Construction of theories of motion, ephemerides, and databases for natural satellites of planets

Emel'Yanov, N. V.; Arlot, Jean-Eudes; Varfolomeev, M. I.; Vashkov'yak, S. N.; Kanter, A. A.; Kudryavtsev, S. M.; Nasonova, L. P.; Ural'Skaya, V. S.

doi:10.1134/s0010952506020055

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…The DE405 (Standish 1998) and INPOP (Fienga et al 2008) theories were used to calculate ephemerides of Uranus. The GUST86 (Laskar & Jacobson 1987) and GUST06 (Emelyanov et al 2006) theories were applied to compute the satellites' positions. As a result, the ephemerides of the satellites were calculated from combinations DE405+GUST86, DE405+GUST06, INPOP+GUST86 and INPOP+GUST06.…”

Section: Comparison With Theory Of Motionmentioning

confidence: 99%

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Astrometric observations of the Uranian satellites with the Faulkes Telescope North in 2007 September

Khovritchev¹

2009

Monthly Notices of the Royal Astronomical Society

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The results of astrometric observations of the main Uranian satellites taken with the Faulkes Telescope North are presented. A median filter algorithm was applied to subtract a scattered‐light halo caused by Uranus. The Two‐Micron All‐Sky Survey (2MASS) and USNO‐B1.0 were used as reference catalogues. The mean value of the differences between the equatorial coordinates of the satellites determined with 2MASS and USNO‐B1.0 is close to 200 mas. A comparison of the observed equatorial coordinates of the satellites and their relative positions with ephemerides based on different combinations of theories of motion of Uranus and its satellites (DE405+GUST86, DE405+GUST06, INPOP+GUST86, INPOP+GUST06) was performed. The satellites' positions obtained with respect to 2MASS are in better agreement with theories. The values of (O−C) of the equatorial coordinates determined with the 2MASS are mainly less than 100 mas. The majority of (O−C) of relative positions are within ±50 mas. The mean values of the standard errors of (O−C) are within 20 to 60 mas.

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Section: Comparison With Theory Of Motionmentioning

confidence: 99%

“…As a result, the ephemerides of the satellites were calculated from combinations DE405+GUST86, DE405+GUST06, INPOP+GUST86 and INPOP+GUST06. All calculations were performed with the ‘natural satellite service’ (Emelyanov et al 2006).…”

Section: Comparison With Theory Of Motionmentioning

confidence: 99%

Astrometric observations of the Uranian satellites with the Faulkes Telescope North in 2007 September

Khovritchev¹

2009

Monthly Notices of the Royal Astronomical Society

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“…Thus, an updated model of satellite motion would be used when it is needed for the production of the ephemeris. Such is the case of natural satellite ephemerides developed at IMCCE (Institut de mécanique céleste et de calcul des éphémérides) on the basis of a similar tool created at SAI (Sternberg Astronomical Institute) (Emelyanov 1996(Emelyanov , 2006. At http://www.imcce.fr/sat you may see our Natural Satellites Ephemeride Server.…”

Section: Introductionmentioning

confidence: 99%

Updated ephemeris of Phoebe, ninth satellite of Saturn

Emel'Yanov

2007

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Context. The theoretical model of natural satellite motion may need improvement each time new observations of a considerable amount are accumulated over a significant time interval. Aims. The goal of our work is to elaborate the ephemeris of Phoebe based on all ground-based observations available to date and readily accessible for any user via the Internet. Methods. Our model for the orbit of Phoebe is based on numerical integration of the equations of motion. In the theory of satellite motion, all necessary perturbations were taken into account. To produce the ephemeris of Phoebe, we used a database that contains all published ground-based observations and expands constantly as new observations appear. Results. The new ephemeris of Phoebe, based on 1606 ground-based observations made at 39 observatories in the 103 year time interval, was elaborated. The real precision of the ephemeris is limited by the observational precision and is not worse than 0.15 . The ephemeris is available at: http://www.imcce.fr/sat and http://www.sai.msu.ru/neb/nss/index.htm. The ephemeris of Phoebe will be updated as new observations become available.

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“…As such, this is perhaps the most detailed long-term orbital simulation of the irregular satellites because it uses our full dynamical model without shortcuts (e.g., replacing the large moons of Uranus by uniform circular equatorial rings as in Roy et al 1988;Brozović & Jacobson 2009). Emelyanov & Kanter (2005) and Emelyanov et al (2006) also modeled the perturbing major satellites as uniform rings located along the circular orbits, but they applied this simplified approach only for the duration of the data arc.…”

Section: Osculating and Mean Elementsmentioning

confidence: 99%

“…Jacobson et al (2012) provided an update based on the observational campaign that attempted to provide additional measurements for the irregular satellites that were on the verge of being lost. Other ephemerides for the irregulars were published in Emelyanov & Kanter (2005) and Emelyanov et al (2006).…”

Section: Introductionmentioning

confidence: 99%

Orbits of the Irregular Satellites of Uranus and Neptune

Brozović

Jacobson

2022

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We report on an ephemerides update for the irregular satellites of Uranus and Neptune, including Nereid. Our data set contains ground-based and Voyager 2 position measurements of the satellites. Some of the new observations were reduced with respect to the GAIA star catalog and represent high-quality, modern astrometry. The orbital fits are based on the numerically integrated equations of motion. We summarized results in terms of state vectors, orbital uncertainties, and mean elements. A large number of the irregulars have not been followed up in over a decade, and our study shows that their orbits still contain significant uncertainties.

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Construction of theories of motion, ephemerides, and databases for natural satellites of planets

Cited by 10 publications

References 15 publications

Astrometric observations of the Uranian satellites with the Faulkes Telescope North in 2007 September

Astrometric observations of the Uranian satellites with the Faulkes Telescope North in 2007 September

Updated ephemeris of Phoebe, ninth satellite of Saturn

Orbits of the Irregular Satellites of Uranus and Neptune

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