CDROM/AJ/V110/P1420 Nutation of the Earth (Williams 1995) ================================================================================ Planetary-Induced Nutation of the Earth: Direct Terms James G. Williams <1995, AJ, 110, 1420> =1995AJ....110.1420W ================================================================================ Abstract: Small torques by the planets can alter the direction of the Earth's rotation axis in space. These direct planetary-induced nutations have been computed using a numerical technique. 62 nutation terms with periods between 0.2 and 883 yr are presented. The maximum nutation is 0.5 marcsec. Also given are planetary-induced rates and accelerations of precession and obliquity. Description: Full caption for table 2: Direct planetary-induced nutations with amplitudes in longitude larger than 0.5 microarcsec. Each argument consists of a linear combination of the mean longitudes of the seven planets Mercury- Uranus, and the general precession p accumulated from J2000. The degree is the implicit power of the planetary eccentricities and inclinations. File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table2.dat 68 163 Direct planetary-induced nutations -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat table3.dat table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1 I1 --- Arg_Q *Mercury mean longitude multiplier 2- 4 I3 --- Arg_V *Venus mean longitude multiplier 5- 7 I3 --- Arg_E *Earth mean longitude multiplier 8-10 I3 --- Arg_M *Mars mean longitude multiplier 11-13 I3 --- Arg_J *Jupiter mean longitude multiplier 14-16 I3 --- Arg_S *Saturn mean longitude multiplier 17-19 I3 --- Arg_U *Uranus mean longitude multiplier 20-22 I3 --- JPR Precession multiplier from J2000 23 1X --- --- Blank 24-29 F6.1 uarcsec Psi_sin Sine coefficient of nutation in longitude 30-35 F6.1 uarcsec Psi_cos Cosine coefficient of nutation in long. 36-41 F6.1 uarcsec Eps_sin Sine coefficient of nutation in obliquity 42-47 F6.1 uarcsec Eps_cos Cosine coefficient of nutation in obliq. 48-57 D10.2 day Pd Period in days 58-65 D8.3 yr Py Period in Julian years 66-68 I3 --- Deg Degree of term -------------------------------------------------------------------------------- Notes for file: table2.dat -------------------------------------------------------------------------------- Arg_Q, Arg_V, Arg_E, Arg_M, Arg_J, Arg_S, Arg_U: Integers which multiply the mean longitudes of the seven planets Mercury-Uranus in the argument. JPR: Integer multiplying precession accumulated from J2000 in the argument. -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 30-Oct-1995