Mutual positions of the Galilean satellites of Jupiter from photometric observations during their mutual occultations and eclipses in 1997

N.V. Emelianov ¹ - A.A. Berejnoi ² - S.N. Vashkovjak ¹ - E.A. Glushkova ³ - S.Yu. Gorda ⁴ - A. Delets ⁵ - T.N. Dorokhova ⁶ - N.I. Dorokhov ⁶ - V.F. Esipov ¹ - I.S. Izmailov ⁷ - T.R. Irsmambetova ¹ - A.A. Kiselev ⁷ - T.P. Kiseleva ⁷ - V.G. Kornilov ¹ - V. Kucherov ⁵ - I. Ledovskaya ⁵ - S. Mukhamednazarov ⁶ - V.N. Raskhozhev ² - V.G. Tejfel ³ - G.A. Charitonova ³

1 - Sternberg Astronomical Institute, 13 Universitetskij prospect, 119899 Moscow, Russia
e-mail: emelia@sai.msu.su
2 - Observatory of Voronezh State University, Voronezh, Russia
3 - Fesenkov Astrophysical Institute, Kamenskoye Plato, 480068 Almaty, Kazakhstan
e-mail: tejf@afi.academ.alma-ata.su
4 - Kourovka observatory of Ural state university, Ekaterinburg, Russia
e-mail: Stanislav.Gorda@usu.ru
5 - Main Astronomical Observatory of the Ukrainian Academy of Science, Kiev, Ukraine
e-mail: leda@mao.kiev.ua
6 - Odessa State University, Odessa, Ukraine
e-mail: tnd@pulse.tenet.odessa.ua
7 - Main Astronomical Observatory, Pulkovo, 196140 St.-Petersburg, Russia
e-mail: aak@pulvz.spb.su

Abstract:

We report the final results of the 1997 campaign of photometric observations of the mutual phenomena of the Galilean satellites carried out at observatories in Kazakhstan, Russia, and Ukraine. Our results contribute substantially to the world data bank of such observations and will allow the model of the motion of Galilean satellites to be further refined. To facilitate the use of photometric data, we reduced them by computing the planetocentric rectangular coordinate differences of satellite pairs for a number of instants of time so we deduce the differences for one instant from one observed light curve. It is these reduced data that constitute the principal result of this work. We based our data reduction on the method which we developed in earlier papers (Emel'yanov 1999; Emel'yanov 2000). The accuracy of observations was estimated in the process of reduction. The paper also describes the equipment used.

Key words: planets and satellites: Jupiter -- techniques: photometric