A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations

Autores
Rommel, F. L.; Braga Ribas, F.; Ortiz, J. L.; Sicardy, B.; Santos Sanz, P.; Desmars, J.; Camargo, J. I. B.; Vieira Martins, R.; Assafin, M.; Morgado, B. E.; Boufleur, R. C.; Benedetti Rossi, G.; Gomes Júnior, A. R.; Fernández Valenzuela, E.; Holler, B. J.; Souami, D.; Duffard, R.; Margoti, G.; Vara Lubiano, M.; Lecacheux, J.; Plouvier, J. L.; Morales, N.; Popescu, M.; Mammana, Luis Antonio; Fernandez Lajus, Eduardo Eusebio; Swaney, R. L.; Fuentes, C.; Mendez, R. A.; Flynn, R. L.; Wake, D. A.
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. The physical characterization of trans-Neptunian objects is essential for improving our understanding of the formation and evolution of our Solar System. Stellar occultation is a ground-based technique that can be successfully used to determine some of the TNOs’ fundamental physical properties with high precision, such as size and shape.Aims. This work is aimed at constraining the size, shape, and geometric albedo of the dwarf planet candidate (307261) 2002 MS4 through the analysis of nine stellar occultation events. Using multichord detection, we also study the object’s topography by analyzing the obtained limb and residuals between the observed chords and the best-fit ellipse.Metods. We predicted and organized the observational campaigns of nine stellar occultations by 2002 MS4 between 2019 and 2022, resulting in two single-chord events, four double-chord detections, and three events with between 3 and 61 positive chords. We derived the occultation light curves using differential aperture photometry, from which the star ingress and egress instants were calculated. Using 13 selected chords from the 8 August 2020 event, we determined the global elliptical limb of 2002 MS4. The best-fit ellipse, combined with the object’s rotational information from the literature, sets constraints on the object’s size, shape, and albedo. Additionally, we developed a new method to characterize the topography features on the object’s limb.Results. The global limb has a semi-major axis of a′ = 412 ± 10 km, a semi-minor axis of b′= 385 ± 17 km, and the position angle of the minor axis is 121° ± 16°. From this instantaneous limb, we obtained 2002 MS4’s geometric albedo of pV = 0.1 ± 0.025, using HV = 3.63 ± 0.05 mag and a projected area-equivalent diameter of 796 ± 24 km. Significant deviations from the fitted ellipse in the northernmost limb were detected from multiple sites, highlighting three distinct topographic features: one 11 km depth depression, followed by a 25−5+4 km height elevation next to a crater-like depression, with an extension of 322 ± 39 km and 45.1 ± 1.5 km deep.Conclusions. Our results indicate the presence of an object that is ≈138 km smaller in diameter than that derived from thermal data, possibly indicating the presence of a thus-far unknown satellite. However, within the error bars, the geometric albedo in the V-band is in agreement with the results published in the literature, even with the radiometric-derived albedo. This stellar occultation has allowed for the first multichord measurement of a large topography in a TNO.
Fil: Rommel, F. L.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. Universidade Tecnologia Federal do Parana; Brasil
Fil: Braga Ribas, F.. Universidade Tecnologia Federal do Parana; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. National Observatory; Brasil
Fil: Ortiz, J. L.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Sicardy, B.. Centre National de la Recherche Scientifique; Francia. Sorbonne University; Francia. PSL Research University; Francia
Fil: Santos Sanz, P.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Desmars, J.. Polytechnic Institute of Advanced Sciences; Francia
Fil: Camargo, J. I. B.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Vieira Martins, R.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Assafin, M.. Universidade Federal do Rio de Janeiro; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Morgado, B. E.. Universidade Federal do Rio de Janeiro; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. National Observatory; Brasil
Fil: Boufleur, R. C.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Benedetti Rossi, G.. Universidade de Sao Paulo; Brasil. Sorbonne University; Francia. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Gomes Júnior, A. R.. Universidade Federal de Uberlandia; Brasil. Universidade de Sao Paulo; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Fernández Valenzuela, E.. University of Florida; Estados Unidos
Fil: Holler, B. J.. Space Telescope Science Institute; Estados Unidos
Fil: Souami, D.. Sorbonne University; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Duffard, R.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Margoti, G.. Universidade Tecnologia Federal do Parana; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Vara Lubiano, M.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Lecacheux, J.. PSL University; Francia. Centre National de la Recherche Scientifique; Francia. Sorbonne University; Francia
Fil: Plouvier, J. L.. Domaine de la Blaque Observatory; Francia
Fil: Morales, N.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Popescu, M.. Astronomical Institute of the Romanian Academy; Rumania
Fil: Mammana, Luis Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; Argentina
Fil: Fernandez Lajus, Eduardo Eusebio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Swaney, R. L.. Chagrin Valley Astronomical Society; Estados Unidos
Fil: Fuentes, C.. Institute of Space Science; Rumania. Universidad de Chile; Chile. Centro de Excelencia en Astrofísica y Tecnologías Afines; Chile
Fil: Mendez, R. A.. Universidad de Chile; Chile
Fil: Flynn, R. L.. Squirrel Valley Observatory; Estados Unidos
Fil: Wake, D. A.. University of North Carolina; Estados Unidos
Materia
Kuiper belt objects: individual: 2002 MS4
methods: observational
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/250412
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/250412
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultationsRommel, F. L.Braga Ribas, F.Ortiz, J. L.Sicardy, B.Santos Sanz, P.Desmars, J.Camargo, J. I. B.Vieira Martins, R.Assafin, M.Morgado, B. E.Boufleur, R. C.Benedetti Rossi, G.Gomes Júnior, A. R.Fernández Valenzuela, E.Holler, B. J.Souami, D.Duffard, R.Margoti, G.Vara Lubiano, M.Lecacheux, J.Plouvier, J. L.Morales, N.Popescu, M.Mammana, Luis AntonioFernandez Lajus, Eduardo EusebioSwaney, R. L.Fuentes, C.Mendez, R. A.Flynn, R. L.Wake, D. A.Kuiper belt objects: individual: 2002 MS4methods: observationalhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. The physical characterization of trans-Neptunian objects is essential for improving our understanding of the formation and evolution of our Solar System. Stellar occultation is a ground-based technique that can be successfully used to determine some of the TNOs’ fundamental physical properties with high precision, such as size and shape.Aims. This work is aimed at constraining the size, shape, and geometric albedo of the dwarf planet candidate (307261) 2002 MS4 through the analysis of nine stellar occultation events. Using multichord detection, we also study the object’s topography by analyzing the obtained limb and residuals between the observed chords and the best-fit ellipse.Metods. We predicted and organized the observational campaigns of nine stellar occultations by 2002 MS4 between 2019 and 2022, resulting in two single-chord events, four double-chord detections, and three events with between 3 and 61 positive chords. We derived the occultation light curves using differential aperture photometry, from which the star ingress and egress instants were calculated. Using 13 selected chords from the 8 August 2020 event, we determined the global elliptical limb of 2002 MS4. The best-fit ellipse, combined with the object’s rotational information from the literature, sets constraints on the object’s size, shape, and albedo. Additionally, we developed a new method to characterize the topography features on the object’s limb.Results. The global limb has a semi-major axis of a′ = 412 ± 10 km, a semi-minor axis of b′= 385 ± 17 km, and the position angle of the minor axis is 121° ± 16°. From this instantaneous limb, we obtained 2002 MS4’s geometric albedo of pV = 0.1 ± 0.025, using HV = 3.63 ± 0.05 mag and a projected area-equivalent diameter of 796 ± 24 km. Significant deviations from the fitted ellipse in the northernmost limb were detected from multiple sites, highlighting three distinct topographic features: one 11 km depth depression, followed by a 25−5+4 km height elevation next to a crater-like depression, with an extension of 322 ± 39 km and 45.1 ± 1.5 km deep.Conclusions. Our results indicate the presence of an object that is ≈138 km smaller in diameter than that derived from thermal data, possibly indicating the presence of a thus-far unknown satellite. However, within the error bars, the geometric albedo in the V-band is in agreement with the results published in the literature, even with the radiometric-derived albedo. This stellar occultation has allowed for the first multichord measurement of a large topography in a TNO.Fil: Rommel, F. L.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. Universidade Tecnologia Federal do Parana; BrasilFil: Braga Ribas, F.. Universidade Tecnologia Federal do Parana; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. National Observatory; BrasilFil: Ortiz, J. L.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; EspañaFil: Sicardy, B.. Centre National de la Recherche Scientifique; Francia. Sorbonne University; Francia. PSL Research University; FranciaFil: Santos Sanz, P.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; EspañaFil: Desmars, J.. Polytechnic Institute of Advanced Sciences; FranciaFil: Camargo, J. I. B.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; BrasilFil: Vieira Martins, R.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; BrasilFil: Assafin, M.. Universidade Federal do Rio de Janeiro; Brasil. Interinstitutional e-Astronomy Laboratory; BrasilFil: Morgado, B. E.. Universidade Federal do Rio de Janeiro; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. National Observatory; BrasilFil: Boufleur, R. C.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; BrasilFil: Benedetti Rossi, G.. Universidade de Sao Paulo; Brasil. Sorbonne University; Francia. Interinstitutional e-Astronomy Laboratory; BrasilFil: Gomes Júnior, A. R.. Universidade Federal de Uberlandia; Brasil. Universidade de Sao Paulo; Brasil. Interinstitutional e-Astronomy Laboratory; BrasilFil: Fernández Valenzuela, E.. University of Florida; Estados UnidosFil: Holler, B. J.. Space Telescope Science Institute; Estados UnidosFil: Souami, D.. Sorbonne University; Francia. Centre National de la Recherche Scientifique; FranciaFil: Duffard, R.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; EspañaFil: Margoti, G.. Universidade Tecnologia Federal do Parana; Brasil. Interinstitutional e-Astronomy Laboratory; BrasilFil: Vara Lubiano, M.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; EspañaFil: Lecacheux, J.. PSL University; Francia. Centre National de la Recherche Scientifique; Francia. Sorbonne University; FranciaFil: Plouvier, J. L.. Domaine de la Blaque Observatory; FranciaFil: Morales, N.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; EspañaFil: Popescu, M.. Astronomical Institute of the Romanian Academy; RumaniaFil: Mammana, Luis Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; ArgentinaFil: Fernandez Lajus, Eduardo Eusebio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Swaney, R. L.. Chagrin Valley Astronomical Society; Estados UnidosFil: Fuentes, C.. Institute of Space Science; Rumania. Universidad de Chile; Chile. Centro de Excelencia en Astrofísica y Tecnologías Afines; ChileFil: Mendez, R. A.. Universidad de Chile; ChileFil: Flynn, R. L.. Squirrel Valley Observatory; Estados UnidosFil: Wake, D. A.. University of North Carolina; Estados UnidosEDP Sciences2023-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/zipapplication/pdfhttp://hdl.handle.net/11336/250412Rommel, F. L.; Braga Ribas, F.; Ortiz, J. L.; Sicardy, B.; Santos Sanz, P.; et al.; A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations; EDP Sciences; Astronomy and Astrophysics; 678; A167; 10-2023; 1-250004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202346892info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202346892info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:01:26Zoai:ri.conicet.gov.ar:11336/250412instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:01:26.836CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations
title A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations
spellingShingle A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations
Rommel, F. L.
Kuiper belt objects: individual: 2002 MS4
methods: observational
title_short A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations
title_full A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations
title_fullStr A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations
title_full_unstemmed A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations
title_sort A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations
dc.creator.none.fl_str_mv Rommel, F. L.
Braga Ribas, F.
Ortiz, J. L.
Sicardy, B.
Santos Sanz, P.
Desmars, J.
Camargo, J. I. B.
Vieira Martins, R.
Assafin, M.
Morgado, B. E.
Boufleur, R. C.
Benedetti Rossi, G.
Gomes Júnior, A. R.
Fernández Valenzuela, E.
Holler, B. J.
Souami, D.
Duffard, R.
Margoti, G.
Vara Lubiano, M.
Lecacheux, J.
Plouvier, J. L.
Morales, N.
Popescu, M.
Mammana, Luis Antonio
Fernandez Lajus, Eduardo Eusebio
Swaney, R. L.
Fuentes, C.
Mendez, R. A.
Flynn, R. L.
Wake, D. A.
author Rommel, F. L.
author_facet Rommel, F. L.
Braga Ribas, F.
Ortiz, J. L.
Sicardy, B.
Santos Sanz, P.
Desmars, J.
Camargo, J. I. B.
Vieira Martins, R.
Assafin, M.
Morgado, B. E.
Boufleur, R. C.
Benedetti Rossi, G.
Gomes Júnior, A. R.
Fernández Valenzuela, E.
Holler, B. J.
Souami, D.
Duffard, R.
Margoti, G.
Vara Lubiano, M.
Lecacheux, J.
Plouvier, J. L.
Morales, N.
Popescu, M.
Mammana, Luis Antonio
Fernandez Lajus, Eduardo Eusebio
Swaney, R. L.
Fuentes, C.
Mendez, R. A.
Flynn, R. L.
Wake, D. A.
author_role author
author2 Braga Ribas, F.
Ortiz, J. L.
Sicardy, B.
Santos Sanz, P.
Desmars, J.
Camargo, J. I. B.
Vieira Martins, R.
Assafin, M.
Morgado, B. E.
Boufleur, R. C.
Benedetti Rossi, G.
Gomes Júnior, A. R.
Fernández Valenzuela, E.
Holler, B. J.
Souami, D.
Duffard, R.
Margoti, G.
Vara Lubiano, M.
Lecacheux, J.
Plouvier, J. L.
Morales, N.
Popescu, M.
Mammana, Luis Antonio
Fernandez Lajus, Eduardo Eusebio
Swaney, R. L.
Fuentes, C.
Mendez, R. A.
Flynn, R. L.
Wake, D. A.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Kuiper belt objects: individual: 2002 MS4
methods: observational
topic Kuiper belt objects: individual: 2002 MS4
methods: observational
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. The physical characterization of trans-Neptunian objects is essential for improving our understanding of the formation and evolution of our Solar System. Stellar occultation is a ground-based technique that can be successfully used to determine some of the TNOs’ fundamental physical properties with high precision, such as size and shape.Aims. This work is aimed at constraining the size, shape, and geometric albedo of the dwarf planet candidate (307261) 2002 MS4 through the analysis of nine stellar occultation events. Using multichord detection, we also study the object’s topography by analyzing the obtained limb and residuals between the observed chords and the best-fit ellipse.Metods. We predicted and organized the observational campaigns of nine stellar occultations by 2002 MS4 between 2019 and 2022, resulting in two single-chord events, four double-chord detections, and three events with between 3 and 61 positive chords. We derived the occultation light curves using differential aperture photometry, from which the star ingress and egress instants were calculated. Using 13 selected chords from the 8 August 2020 event, we determined the global elliptical limb of 2002 MS4. The best-fit ellipse, combined with the object’s rotational information from the literature, sets constraints on the object’s size, shape, and albedo. Additionally, we developed a new method to characterize the topography features on the object’s limb.Results. The global limb has a semi-major axis of a′ = 412 ± 10 km, a semi-minor axis of b′= 385 ± 17 km, and the position angle of the minor axis is 121° ± 16°. From this instantaneous limb, we obtained 2002 MS4’s geometric albedo of pV = 0.1 ± 0.025, using HV = 3.63 ± 0.05 mag and a projected area-equivalent diameter of 796 ± 24 km. Significant deviations from the fitted ellipse in the northernmost limb were detected from multiple sites, highlighting three distinct topographic features: one 11 km depth depression, followed by a 25−5+4 km height elevation next to a crater-like depression, with an extension of 322 ± 39 km and 45.1 ± 1.5 km deep.Conclusions. Our results indicate the presence of an object that is ≈138 km smaller in diameter than that derived from thermal data, possibly indicating the presence of a thus-far unknown satellite. However, within the error bars, the geometric albedo in the V-band is in agreement with the results published in the literature, even with the radiometric-derived albedo. This stellar occultation has allowed for the first multichord measurement of a large topography in a TNO.
Fil: Rommel, F. L.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. Universidade Tecnologia Federal do Parana; Brasil
Fil: Braga Ribas, F.. Universidade Tecnologia Federal do Parana; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. National Observatory; Brasil
Fil: Ortiz, J. L.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Sicardy, B.. Centre National de la Recherche Scientifique; Francia. Sorbonne University; Francia. PSL Research University; Francia
Fil: Santos Sanz, P.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Desmars, J.. Polytechnic Institute of Advanced Sciences; Francia
Fil: Camargo, J. I. B.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Vieira Martins, R.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Assafin, M.. Universidade Federal do Rio de Janeiro; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Morgado, B. E.. Universidade Federal do Rio de Janeiro; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil. National Observatory; Brasil
Fil: Boufleur, R. C.. National Observatory; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Benedetti Rossi, G.. Universidade de Sao Paulo; Brasil. Sorbonne University; Francia. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Gomes Júnior, A. R.. Universidade Federal de Uberlandia; Brasil. Universidade de Sao Paulo; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Fernández Valenzuela, E.. University of Florida; Estados Unidos
Fil: Holler, B. J.. Space Telescope Science Institute; Estados Unidos
Fil: Souami, D.. Sorbonne University; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Duffard, R.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Margoti, G.. Universidade Tecnologia Federal do Parana; Brasil. Interinstitutional e-Astronomy Laboratory; Brasil
Fil: Vara Lubiano, M.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Lecacheux, J.. PSL University; Francia. Centre National de la Recherche Scientifique; Francia. Sorbonne University; Francia
Fil: Plouvier, J. L.. Domaine de la Blaque Observatory; Francia
Fil: Morales, N.. Institute of Astrophysics of Andalucía; España. Consejo Superior de Investigaciones Científicas; España
Fil: Popescu, M.. Astronomical Institute of the Romanian Academy; Rumania
Fil: Mammana, Luis Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; Argentina
Fil: Fernandez Lajus, Eduardo Eusebio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Swaney, R. L.. Chagrin Valley Astronomical Society; Estados Unidos
Fil: Fuentes, C.. Institute of Space Science; Rumania. Universidad de Chile; Chile. Centro de Excelencia en Astrofísica y Tecnologías Afines; Chile
Fil: Mendez, R. A.. Universidad de Chile; Chile
Fil: Flynn, R. L.. Squirrel Valley Observatory; Estados Unidos
Fil: Wake, D. A.. University of North Carolina; Estados Unidos
description Context. The physical characterization of trans-Neptunian objects is essential for improving our understanding of the formation and evolution of our Solar System. Stellar occultation is a ground-based technique that can be successfully used to determine some of the TNOs’ fundamental physical properties with high precision, such as size and shape.Aims. This work is aimed at constraining the size, shape, and geometric albedo of the dwarf planet candidate (307261) 2002 MS4 through the analysis of nine stellar occultation events. Using multichord detection, we also study the object’s topography by analyzing the obtained limb and residuals between the observed chords and the best-fit ellipse.Metods. We predicted and organized the observational campaigns of nine stellar occultations by 2002 MS4 between 2019 and 2022, resulting in two single-chord events, four double-chord detections, and three events with between 3 and 61 positive chords. We derived the occultation light curves using differential aperture photometry, from which the star ingress and egress instants were calculated. Using 13 selected chords from the 8 August 2020 event, we determined the global elliptical limb of 2002 MS4. The best-fit ellipse, combined with the object’s rotational information from the literature, sets constraints on the object’s size, shape, and albedo. Additionally, we developed a new method to characterize the topography features on the object’s limb.Results. The global limb has a semi-major axis of a′ = 412 ± 10 km, a semi-minor axis of b′= 385 ± 17 km, and the position angle of the minor axis is 121° ± 16°. From this instantaneous limb, we obtained 2002 MS4’s geometric albedo of pV = 0.1 ± 0.025, using HV = 3.63 ± 0.05 mag and a projected area-equivalent diameter of 796 ± 24 km. Significant deviations from the fitted ellipse in the northernmost limb were detected from multiple sites, highlighting three distinct topographic features: one 11 km depth depression, followed by a 25−5+4 km height elevation next to a crater-like depression, with an extension of 322 ± 39 km and 45.1 ± 1.5 km deep.Conclusions. Our results indicate the presence of an object that is ≈138 km smaller in diameter than that derived from thermal data, possibly indicating the presence of a thus-far unknown satellite. However, within the error bars, the geometric albedo in the V-band is in agreement with the results published in the literature, even with the radiometric-derived albedo. This stellar occultation has allowed for the first multichord measurement of a large topography in a TNO.
publishDate 2023
dc.date.none.fl_str_mv 2023-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/250412
Rommel, F. L.; Braga Ribas, F.; Ortiz, J. L.; Sicardy, B.; Santos Sanz, P.; et al.; A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations; EDP Sciences; Astronomy and Astrophysics; 678; A167; 10-2023; 1-25
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/250412
identifier_str_mv Rommel, F. L.; Braga Ribas, F.; Ortiz, J. L.; Sicardy, B.; Santos Sanz, P.; et al.; A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS 4 measured from stellar occultations; EDP Sciences; Astronomy and Astrophysics; 678; A167; 10-2023; 1-25
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202346892
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202346892
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/zip
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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