Observational detection of eclipses of J5 Amalthea by the Galilean satellites
A.A. Christou, F. Lewis, P. Roche, M.G. Hidas, T.M. Brown

TL;DR
This study successfully detected Amalthea's eclipses by Galilean satellites using ground-based near-infrared photometry, refining its orbital position and demonstrating the technique's potential for improved ephemeris accuracy.
Contribution
First application of mutual event photometry to Amalthea's eclipses from ground-based telescopes, providing improved orbital data and demonstrating the method's effectiveness.
Findings
Detected Amalthea's eclipse with clear flux drop
Estimated impact parameter and eclipse timing
Indicated Amalthea is slightly ahead of predicted ephemeris
Abstract
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. 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…
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