to be among the most primitive objects in our Solar System. Knowledge of their primary physical properties is essential for understanding their origin and the evolution of the outer Solar System. We predicted a stellar occultation by this TNO for 2020 October 23 UT and ran a specific campaign to investigate this event. We derived the projected profile shape and size from the occultation observations by means of an elliptical fit to the occultation chords. We also performed photometric observations of (143707) 2003 UY117 to obtain the absolute magnitude and the rotational period from the observed rotational light curve. Finally, we combined these results to derive the three-dimensional shape, volume-equivalent diameter, and geometric albedo for this TNO. From the stellar occultation, we obtained a projected ellipse with axes of $(282 \pm 18) \times (184 \pm 32)$ km. The area-equivalent diameter for this ellipse is $D_\textrm{eq,A} = 228 \pm 21$ km. From our photometric $R$ band observations, we derived an absolute magnitude of $H_V = 5.97 \pm 0.07$ mag using $V-R = 0.46 \pm 0.07$ mag, which was derived from a $V$ band subset of these data. The rotational light curve has a peak-to-valley amplitude of $Δm = 0.36 \pm 0.13$ mag. We find the most likely rotation period to be $P = 12.376 \pm 0.0033$ hours. By combining the occultation with the rotational light curve results and assuming a triaxial ellipsoid, we derived axes of $a \times b \times c = (332 \pm 24)$ km $\times$ $(216 \pm 24)$ km $\times$ $(180\substack{+28\\-24})$ km for this ellipsoid, and therefore a volume-equivalent diameter of $D_\textrm{eq,V} = 235 \pm 25$ km. Finally, the values for the absolute magnitude and for the area-equivalent diameter yield a geometric albedo of $p_V = 0.139 \pm 0.027$.
title	Physical properties of trans-Neptunian object (143707) 2003 UY117 derived from stellar occultation and photometric observations
topic	Earth and Planetary Astrophysics
url	https://arxiv.org/abs/2410.00561