=========================== ============================ Institut de mécanique céleste et de calcul des éphémérides /pub/ephem/satel/posxy 2006, April 4 =========================== ============================ SATEL/POSXY: Ephemerides of the main planetary satellites: tangential relative positions of the satellites of Mars, Jupiter,Saturn, Uranus, given under the form of developments in mixed functions. AUTHORS : J.-E. Arlot, Ch. Ruatti, D.T. Vu and W. Thuillot ADDRESS : IMCCE - UMR 8028 77 av. Denfert Rochereau, F-75014 PARIS Phone: (1) 40 51 22 67 / (1) 40 51 21 28 Fax: (1) 46 33 28 34 e-mail:arlot@imcce.fr, ruatti@imcce.fr, thuillot@imcce.fr CONTENTS: diffpos.f : FORTRAN source to be used with the files of satellites ephemerides whose names are 'planet.year'. This algorithm is founded on the mixed function representation by (Chapront and Vu, 1984). (12 Ko) diffposAix : executable software issued from the compiling of diffpos.f with AIX 3.2.5 & X11R5 1.2.4 system (31 Ko) diffposSun : executable software issued from the compiling of diffpos.f with SunOS Release 4.1.3_U1 (205 Ko) marsbin.YY : Binary file of coefficients of the satellites of Mars, Phobos and Deimos, for the year YY. These coefficients are computed from the Chapront-Touze's theory (Chapront-Touze, 1990). (20 Ko) jupibin.YY : Binary file of coefficients of the Galilean satellites for the year YY. These coefficients are computed from the original ephemeride is the G-5 ephemeride (Arlot, 1982) founded on the Sampson-Lieske theory (Sampson 1921, Lieske, 1977) (55 Ko) satubin.YY : Binary file of coefficients of the first eight satellites of Saturn for the year YY. These coefficients are computed from the theories of Dourneau (1993), Rapaport (1977), Kosai (1959) and Struve (1930). (55 Ko) uranbin.YY : Binary file of coefficients of the five main satellites of Uranus for the year YY. These coefficients are computed from the theory of Laskar and Jacobson (Laskar and Jacobson, 1987). (21 Ko) example : Example of an output data for several dates and satellites. (11 Ko) seqdir.f : FORTRAN program for the conversion of ASCII files of coefficients in direct access binary files: this program transforms the files named 'planete asc.YY' into the files named 'planete bin.YY' and used by diffpos.f (5 Ko) seqdirAix : executable software issued from the compiling of seqdir.f with AIX 3.2.5 & X11R5 1.2.4 system (16 Ko) seqdirSun : executable software issued from the compiling of seqdir.f with SunOS Release 4.1.3_U1 (188 Ko) marsasc.YY : ASCII file of the coefficients of the satellites of Mars, Phobos and Deimos, for the year YY. (40 Ko) jupiasc.YY : ASCII file of the coefficients of the Galilean satellites of Jupiter for the year YY. (110 Ko) satuasc.YY : ASCII file of the coefficients of the first eight satellites of Saturn for the year YY. (110 Ko) uranasc.YY : ASCII file of the coefficients of the five main satellites of Uranus for the year YY. (41 Ko) MORE...: The input data of diffpos.f are: - the date of a beginning of intervall in the Terrestrial Time scale (TT), - the step to use and the number of the planet concerned. The output data are the differential tangential coordinates of the satellites with respect to the center of the planet (in arcseconds). These coordinates are mean equatorial J2000 for all satellites. The Y axis is set towards the pole of the equator (North), the X axis towards the increasing right ascensions (East). The differences between TT and UTC are given in the following table: -------------------------------- period TT-UTC (sec.) -------------------------------- 1/7/94-1/1/96 61.184 1/1/96-1/7/97 62.184 1/7/97-1/1/99 63.184 1/1/99-1/1/06 64.184 1/1/06- 65.184 -------------------------------- BIBLIOGRAPHY: Arlot, J.-E.: 1982, Astron. Astrophys. 107, 305 Chapront, J., Vu, D.T.: 1984, Astron. Astrophys., 141, 131 Chapront-Touze, M.: 1990, 1990, Astron. Astrophys., 240, 159 Dourneau, G.: 1993, Astron. Astrophys., 267, 292 Kosai, Y.: 1959, Astron. J. 64, 367 Laskar, J., Jacobson, R.A.: 1987, Astron. Astrophys. 188, 212. Lieske, J.H.: 1977, Astron. Astrophys., 56, 333 Rapaport, M.: 1977, Astron. Astrophys., 62, 235 Sampson, R.A.: 1921, Mem. Roy. Astron. Soc. 63 Struve, G.: 1930, Astron. Astrophys., Veroff. Univ. Sternw. Berlin Babelsberg 6. ================================================================================ User feed-back is encouraged. Unless otherwise specified, send comments and bug reports to: E-mail : comments@imcce.fr Fax : (33) 1 46 33 28 34 Postal mail: IMCCE/observatoire de Paris 77 avenue Denfert Rochereau F-75014 PARIS ================================================================================