Mutual phenomena of the Galilean and Saturnian satellites in 1973 and 1979/1980

Aksnes, K.; Franklin, F. A.; Millis, R. L.; Birch, P. V.; Blanco, C.; Catalano, S.; Piironen, J.

doi:10.1086/113511

Cited by 46 publications

(30 citation statements)

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“…Fifteen years later, the PHESAT95 campaign organized by the actual IMCCE collected 65 light curves (see Thuillot et al 2001). In Noyelles, Vienne & Descamps (2003) we obtained 16 positions in which we are very confident and 32 in which we are confident, and re-reduced some light curves performed in 1980 in Japan by Soma & Nakamura (1982) already reduced by Aksnes et al (1984). The residuals for the best observations are about 20 − 30 mas.…”

Section: Case Of the Saturnian Satellitessupporting

confidence: 55%

“…The first astrometric results of Saturnian satellites were published by Aksnes et al (1984) after observing 14 mutual events in 1980 around the world, and reducing without taking account of the anisotropy of light scattering by the surface of the satellites. Fifteen years later, the PHESAT95 campaign organized by the actual IMCCE collected 65 light curves (see Thuillot et al 2001).…”

Section: Case Of the Saturnian Satellitesmentioning

confidence: 99%

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Observation and reduction of mutual events in the solar system

2004

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Abstract. Mutual event observations started in the early 1970s with the Galilean satellites. These observations were needed because of the Voyager spacecraft future arrival. Since 1979, IMCCE has organized observational campaigns for the Galilean satellites (called PHEMU), and since 1995 for the Saturnian satellites (also called PHESAT). Meanwhile, the reduction techniques have been greatly improved. Mutual event observations are one of the most accurate methods for obtaining positions of natural satellites, useful for detecting tidal effects. Hence mutual events of Jovian and Saturnian natural satellites are regularly observed around the world. This paper aims to describe mutual events and the advantages of this kind of observation besides the classical astrometric ones.

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Section: Case Of the Saturnian Satellitessupporting

confidence: 55%

Section: Case Of the Saturnian Satellitesmentioning

confidence: 99%

Observation and reduction of mutual events in the solar system

2004

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“…Positional data can be derived from the photometry of satellites during such events. For a description of specific features of the mutual occultations and eclipses of satellites and for brief reviews of observations see Aksnes & Franklin (1976), Aksnes et al (1984), Arlot (1984), Franklin et al (1991), Arlot et al (1992), Vasundhara (1994), Emel'yanov (1995), Emelianov et al (1999), Kaas et al (1999), Emel'yanov (2000), Emelianov et al (2000), Emel'yanov & Vashkov'yak (2001), and Vasundhara et al (2003).…”

Section: Introductionmentioning

confidence: 99%

“…Vasundhara (1994) performed astrometric reduction of 1991 observations of mutual occultations and eclipses of the Galilean satellites. Aksnes & Franklin (1976), Aksnes et al (1984), Franklin et al (1991), and Kaas et al (1999) developed an approximate method for systematically infering and publishing the differences in the topocentric coordinates of the Galilean satellites based on the photometry of their mutual occultations and eclipses.…”

Section: Introductionmentioning

confidence: 99%

Astrometric results of observations of mutual occultations and eclipses of the Galilean satellites of Jupiter in 2003

Emelyanov

Gilbert

2006

A&A

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Context. The photometry of mutual occultations and the eclipses of natural planetary satellites can be used to infer very accurate astrometric data. This can be achieved by analyzing the light curves of the satellites observed during these mutual events. Aims. The final goal of observations is to refine the models of motion for the natural satellites, and to develop a very accurate photometric model of mutual occultations and eclipses of satellites. This paper is focusing on the differences of topocentric or heliocentric coordinates of satellites pairs by analyzing the photometry of mutual occultations and the eclipses of natural satellites. Methods. We propose the most accurate photometric model of mutual events to date based on all available data about the satellites, and have developed the corresponding method for extracting astrometric data. We analyze the errors of astrometric results obtained in terms of different scattering laws allowing for reflecting properties of the satellites surfaces. In addition we consider how to allow various previously neglected effects. Results. We describe the results obtained by applying our method to observations of mutual occultations and eclipses of the Galilean satellites of Jupiter made in [2002][2003]. We show that the coordinate errors due to irreducible systematic errors of photometry are about the same as the errors introduced by neglecting the above effects. We find the available maps of satellites surfaces to be unsuitable for deriving photometric event models.

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“…We computed 441 mutual events, although only 123 were easily observable. Before 2009, several Light curves are available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/544/A29 observational campaigns were completed during previous occurrences (Thuillot et al 2001;Aksnes et al 1984). Table 1 presents the results derived for each campaign until the present one.…”

Section: The Mutual Eventsmentioning

confidence: 99%

Astrometric results of observations of mutual occultations and eclipses of the Saturnian satellites in 2009

Arlot

Emelyanov

Lainey

et al. 2012

A&A

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Context. The photometry of mutual occultations and eclipses of natural planetary satellites can be used to infer very accurate astrometric data. This can be achieved by processing the light curves of the satellites observed during international campaigns of photometric observations of these mutual events.Aims. This work focuses on processing the complete database of photometric observations of the mutual occultations and eclipses of the Saturnian satellites made during the international campaign in 2009. The final goal is to derive new accurate astrometric data. Methods. We develop an accurate photometric model of mutual event observations of sufficiently high accuracy. Our original method is applied to derive astrometric data from photometric observations of the mutual occultations and eclipses of the Saturnian satellites. Results. We process the 26 light curves obtained during the international campaign of photometric observations of the Saturnian satellites in 2009. Compared with the theory TASS 1.7 by Vienne and Duriez, we find that the root mean square of the "O-C" residuals for the 23 highest quality observations are equal to 48.5 and 21.7 mas in right ascension and declination, respectively, we obtain 16.4 and 20.7 mas with the new theory by Lainey and collaborators and 17.3 and 21.6 mas with JPL SAT351 ephemerides. Topocentric or heliocentric angular differences for satellites pairs are obtained for 16 time instants during the time period

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Mutual phenomena of the Galilean and Saturnian satellites in 1973 and 1979/1980

Cited by 46 publications

References 0 publications

Observation and reduction of mutual events in the solar system

Observation and reduction of mutual events in the solar system

Astrometric results of observations of mutual occultations and eclipses of the Galilean satellites of Jupiter in 2003

Astrometric results of observations of mutual occultations and eclipses of the Saturnian satellites in 2009

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