J/AJ/110/1420 Nutation of the Earth (Williams 1995)
Planetary-induced nutation of the Earth: direct terms
Williams J.G.
<Astron. J. 110, 1420 (1995)>
=1995AJ....110.1420W 1995AJ....110.1420W
ADC_Keywords: Earth
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 883yr are presented. The maximum nutation is
0.5mas. 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 68 161 Direct planetary-induced nutations
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 I1 --- ArgQ Mercury mean longitude multiplier (1)
3- 4 I2 --- ArgV Venus mean longitude multiplier (1)
5- 7 I3 --- ArgE Earth mean longitude multiplier (1)
8- 10 I3 --- ArgM Mars mean longitude multiplier (1)
12- 13 I2 --- ArgJ Jupiter mean longitude multiplier (1)
15- 16 I2 --- ArgS Saturn mean longitude multiplier (1)
18- 19 I2 --- ArgU Uranus mean longitude multiplier (1)
21- 22 I2 --- JPR Precession multiplier from J2000 (2)
24- 29 F6.1 uarcsec PsiSin Sine coefficient of nutation in longitude
31- 35 F5.1 uarcsec PsiCos Cosine coefficient of nutation in long.
37- 41 F5.1 uarcsec EpsSin Sine coefficient of nutation in obliquity
43- 47 F5.1 uarcsec EpsCos Cosine coefficient of nutation in obliq.
48- 57 D10.2 d Per Period in days
58- 65 D8.3 yr PerJY Period in Julian years
67- 68 I2 --- Deg Degree of term
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Note on (1): Integers which multiply the mean longitudes of the seven
planets Mercury-Uranus in the argument.
Note on (2): Integer multiplying precession accumulated from J2000 in the
argument.
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Origin: AAS CD-ROM series, Volume 5, 1995 Lee Brotzman [ADS] 30-Oct-1995
(End) [CDS] 25-Jan-1996