Skip to Main content Skip to Navigation
Theses

Photométrie et Astrométrie des Satellites de Jupiter : application à la campagne de phénomènes mutuels 2015

Abstract : The year 2015 was a favorable opportunity for the mutual event observations of the galilean satellites of Jupiter. Mutual events occur when the Earth and the Sun cross the common plane of their orbits. This configuration happens every six years when the apparent Jovian declinations of Earth and Sun become zero.During this campaign, we observed 236 events, and we received more than 600 light curves. We developed an astrometric reduction of these light curves based on an existing model. To reduce the light curves, we used Hapke’s model of reflectance and emittance.To improve the reduction method, we led an observational campaign to record photometric data of the galilean moons. This work was fundamental to upgrade the last photometric data on the galilean satellites. Ground based photometry of these moons had never been done in the methane band or in RGB bands.The astrometric data extracted from the light curves were used by V. Lainey to fit his dynamical model of the galilean satellites and build new ephemerides. Comparisons between ephemerides were made in order to evaluate the impact of the mutual event observations on the determination of the dynamical parameters.
Complete list of metadatas

Cited literature [181 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01887821
Contributor : Abes Star :  Contact
Submitted on : Thursday, October 4, 2018 - 3:12:07 PM
Last modification on : Saturday, September 19, 2020 - 4:50:49 AM
Long-term archiving on: : Saturday, January 5, 2019 - 3:35:40 PM

File

saquet_archivage_2017.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01887821, version 1

Citation

Eléonore Saquet. Photométrie et Astrométrie des Satellites de Jupiter : application à la campagne de phénomènes mutuels 2015. Astrophysique [astro-ph]. PSL Research University, 2017. Français. ⟨NNT : 2017PSLEO013⟩. ⟨tel-01887821⟩

Share

Metrics

Record views

206

Files downloads

70