Physical properties of Centaur (60558) 174P/Echeclus from stellar occultations

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dc.contributor.authorPereira, C. L.
dc.contributor.authorBraga-Ribas, F.
dc.contributor.authorSicardy, B.
dc.contributor.authorGomes-Junior, A. R.
dc.contributor.authorOrtiz, J. L.
dc.contributor.authorBranco, H. C.
dc.contributor.authorCamargo, J. I. B.
dc.contributor.authorMorgado, B. E.
dc.contributor.authorVieira-Martins, R.
dc.contributor.authorAssafin, M.
dc.contributor.authorBenedetti-Rossi, G.
dc.contributor.authorDesmars, J.
dc.contributor.authorEmilio, M.
dc.contributor.authorMorales, R.
dc.contributor.authorRommel, F. L.
dc.contributor.authorHayamizu, T.
dc.contributor.authorGondou, T.
dc.contributor.authorJehin, E.
dc.contributor.authorArtola, R. A.
dc.contributor.authorAsai, A.
dc.contributor.authorColazo, C.
dc.contributor.authorDucrot, E.
dc.contributor.authorDuffard, R.
dc.contributor.authorFabrega, J.
dc.contributor.authorFernandez-Valenzuela, E.
dc.contributor.authorGillon, M.
dc.contributor.authorHoraguchi, T.
dc.contributor.authorIda, M.
dc.contributor.authorKitazaki, K.
dc.contributor.authorMammana, L. A.
dc.contributor.authorMaury, A.
dc.contributor.authorMelita, M.
dc.contributor.authorMorales, N.
dc.contributor.authorMoya-Sierralta, C.
dc.contributor.authorOwada, M.
dc.contributor.authorPollock, J.
dc.contributor.authorSanchez, J. L.
dc.contributor.authorSantos-Sanz, P.
dc.contributor.authorSasanuma, N.
dc.contributor.authorSebastian, D.
dc.contributor.authorTriaud, A.
dc.contributor.authorUchiyama, S.
dc.contributor.authorVanzi, L.
dc.contributor.authorWatanabe, H.
dc.contributor.authorYamamura, H.
dc.date.accessioned2025-01-20T16:10:15Z
dc.date.available2025-01-20T16:10:15Z
dc.date.issued2024
dc.description.abstractThe Centaur (60558) Echeclus was discovered on 2000 March 03, orbiting between the orbits of Jupiter and Uranus. After exhibiting frequent outbursts, it also received a comet designation, 174P. If the ejected material can be a source of debris to form additional structures, studying the surroundings of an active body like Echeclus can provide clues about the formation scenarios of rings, jets, or dusty shells around small bodies. Stellar occultation is a handy technique for this kind of investigation, as it can, from Earth-based observations, detect small structures with low opacity around these objects. Stellar occultation by Echeclus was predicted and observed in 2019, 2020, and 2021. We obtain upper detection limits of rings with widths larger than 0.5km and optical depth of tau = 0.02. These values are smaller than those of Chariklo's main ring; in other words, a Chariklo-like ring would have been detected. The occultation observed in 2020 provided two positive chords used to derive the triaxial dimensions of Echeclus based on a 3D model and pole orientation available in the literature. We obtained a = 37.0 +/- 0.6km, b = 28.4 +/- 0.5km, and c = 24.9 +/- 0.4km, resulting in an area-equivalent radius of 30.0 +/- 0.5km. Using the projected limb at the occultation epoch and the available absolute magnitude (), we calculate an albedo of p(v) = 0.050 +/- 0.003. Constraints on the object's density and internal friction are also proposed.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stad3318
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stad3318
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90199
dc.identifier.wosidWOS:001112824700034
dc.issue.numero2
dc.language.isoen
dc.pagina.final3638
dc.pagina.inicio3624
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectMethods: data analysis
dc.subjectMethods: observational
dc.subjectOccultations
dc.subjectMinor planets
dc.subjectasteroids: individual: Echeclus
dc.titlePhysical properties of Centaur (60558) 174P/Echeclus from stellar occultations
dc.typeartículo
dc.volumen527
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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