Observational detection of eclipses of J5 Amalthea by the Galilean satellites
Apostolos A. Christou,Fraser Lewis,Fraser Lewis,Fraser Lewis,Paul Roche,Paul Roche,Paul Roche,M. G. Hidas,M. G. Hidas,Timothy M. Brown,Timothy M. Brown +10 more
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TLDR
In this paper, the authors carried out observations of the small jovian satellite Amalthea (J5) as it was being eclipsed by the Galilean satellites near the 2009 equinox of Jupiter in order to apply the technique of mutual event photometry to the astrometric determination of this satellite's position.Abstract:
Aims. We carried out observations of the small jovian satellite Amalthea (J5) as it was being eclipsed by the Galilean satellites near the 2009 equinox of Jupiter in order to apply the technique of mutual event photometry to the astrometric determination of this satellite’s position. Methods. The observations were carried out during the period 06/2009−09/2009 from the island of Maui, Hawaii and Siding Spring, Australia with the 2m Faulkes Telescopes North and South respectively. We observed in the near-infrared part of the spectrum using a PanStarrs-Z filter with Jupiter near the edge of the field in order to mitigate against the glare from the planet. Frames were acquired at rates >1/min during eclipse times predicted using recent JPL ephemerides for the satellites. Following subtraction of the sky background from these frames, differential aperture photometry was carried out on Amalthea and a nearby field star. Results. We have obtained three lightcurves which show a clear drop in the flux from Amalthea, indicating that an eclipse took place as predicted. These were model-fitted to yield best estimates of the time of maximum flux drop and the impact parameter. These are consistent with Amalthea’s ephemeris but indicate that Amalthea is slightly ahead of, and closer to Jupiter than, its predicted position by approximately half the ephemeris uncertainty in these directions. We argue that a ground-based campaign of higher-cadence photometry accurate at the 5% level or better during the next season of eclipses in 2014-15 should yield positions to within 0. �� 05 and affect a corresponding improvement in Amalthea’s ephemeris.read more
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TL;DR: The goal of this paper is to show that some phenomena occurring during the equinox on the giant planets are worth to be observed, and to encourage observations in the next future especially for planetary systems for which no space mission is planned.
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Eclipses of the inner satellites of Jupiter observed in 2015
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TL;DR: In this paper, the positioning accuracy of the inner satellites determined with photometry is estimated for dynamical studies, based on estimating the relative positions of the outer satellites of Amalthea and Thebe.
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The 2014-2015 Brazilian mutual phenomena campaign for the Jovian satellites and improved results for the 2009 events
B. E. Morgado,R. Vieira-Martins,Marcelo Assafin,A. Dias-Oliveira,D. I. Machado,Julio Camargo,M. Malacarne,Rafael Sfair,Othon C. Winter,Felipe Braga-Ribas,G. Benedetti-Rossi,L. A. G. Boldrin,B. C. B. Camargo,H. S. Gaspar,A. R. Gomes-Junior,J. O. Miranda,T. de Santana,L. L. Trabuco +17 more
TL;DR: The results of the 2014-2015 Brazilian campaign for 40 mutual events from 47 observed light curves by the Galilean satellites plus one eclipse of Amalthea by Ganymede were presented in this paper.
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Eclipses of the inner satellites of Jupiter observed in 2015
E. Saquet,E. Saquet,N. V. Emelyanov,N. V. Emelyanov,François Colas,Jean-Eudes Arlot,Vincent Robert,Vincent Robert,B. Christophe,O. Dechambre +9 more
TL;DR: In this article, ground-based photometric observations of eclipses of Amalthea (JV) and Thebe (JXIV) by the Galilean moons were recorded during the 2014-2015 campaign of mutual events.
References
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Mutual phenomena involving J5 Amalthea in 2002-2003
TL;DR: In this paper, the authors provide predictions of mutual eclipses and occultations involving the fifth satellite J5 Amalthea, spanning from November 2002 to June 2003 and to urge astronomers to observe them.
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