% SIRTAB.TEX 03-11-94 % % tables pour publi electronique % article pour Astron.Astrophys. % sur Sirius % % page 1: titre % 2: abstract et key-words % 3: appendix % 25: table 2 % 26: table 3 % \magnification 1200 \hsize 15.truecm \vsize 23.truecm \parskip 0mm \parindent 1.truecm \def\ref{\par\parskip 0mm\parindent 0mm\hangindent=5.truemm\hangafter=1} \def\le{\leftline} \def\ce{\centerline} \def\ala{\hfil\break} % page 1: titre \line{} \line{} \line{} \line{} \ce{Is Sirius a triple star?} \line{} \line{} \line{} \ce{D. Benest$^1$, J.L. Duvent$^2$} \line{} \ce{$^1$O.C.A. Observatoire de Nice, B.P. 229, F-06304 Nice Cedex 4, France} \ce{$^2$1, All\'ee des Sauliers, F-91160 Longjumeau, France} \vfil \ce{submitted: September 1994} \ce{revised: October 1994} \line{} \line{} \ce{------------------} \vfil \le{Proposed to: Astronomy and Astrophysics} \le{\phantom{submitted to: }Main Journal} \le{\phantom{submitted to: }Section: Celestial Mechanics and Astrometry} \line{} \line{} \le{Thesaurus code numbers: 03.13.2} \le{\phantom{Thesaurus code numbers: }03.13.4} \le{\phantom{Thesaurus code numbers: }05.03.1} \le{\phantom{Thesaurus code numbers: }08.02.3} \le{\phantom{Thesaurus code numbers: }08.09.2 Sirius} \line{} \line{} \le{Address for proofs: D.Benest, Observatoire de Nice} \eject % page 2: abstract et key-words \baselineskip=20pt \line{} \noindent{\bf Abstract.} Sirius has been discovered as double more than 130 years ago. From the beginning of our century up to now, observational as well as physical and dynamical indications lead to the hypothesis of the existence of a third body in the system. In this paper, we present recent orbital analysis of the binary Sirius A-B which, helped by numerical simulation of triple systems, strengthens the idea for the triplicity of Sirius: a tiny star could revolve in about 6 years around Sirius A\footnote{$^{(\star)}$}{Tables 2 and 3, and the table in Appendix are available in electronic form at the CDS via {\it anonymous ftp 130.79.128.5}.}. Finally, we discuss the possibility of direct detection for this suspected Sirius C. \par \vskip 2cm \noindent {\bf Key words:} Binary: Sirius - Celestial mechanics: orbital analysis, numerical simulation - Triple star? \vfil \eject % page 3: appendix \noindent {\bf Appendix: Observations of Sirius (1862-1979)} \settabs 5\columns \line{} \hrule \line{} \+ Date & $\theta$ & $\rho$ & Nb & Name \cr \line{} \hrule \line{} \+ 1862.19 & 84.6 & 10.07 & 6 & bdg \cr \+ 1862.20 & 85.0 & 10.09 & 5 & rut \cr \+ 1862.23 & 84.5 & 10.42 & 2 & chc \cr \+ 1863.21 & 83.8 & 10.15 & 2 & stt \cr \+ 1863.21 & 81.3 & 9.54 & 6 & rut \cr \+ 1863.27 & 82.8 & 9.54 & 1 & bdg \cr \+ 1864.14 & 79.4 & 10.60 & 3 & mth \cr \+ 1864.18 & 80.1 & 9.64 & 1 & lsl \cr \+ 1864.22 & 78.6 & 10.70 & 2 & bdg \cr \+ 1864.22 & 78.1 & 10.89 & 3 & stt \cr \+ 1864.23 & 84.9 & 10.0 & 1 & da \cr \+ 1864.23 & 78.7 & 10.05 & 1 & wnc \cr \+ 1865.10 & 78.9 & 10.05 & 3 & lsl \cr \+ 1865.20 & 78.4 & 10.64 & 2 & stt \cr \+ 1865.22 & 75.5 & 9.59 & 8 & se \cr \+ 1865.23 & 77.8 & 10.77 & 4 & foe \cr \+ 1865.25 & 76.9 & 10.77 & 3 & ttj \cr \+ 1865.26 & 76.9 & 9.0 & 1 & en \cr \+ 1866.07 & 77.2 & 10.43 & 1 & knt \cr \+ 1866.21 & 77.2 & 10.74 & 1 & brh \cr \+ 1866.20 & 76.9 & 10.94 & 3 & stt \cr \+ 1866.20 & 73.9 & 10.97 & 1 & ttj \cr \+ 1866.20 & 74.1 & 11.29 & 1 & foe \cr \+ 1866.23 & 74.0 & 10.17 & 2 & hl \cr \+ 1866.23 & 74.9 & 10.57 & 3 & nes \cr \+ 1866.25 & 78.6 & 10.34 & 1 & tut \cr \+ 1866.26 & 75.1 & 10.36 & 2 & eas \cr \+ 1866.29 & 71.3 & 10.11 & 3 & se \cr \+ 1867.10 & 73.8 & 10.66 & 5 & sea \cr \+ 1867.19 & 72.5 & 11.15 & 6 & win \cr \+ 1867.24 & 73.3 & 10.93 & 1 & stt \cr \+ 1867.24 & 72.3 & 10.93 & 2 & foe \cr \+ 1867.24 & 73.1 & 10.93 & 1 & fus \cr \+ 1867.28 & 74.9 & 9.46 & 2 & eas \cr \+ 1868.01 & 73.2 & 10.25 & 2 & sea \cr \+ 1868.04 & 72.1 & 10.25 & 1 & pei \cr \+ 1868.20 & 70.1 & 11.48 & 1 & stt \cr \+ 1868.21 & 70.3 & 11.29 & 1 & foe \cr \+ 1868.22 & 69.3 & 10.63 & 5 & auw \cr \+ 1868.23 & 70.3 & 11.25 & 7 & vog \cr \+ 1868.24 & 69.6 & 11.35 & 5 & brh \cr \+ 1868.26 & 71.7 & 10.95 & 5 & en \cr \+ 1869.10 & 74.7 & 10.26 & 4 & brn \cr \+ 1869.15 & 73.6 & 11.23 & 3 & vog \cr \+ 1869.20 & 68.6 & 11.26 & 1 & du \cr \+ 1869.20 & 68.6 & 11.07 & 2 & win \cr \+ 1869.23 & 70.8 & 10.93 & 1 & pei \cr \+ 1869.23 & 68.9 & 10.97 & 3 & stt \cr \+ 1870.13 & 67.9 & 11.16 & 4 & pei \cr \+ 1870.17 & 65.9 & 11.06 & 5 & win \cr \+ 1870.22 & 66.5 & 11.32 & 4 & stt \cr \+ 1870.24 & 65.1 & 12.06 & 5 & vog \cr \+ 1871.16 & 65.9 & 10.75 & 3 & se \cr \+ 1871.20 & 70.3 & 11.19 & 1 & pei \cr \+ 1871.23 & 64.0 & 11.21 & 2 & du \cr \+ 1871.24 & 64.0 & 11.82 & 1 & stt \cr \+ 1871.25 & 60.1 & 12.1 & 3 & pec \cr \+ 1872.10 & 63.4 & 11.51 & 5 & pei \cr \+ 1872.18 & 59.8 & 11.14 & 2 & du \cr \+ 1872.21 & 67.1 & 10.75 & 3 & brg \cr \+ 1872.22 & 63.6 & 11.95 & 2 & stt \cr \+ 1872.24 & 62.4 & 11.50 & 1 & nes \cr \+ 1872.24 & 64.3 & 11.46 & 5 & hl \cr \+ 1872.26 & 61.3 & 11.46 & 3 & ski \cr \+ 1873.20 & 65.8 & 11.12 & 1 & hl \cr \+ 1873.22 & 60.5 & 11.26 & 3 & stt \cr \+ 1873.22 & 60.9 & 10.65 & 1 & du \cr \+ 1873.23 & 70.0 & 9.80 & 1 & brg \cr \+ 1873.23 & 66.3 & 10.42 & 1 & brh \cr \+ 1873.93 & 65.0 & 11.29 & 1 & jw \cr \+ 1874.15 & 59.2 & 11.59 & 8 & nes \cr \+ 1874.19 & 58.7 & 11.99 & 1 & hld \cr \+ 1874.22 & 60.9 & 11.69 & 1 & stt \cr \+ 1874.23 & 58.0 & 11.10 & 2 & hl \cr \+ 1874.83 & 57.5 & (11.10?) & 1 & btn \cr \+ 1875.19 & 57.1 & 10.81 & 4 & du \cr \+ 1875.21 & 56.7 & 11.42 & 2 & nes \cr \+ 1875.21 & 55.9 & 11.89 & 4 & hld \cr \+ 1875.23 & 57.8 & 10.50 & 1 & stt \cr \+ 1875.28 & 56.4 & 11.08 & 4 & hl \cr \+ 1876.03 & 57.8 & 11.12 & 1 & wat \cr \+ 1876.05 & 54.6 & 11.45 & 1 & pet \cr \+ 1876.09 & 54.9 & 11.82 & 6 & hld \cr \+ 1876.14 & 55.0 & 11.55 & 4 & r \cr \+ 1876.22 & 55.2 & 11.19 & 6 & hl \cr \+ 1876.23 & 58.3 & 11.35 & 1 & stt \cr \+ 1877.10 & 53.6 & 11.30 & 1 & hwe \cr \+ 1877.16 & 52.8 & 11.35 & 4 & hld \cr \+ 1877.11 & 52.6 & 11.15 & 2 & upt \cr \+ 1877.23 & 55.9 & 10.91 & 2 & stt \cr \+ 1877.26 & 53.4 & 10.95 & 5 & hl \cr \+ 1877.97 & 52.4 & 10.87 & 8 & bu \cr \+ 1878.07 & 50.5 & 11.07 & 4 & hld \cr \+ 1878.14 & 51.2 & 10.84 & 2 & hwe \cr \+ 1878.17 & 51.0 & 10.58 & 2 & stn \cr \+ 1878.19 & 54.4 & 11.24 & 5 & prt \cr \+ 1878.22 & 53.2 & 11.4 & 3 & eas \cr \+ 1878.22 & 48.6 & 10.37 & 2 & stt \cr \+ 1878.24 & 51.7 & 10.76 & 5 & hl \cr \+ 1879.05 & 50.7 & 10.44 & 9 & bu \cr \+ 1879.05 & 50.7 & 10.44 & 1 & bu \cr \+ 1879.10 & 47.8 & 11.25 & 6 & hld \cr \+ 1879.16 & 48.8 & 10.54 & 2 & stn \cr \+ 1879.15 & 50.3 & 10.78 & 5 & prt \cr \+ 1879.16 & 50.0 & 10.44 & 3 & hwe \cr \+ 1879.20 & 50.1 & 10.55 & 6 & hl \cr \+ 1879.22 & 46.2 & 11.05 & 3 & stt \cr \+ 1879.75 & 46.5 & 10.29 & 1 & stn \cr \+ 1880.00 & 48.8 & 10.55 & 1 & r \cr \+ 1880.04 & 50.2 & 10.4 & 1 & gld \cr \+ 1880.10 & 47.1 & 10.48 & 4 & hld \cr \+ 1880.11 & 48.3 & 10.00 & 9 & bu \cr \+ 1880.11 & 48.3 & 10.00 & 1 & bu \cr \+ 1880.17 & 49.6 & 9.87 & 3 & ho \cr \+ 1880.17 & 47.6 & 10.37 & 2 & prt \cr \+ 1880.18 & 46.7 & 9.92 & 4 & big \cr \+ 1880.22 & 51.1 & (9.92?) & 1 & sm \cr \+ 1880.25 & 47.8 & 10.30 & 8 & hl \cr \+ 1880.28 & 48.6 & 10.38 & 2 & frs \cr \+ 1881.07 & 46.3 & 9.77 & 8 & bu \cr \+ 1881.12 & 46.7 & 10.74 & 2 & hld \cr \+ 1881.14 & 44.3 & 10.02 & 3 & big \cr \+ 1881.16 & 46.8 & 9.8 & 4 & gld \cr \+ 1881.16 & 45.6 & (9.8?) & 1 & mnl \cr \+ 1881.17 & 43.2 & 10.11 & 6 & frs \cr \+ 1881.17 & 44.3 & 9.94 & 2 & prt \cr \+ 1881.18 & 46.7 & 9.79 & 6 & yng \cr \+ 1881.26 & 45.3 & 9.60 & 5 & ho \cr \+ 1881.26 & 45.3 & 10.00 & 6 & hl \cr \+ 1881.99 & 43.6 & 9.38 & 9 & bu \cr \+ 1881.99 & 43.6 & 9.38 & 2 & bu \cr \+ 1881.99 & 41.6 & 9.51 & 2 & stn \cr \+ 1882.11 & 41.2 & 9.68 & 1 & jw \cr \+ 1882.12 & 43.0 & 9.49 & 1 & prt \cr \+ 1882.13 & 43.1 & 9.30 & 9 & ho \cr \+ 1882.13 & 42.4 & 9.76 & 3 & big \cr \+ 1882.18 & 42.2 & 9.95 & 6 & frs \cr \+ 1882.20 & 46.1 & (9.95?) & 4 & en \cr \+ 1882.23 & 42.5 & 9.67 & 7 & hl \cr \+ 1883.10 & 40.1 & 9.05 & 9 & bu \cr \+ 1883.10 & 40.1 & 9.05 & 1 & bu \cr \+ 1883.10 & 39.0 & 9.41 & 1 & yng \cr \+ 1883.12 & 39.7 & 9.02 & 9 & ho \cr \+ 1883.12 & 39.7 & 9.02 & 2 & ho \cr \+ 1883.14 & 41.3 & (9.02?) & 1 & jw \cr \+ 1883.17 & 41.4 & 9.75 & 7 & frs \cr \+ 1883.19 & 39.9 & 9.10 & 1 & big \cr \+ 1883.21 & 39.7 & (9.10?) & 2 & en \cr \+ 1883.21 & 39.1 & 9.26 & 6 & hl \cr \+ 1884.05 & 36.0 & 9.67 & 6 & per \cr \+ 1884.11 & 36.0 & 8.59 & 2 & jw \cr \+ 1884.17 & 35.3 & 8.79 & 1 & big \cr \+ 1884.18 & 36.7 & 8.51 & 9 & ho \cr \+ 1884.18 & 36.7 & 8.51 & 2 & ho \cr \+ 1884.19 & 36.4 & 8.39 & 9 & bu \cr \+ 1884.19 & 36.4 & 8.39 & 1 & bu \cr \+ 1884.22 & 38.2 & 8.00 & 1 & stt \cr \+ 1884.23 & 37.7 & 8.81 & 8 & hl \cr \+ 1884.27 & 36.3 & 8.70 & 4 & yng \cr \+ 1884.93 & (36.3?) & 8.01 & 1 & mnl \cr \+ 1885.11 & 34.1 & 8.09 & 8 & yng \cr \+ 1885.15 & 31.5 & 7.74 & 1 & jw \cr \+ 1885.20 & 32.7 & 7.96 & 9 & ho \cr \+ 1885.20 & 32.7 & 7.96 & 1 & ho \cr \+ 1885.27 & 34.7 & 8.06 & 6 & hl \cr \+ 1886.04 & 33.4 & (8.06?) & 1 & lv \cr \+ 1886.05 & 29.8 & 7.59 & 3 & yng \cr \+ 1886.14 & 28.7 & 7.21 & 9 & ho \cr \+ 1886.14 & 28.7 & 7.21 & 3 & ho \cr \+ 1886.15 & 28.7 & 6.80 & 2 & jw \cr \+ 1886.21 & 31.2 & 7.38 & 6 & hl \cr \+ 1887.14 & 25.4 & 7.08 & 4 & yng \cr \+ 1887.19 & 23.7 & 6.78 & 7 & ho \cr \+ 1887.23 & 24.2 & 6.51 & 4 & hl \cr \+ 1888.24 & 23.3 & 5.78 & 3 & hl \cr \+ 1888.97 & 13.9 & 5.27 & 5 & bu \cr \+ 1890.27 3& 59.7 & 4.19 & 3 & bu \cr \+ 1896.83 1& 89.1 & 3.69 & 2 & a \cr \+ 1896.85 1& 89.2 & 3.73 & 4 & she \cr \+ 1897.16 1& 85.4 & 3.88 & 3 & a \cr \+ 1897.21 1& 86.6 & 3.78 & 1 & hu \cr \+ 1897.80 1& 73.9 & 4.63 & 4 & see \cr \+ 1897.83 1& 73.7 & 4.95 & 2 & boo \cr \+ 1897.84 1& 75.2 & 3.95 & 3 & she \cr \+ 1897.94 1& 75.0 & 4.01 & 2 & hu \cr \+ 1897.95 1& 73.1 & 4.11 & 5 & a \cr \+ 1898.21 1& 79.2 & 4.68 & 1 & l \cr \+ 1898.27 1& 68.9 & 4.79 & 3 & see \cr \+ 1898.27 1& 70.7 & 4.86 & 3 & boo \cr \+ 1899.06 1& 57.3 & 4.37 & 3 & a \cr \+ 1899.09 1& 57.6 & 4.31 & 5 & hu \cr \+ 1899.51 1& 61.7 & 4.78 & 1 & brs \cr \+ 1899.21 1& 70.7 & 4.79 & 1 & brs \cr \+ 1899.85 1& 50.3 & 4.76 & 3 & bar \cr \+ 1899.90 1& 45.6 & 4.53 & 4 & a \cr \+ 1900.17 1& 50.5 & 4.63 & 6 & see \cr \+ 1900.41 1& 42.8 & 4.75 & 3 & hu \cr \+ 1901.25 1& 35.0 & 5.13 & 3 & a \cr \+ 1901.30 1& 42.7 & 5.10 & 4 & see \cr \+ 1902.01 1& 29.4 & 5.60 & 2 & bar \cr \+ 1902.18 1& 27.1 & 5.46 & 6 & hu \cr \+ 1902.24 1& 27.7 & 5.49 & 3 & a \cr \+ 1902.24 1& 32.2 & 5.38 & 4 & see \cr \+ 1903.03 1& 20.4 & 5.87 & 3 & a \cr \+ 1903.11 1& 20.0 & 6.10 & 5 & bar \cr \+ 1903.12 1& 27.8 & 6.31 & 1 & doo \cr \+ 1903.16 1& 20.0 & 5.97 & 2 & hu \cr \+ 1903.22 1& 20.8 & 5.10 & 2 & wno \cr \+ 1903.81 1& 15.4 & 6.32 & 2 & bar \cr \+ 1904.18 1& 21.2 & 6.5 & 1 & vbs \cr \+ 1904.19 1& 12.9 & 5.82 & 1 & l \cr \+ 1904.80 1& 09.1 & 6.92 & 1 & hu \cr \+ 1904.85 1& 11.1 & 6.99 & 3 & bar \cr \+ 1904.98 1& 09.6 & 6.85 & 3 & a \cr \+ 1906.08 1& 03.8 & 7.42 & 2 & a \cr \+ 1906.11 1& 04.7 & 6.95 & 3 & ol \cr \+ 1906.96 1& 00.9 & 7.85 & 3 & bar \cr \+ 1907.00 1& 00.0 & 7.83 & 3 & a \cr \+ 1907.16 & 99.3 & (7.83?) & 6 & loh \cr \+ 1907.20 & 99.4 & 7.74 & 2 & com \cr \+ 1908.11 & 95.5 & 6.88 & 6 & loh \cr \+ 1908.17 & 96.1 & 8.52 & 6 & bar \cr \+ 1908.20 & 95.9 & 8.38 & 2 & a \cr \+ 1908.22 & 97.7 & 8.43 & 4 & doo \cr \+ 1908.26 & 95.0 & 8.44 & 2 & com \cr \+ 1908.86 & 94.2 & 8.70 & 4 & bu \cr \+ 1909.06 & 93.3 & 8.62 & 5 & neb \cr \+ 1909.09 & 92.0 & 8.56 & 4 & ol \cr \+ 1909.14 & 92.5 & 8.75 & 9 & bar \cr \+ 1909.14 & 92.5 & 8.75 & 1 & bar \cr \+ 1909.17 & 94.4 & 8.67 & 2 & fox \cr \+ 1909.25 & 91.6 & 8.70 & 2 & a \cr \+ 1910.10 & 91.5 & 9.45 & 6 & fox \cr \+ 1910.11 & 89.1 & 9.07 & 8 & bar \cr \+ 1910.18 & 88.9 & 9.05 & 2 & a \cr \+ 1911.00 & 89.6 & 9.65 & 7 & fox \cr \+ 1911.03 & 88.4 & 9.29 & 6 & vou \cr \+ 1911.07 & 89.1 & 9.61 & 3 & wz \cr \+ 1911.10 & 87.1 & 8.75 & 4 & j \cr \+ 1911.10 & 87.6 & 9.45 & 2 & doo \cr \+ 1911.21 & 85.2 & 9.38 & 3 & a \cr \+ 1911.50 & 86.2 & 9.64 & 9 & bar \cr \+ 1911.50 & 86.2 & 9.64 & 3 & bar \cr \+ 1911.92 & 86.9 & 9.84 & 5 & fox \cr \+ 1911.94 & 85.1 & 9.69 & 8 & i \cr \+ 1912.07 & 84.7 & 9.38 & 6 & vou \cr \+ 1912.08 & 83.4 & 9.58 & 2 & a \cr \+ 1912.15 & 84.7 & 9.82 & 6 & i \cr \+ 1912.24 & 85.4 & 9.39 & 2 & com \cr \+ 1913.05 & 82.3 & 9.96 & 9 & bar \cr \+ 1913.05 & 82.3 & 9.96 & 6 & bar \cr \+ 1913.06 & 83.4 & 10.27 & 4 & fox \cr \+ 1913.07 & 83.1 & 9.65 & 7 & vou \cr \+ 1913.14 & 82.6 & 10.03 & 1 & gro \cr \+ 1913.16 & 80.5 & 9.85 & 4 & i \cr \+ 1913.18 & 81.7 & 10.02 & 2 & a \cr \+ 1913.25 & 81.6 & 9.22 & 2 & j \cr \+ 1913.29 & 82.4 & 9.72 & 2 & doo \cr \+ 1914.02 & 79.6 & 10.24 & 4 & vou \cr \+ 1914.05 & 80.6 & 10.35 & 2 & fox \cr \+ 1914.15 & 79.1 & 10.25 & 5 & bar \cr \+ 1914.19 & 78.6 & 10.23 & 4 & i \cr \+ 1914.24 & 79.8 & 10.00 & 4 & doo \cr \+ 1914.77 & 79.0 & 9.88 & 4 & j \cr \+ 1914.81 & 71.2 & 10.4 & 6 & rab \cr \+ 1915.07 & 78.9 & 10.01 & 6 & j \cr \+ 1915.10 & 76.7 & 10.39 & 5 & vou \cr \+ 1915.13 & 76.2 & 10.74 & 3 & a \cr \+ 1915.16 & 76.8 & 10.63 & 2 & com \cr \+ 1915.18 & 76.4 & 10.50 & 4 & i \cr \+ 1915.41 & 76.6 & 10.47 & 4 & ol \cr \+ 1915.62 & 76.8 & 10.25 & 9 & j \cr \+ 1915.62 & 76.8 & 10.25 & 9 & j \cr \+ 1915.62 & 76.8 & 10.25 & 1 & j \cr \+ 1915.77 & 75.6 & 10.59 & 3 & doo \cr \+ 1915.89 & 78.1 & 10.90 & 9 & fox \cr \+ 1915.92 & 75.1 & 10.46 & 9 & o \cr \+ 1915.92 & 75.1 & 10.46 & 9 & o \cr \+ 1915.92 & 75.1 & 10.46 & 6 & o \cr \+ 1915.96 & 76.8 & 10.73 & 5 & vbs \cr \+ 1915.99 & 75.1 & 10.66 & 9 & bar \cr \+ 1915.99 & 75.1 & 10.66 & 7 & bar \cr \+ 1916.11 & 74.6 & 10.57 & 6 & j \cr \+ 1916.19 & 76.5 & 10.78 & 3 & com \cr \+ 1916.21 & 75.5 & 10.81 & 4 & i \cr \+ 1916.79 & 74.4 & 10.63 & 4 & ol \cr \+ 1916.92 & 74.0 & 10.60 & 6 & ol \cr \+ 1916.95 & 73.8 & 10.80 & 9 & bar \cr \+ 1916.95 & 73.8 & 10.80 & 9 & bar \cr \+ 1916.95 & 73.8 & 10.80 & 2 & bar \cr \+ 1917.07 & 75.8 & 11.20 & 4 & fox \cr \+ 1917.11 & 75.5 & 10.87 & 3 & fbn \cr \+ 1917.13 & 74.4 & 11.39 & 2 & btz \cr \+ 1917.18 & 73.7 & 10.90 & 3 & com \cr \+ 1917.18 & 73.4 & 11.24 & 4 & i \cr \+ 1917.19 & 73.2 & 11.06 & 3 & lv \cr \+ 1917.23 & 73.9 & 10.61 & 3 & j \cr \+ 1917.55 & 72.2 & 10.67 & 3 & ol \cr \+ 1917.90 & 72.2 & 11.05 & 5 & vbs \cr \+ 1918.04 & 71.0 & 11.15 & 4 & a \cr \+ 1918.08 & 70.7 & 10.99 & 8 & bar \cr \+ 1918.13 & 70.9 & 10.99 & 2 & stv \cr \+ 1918.15 & 71.6 & 11.14 & 4 & com \cr \+ 1918.16 & 72.8 & 10.59 & 1 & roe \cr \+ 1918.16 & 71.0 & 10.64 & 9 & j \cr \+ 1918.16 & 71.0 & 10.64 & 4 & j \cr \+ 1918.16 & 72.1 & 10.87 & 6 & phl \cr \+ 1918.19 & 71.3 & 10.89 & 3 & ol \cr \+ 1918.23 & 70.3 & 11.43 & 3 & bea \cr \+ 1918.24 & 70.4 & 11.60 & 1 & btz \cr \+ 1918.80 & 68.9 & 10.88 & 2 & phl \cr \+ 1918.98 & 69.0 & 11.14 & 2 & a \cr \+ 1919.10 & 69.4 & 11.05 & 9 & bar \cr \+ 1919.10 & 69.4 & 11.05 & 7 & bar \cr \+ 1919.16 & 69.6 & 11.11 & 7 & lv \cr \+ 1919.23 & 68.7 & 10.66 & 3 & com \cr \+ 1919.47 & 69.7 & 11.16 & 4 & vbs \cr \+ 1920.03 & 67.8 & 11.08 & 2 & a \cr \+ 1920.06 & 69.4 & 11.90 & 4 & btz \cr \+ 1920.10 & 67.1 & 10.61 & 2 & ol \cr \+ 1920.11 & 68.1 & 11.19 & 6 & pav \cr \+ 1920.11 & 68.1 & 11.19 & 1 & fox \cr \+ 1920.15 & 67.0 & 11.23 & 9 & bar \cr \+ 1920.18 & 66.9 & 11.34 & 4 & lv \cr \+ 1920.24 & 69.7 & 11.49 & 5 & fox \cr \+ 1920.74 & 66.8 & 11.28 & 2 & vbs \cr \+ 1920.98 & 65.9 & 11.23 & 3 & a \cr \+ 1921.09 & 66.4 & 11.30 & 6 & lv \cr \+ 1921.12 & 65.3 & 11.22 & 9 & bar \cr \+ 1921.12 & 65.3 & 11.22 & 2 & bar \cr \+ 1921.17 & 65.8 & 11.46 & 5 & btz \cr \+ 1921.19 & 64.6 & 11.11 & 1 & pav \cr \+ 1921.19 & 64.8 & 11.81 & 1 & stg \cr \+ 1921.91 & 64.1 & 11.57 & 4 & vbs \cr \+ 1921.93 & 64.6 & 11.00 & 2 & ol \cr \+ 1921.95 & 63.9 & 11.12 & 3 & a \cr \+ 1922.06 & 63.4 & 11.22 & 3 & phl \cr \+ 1922.08 & 65.9 & 11.52 & 5 & fox \cr \+ 1922.09 & 63.7 & 11.32 & 9 & bar \cr \+ 1922.09 & 63.7 & 11.32 & 9 & bar \cr \+ 1922.21 & 63.2 & 11.00 & 2 & rou \cr \+ 1922.21 & 65.7 & 11.00 & 1 & kpz \cr \+ 1922.24 & 61.0 & 11.22 & 4 & lv \cr \+ 1922.27 & 63.3 & 11.73 & 1 & dic \cr \+ 1922.87 & 61.7 & 10.83 & 1 & ol \cr \+ 1923.05 & 62.4 & 11.21 & 4 & phl \cr \+ 1923.10 & 64.6 & 11.63 & 6 & fox \cr \+ 1923.13 & 62.0 & 11.23 & 3 & a \cr \+ 1923.14 & 61.8 & 11.57 & 5 & gau \cr \+ 1923.15 & 61.6 & 11.38 & 2 & lv \cr \+ 1923.17 & 62.7 & 11.63 & 4 & pou \cr \+ 1923.18 & 61.6 & 11.54 & 3 & vbs \cr \+ 1923.20 & 62.6 & 11.87 & 3 & lng \cr \+ 1923.21 & 62.2 & 11.78 & 4 & dic \cr \+ 1923.23 & 63.3 & 11.78 & 1 & kpz \cr \+ 1923.24 & 61.8 & 11.57 & 3 & stg \cr \+ 1923.88 & 60.8 & 11.46 & 4 & vbs \cr \+ 1924.08 & 59.8 & 11.28 & 1 & j \cr \+ 1924.09 & 59.2 & 11.28 & 2 & a \cr \+ 1924.09 & 61.6 & 11.73 & 4 & fox \cr \+ 1924.10 & 59.3 & 11.17 & 8 & b \cr \+ 1924.17 & 59.7 & 11.50 & 3 & g \cr \+ 1924.20 & 60.1 & 11.50 & 6 & dic \cr \+ 1924.21 & 55.8 & 10.11 & 1 & row \cr \+ 1924.22 & 62.6 & 11.06 & 2 & phl \cr \+ 1924.77 & 58.9 & 11.22 & 3 & ol \cr \+ 1925.06 & 60.6 & 11.38 & 1 & j \cr \+ 1925.06 & 57.8 & 11.56 & 1 & dic \cr \+ 1925.10 & 60.8 & 11.45 & 1 & gcb \cr \+ 1925.10 & 60.1 & 10.85 & 3 & phl \cr \+ 1925.11 & 57.6 & 10.99 & 3 & fat \cr \+ 1925.15 & 58.8 & 11.06 & 3 & a \cr \+ 1925.16 & 57.3 & 11.18 & 9 & lv \cr \+ 1925.16 & 57.3 & 11.18 & 1 & lv \cr \+ 1925.17 & 57.7 & 11.07 & 8 & b \cr \+ 1925.17 & 58.9 & 11.52 & 4 & lng \cr \+ 1925.17 & 58.5 & 11.00 & 4 & pou \cr \+ 1925.19 & 58.9 & 10.98 & 3 & ber \cr \+ 1925.27 & 58.1 & 11.13 & 4 & vou \cr \+ 1925.84 & 56.4 & 10.98 & 6 & vou \cr \+ 1926.03 & 55.8 & 11.10 & 1 & j \cr \+ 1926.09 & 56.6 & 11.25 & 4 & fin \cr \+ 1926.11 & 56.2 & 11.13 & 9 & b \cr \+ 1926.13 & 55.9 & 10.99 & 3 & a \cr \+ 1926.20 & 54.8 & 11.33 & 7 & lv \cr \+ 1926.26 & 54.9 & 10.95 & 3 & vou \cr \+ 1926.76 & 54.2 & 11.09 & 6 & vou \cr \+ 1927.04 0& 57.3 & 11.09 & 2 & bru \cr \+ 1927.16 0& 52.9 & 11.09 & 1 & lv \cr \+ 1927.20 0& 54.4 & 10.58 & 2 & fin \cr \+ 1927.22 0& 55.0 & 10.82 & 2 & a \cr \+ 1927.24 0& 54.2 & 11.08 & 4 & b \cr \+ 1927.91 0& 52.5 & 10.91 & 5 & vou \cr \+ 1928.00 0& 52.1 & 10.63 & 7 & ol \cr \+ 1928.20 0& 51.1 & 10.69 & 1 & fin \cr \+ 1928.20 0& 51.9 & 10.75 & 1 & b \cr \+ 1928.21 0& 51.7 & 10.78 & 1 & b \cr \+ 1928.20 0& 52.3 & 10.63 & 1 & fin \cr \+ 1928.21 0& 52.5 & 10.60 & 2 & a \cr \+ 1928.21 0& 52.0 & 10.84 & 6 & b \cr \+ 1928.22 0& 52.0 & 10.90 & 1 & fin \cr \+ 1928.22 0& 50.9 & 10.72 & 1 & fin \cr \+ 1928.22 0& 51.9 & 10.93 & 1 & b \cr \+ 1928.22 0& 52.2 & 10.78 & 1 & b \cr \+ 1928.22 0& 51.6 & 10.90 & 1 & b \cr \+ 1928.79 0& 51.8 & 10.36 & 6 & bru \cr \+ 1928.79 0& 50.5 & 10.36 & 5 & bru \cr \+ 1928.80 0& 51.2 & 10.54 & 5 & wal \cr \+ 1928.82 0& 49.8 & 10.73 & 1 & b \cr \+ 1928.90 0& 52.6 & 10.87 & 1 & b \cr \+ 1928.94 0& 50.3 & 10.76 & 4 & vou \cr \+ 1929.03 0& 49.6 & 10.46 & 1 & fin \cr \+ 1929.04 0& 49.1 & 11.00 & 1 & fin \cr \+ 1929.04 0& 49.4 & 10.47 & 1 & b \cr \+ 1929.04 0& 49.4 & 10.47 & 1 & fin \cr \+ 1929.04 0& 49.4 & 10.47 & 1 & b \cr \+ 1929.08 0& 48.9 & 10.46 & 1 & fin \cr \+ 1929.09 0& 50.7 & 10.65 & 4 & jsp \cr \+ 1929.15 0& 49.9 & 10.22 & 1 & ol \cr \+ 1929.17 0& 49.8 & 10.61 & 1 & fin \cr \+ 1929.20 0& 49.6 & 10.20 & 1 & fin \cr \+ 1929.20 0& 50.1 & 10.42 & 1 & b \cr \+ 1929.20 0& 50.1 & 10.42 & 2 & a \cr \+ 1929.26 0& 48.7 & 10.69 & 1 & b \cr \+ 1929.30 0& 48.3 & 10.43 & 1 & b \cr \+ 1929.84 0& 48.6 & 10.51 & 3 & vou \cr \+ 1929.85 0& 47.8 & 09.86 & 2 & wal \cr \+ 1929.87 0& 46.2 & 10.82 & 1 & ol \cr \+ 1929.99 0& 48.2 & 10.39 & 4 & b \cr \+ 1930.11 0& 49.6 & 10.06 & 2 & a \cr \+ 1930.13 0& 46.9 & 10.34 & 2 & jsp \cr \+ 1930.18 0& 49.9 & 10.02 & 4 & j \cr \+ 1930.19 0& 47.7 & 09.92 & 2 & stv \cr \+ 1930.28 0& 47.5 & 10.17 & 3 & fin \cr \+ 1930.85 0& 45.2 & 09.61 & 2 & wal \cr \+ 1930.89 0& 46.0 & 10.23 & 2 & vou \cr \+ 1931.07 0& 47.2 & 09.67 & 3 & a \cr \+ 1931.11 0& 46.5 & 10.06 & 1 & ol \cr \+ 1931.11 0& 43.9 & 10.09 & 1 & fen \cr \+ 1931.15 0& 45.6 & 09.96 & 4 & b \cr \+ 1931.15 0& 45.6 & 09.80 & 2 & fin \cr \+ 1931.18 0& 48.6 & 09.82 & 2 & ma \cr \+ 1932.01 0& 43.5 & 09.44 & 8 & wam \cr \+ 1932.15 0& 43.4 & 09.26 & 3 & a \cr \+ 1932.23 0& 42.7 & 09.48 & 4 & b \cr \+ 1932.26 0& 41.8 & 09.64 & 1 & stg \cr \+ 1932.28 0& 42.6 & 09.52 & 3 & fin \cr \+ 1932.75 0& 41.8 & 09.16 & 4 & vou \cr \+ 1932.83 0& 40.6 & 09.04 & 9 & wal \cr \+ 1932.87 0& 40.8 & 09.14 & 8 & vys \cr \+ 1933.14 0& 39.9 & 09.20 & 4 & fin \cr \+ 1933.16 0& 40.4 & 09.14 & 4 & b \cr \+ 1933.19 0& 40.2 & 08.98 & 3 & a \cr \+ 1933.22 0& 40.9 & 09.22 & 2 & baz \cr \+ 1933.24 0& 42.0 & 08.82 & 1 & ol \cr \+ 1933.79 0& 37.5 & 08.88 & 1 & vou \cr \+ 1933.81 0& 38.8 & 09.08 & 1 & kui \cr \+ 1933.81 0& 39.0 & 08.71 & 9 & wal \cr \+ 1934.14 0& 38.7 & 08.48 & 3 & a \cr \+ 1934.15 0& 37.0 & 08.44 & 4 & baz \cr \+ 1934.15 0& 37.0 & 08.47 & 4 & baz \cr \+ 1934.22 0& 32.1 & 08.38 & 3 & ol \cr \+ 1934.27 0& 36.6 & 08.69 & 4 & b \cr \+ 1935.14 0& 33.8 & 08.09 & 2 & fin \cr \+ 1935.16 0& 34.0 & 08.06 & 2 & a \cr \+ 1935.17 0& 33.3 & 07.97 & 4 & baz \cr \+ 1935.24 0& 35.4 & 07.66 & 2 & ol \cr \+ 1935.28 0& 33.7 & 08.03 & 3 & b \cr \+ 1935.80 0& 35.2 & 08.30 & 1 & vou \cr \+ 1936.12 0& 30.7 & 07.55 & 4 & b \cr \+ 1936.19 0& 29.2 & 07.47 & 5 & baz \cr \+ 1936.19 0& 30.4 & 07.50 & 1 & gcb \cr \+ 1936.22 0& 29.3 & 07.49 & 3 & smw \cr \+ 1936.85 0& 27.2 & 06.86 & 4 & smw \cr \+ 1937.09 0& 26.3 & 07.01 & 6 & b \cr \+ 1937.18 0& 26.8 & 06.68 & 2 & fin \cr \+ 1937.22 0& 24.6 & 06.67 & 4 & baz \cr \+ 1937.88 0& 21.4 & 05.96 & 4 & vou \cr \+ 1937.88 0& 21.1 & 06.10 & 3 & smw \cr \+ 1937.89 0& 20.1 & 06.66 & 4 & smw \cr \+ 1938.10 0& 19.4 & 06.17 & 4 & b \cr \+ 1938.17 0& 18.5 & 05.86 & 2 & fin \cr \+ 1938.19 0& 18.9 & 05.94 & 8 & baz \cr \+ 1938.85 0& 15.9 & 05.32 & 6 & vou \cr \+ 1938.99 0& 13.7 & 05.28 & 2 & b \cr \+ 1939.27 0& 16.0 & 04.29 & 1 & jef \cr \+ 1940.04 0& 04.9 & 04.02 & 2 & b \cr \+ 1947.21 1& 94.5 & 03.40 & 1 & hir \cr \+ 1947.22 1& 90.0 & 04.01 & 3 & b \cr \+ 1948.18 1& 69.4 & 04.69 & 3 & b \cr \+ 1949.84 1& 69.4 & 04.69 & 1 & jef \cr \+ 1950.12 1& 69.4 & 04.69 & 1 & jef \cr \+ 1951.07 1& 43.9 & 04.64 & 1 & b \cr \+ 1955.15 1& 10.5 & 06.97 & 1 & b \cr \+ 1955.78 1& 11.0 & 07.68 & 3 & vbs \cr \+ 1955.78 1& 11.0 & 07.68 & 3 & vbs \cr \+ 1956.19 1& 02.2 & 07.43 & 1 & b \cr \+ 1956.21 1& 09.4 & 07.35 & 4 & rab \cr \+ 1956.23 1& 01.8 & 07.18 & 4 & baz \cr \+ 1956.25 1& 02.8 & 05.69 & 5 & dic \cr \+ 1957.16 1& 02.8 & 05.69 & 2 & ARC \cr \+ 1957.20 0& 99.8 & 07.26 & 1 & cou \cr \+ 1957.74 0& 97.2 & 07.73 & 1 & b \cr \+ 1958.09 0& 99.5 & 07.39 & 1 & b \cr \+ 1959.17 0& 92.4 & 08.55 & 9 & b \cr \+ 1959.25 0& 92.1 & 08.55 & 1 & hei \cr \+ 1959.96 0& 91.0 & 08.86 & 3 & wor \cr \+ 1960.10 0& 89.6 & 08.99 & 9 & b \cr \+ 1960.24 0& 87.6 & 08.66 & 3 & pau \cr \+ 1961.14 0& 87.9 & 09.21 & 2 & cou \cr \+ 1961.16 0& 87.7 & 09.05 & 5 & hei \cr \+ 1961.81 0& 89.2 & 09.43 & 1 & hln \cr \+ 1961.85 0& 88.2 & 09.32 & 2 & cou \cr \+ 1961.88 0& 85.0 & 09.50 & 8 & b \cr \+ 1962.13 0& 84.7 & 09.66 & 4 & hln \cr \+ 1962.91 0& 84.5 & 09.72 & 8 & b \cr \+ 1962.98 0& 82.6 & 09.83 & 1 & b \cr \+ 1963.13 0& 81.5 & 09.78 & 2 & knp \cr \+ 1963.98 0& 78.1 & 09.89 & 4 & hln \cr \+ 1964.04 0& 81.2 & 10.14 & 2 & cou \cr \+ 1964.17 0& 80.0 & 10.45 & 5 & b \cr \+ 1964.25 0& 77.3 & 09.80 & 4 & hln \cr \+ 1964.74 0& 77.4 & 10.26 & 3 & knp \cr \+ 1964.74 & 80.9 & 10.41 & 1 & vbs \cr \+ 1965.03 & 78.2 & 10.27 & 1 & wor \cr \+ 1965.09 0& 75.9 & 10.28 & 4 & hln \cr \+ 1965.17 0& 76.9 & 10.58 & 7 & b \cr \+ 1966.17 & 75.9 & 10.27 & 3 & wak \cr \+ 1966.18 0& 74.7 & 10.61 & 2 & knp \cr \+ 1966.18 0& 75.1 & 10.72 & 7 & nbg \cr \+ 1966.18 & 75.7 & 10.48 & 3 & wak \cr \+ 1966.19 & 74.4 & 10.80 & 9 & b \cr \+ 1965.19 & 77.0 & 10.39 & 4 & ldb \cr \+ 1965.92 & 75.5 & 10.55 & 4 & ldb \cr \+ 1966.20 & 74.2 & 10.88 & 3 & hln \cr \+ 1966.95 & 74.7 & 10.72 & 2 & wak \cr \+ 1966.99 & 73.4 & 10.77 & 4 & ldb \cr \+ 1967.07 & 73.6 & 10.91 & 3 & hln \cr \+ 1967.14 & 73.2 & 10.90 & 2 & knp \cr \+ 1967.17 & 73.6 & 10.87 & 4 & nbg \cr \+ 1967.86 & 71.6 & 10.93 & 8 & ldb \cr \+ 1968.04 & 71.3 & 10.96 & 5 & ldb \cr \+ 1968.11 & 70.4 & 11.05 & 4 & hln \cr \+ 1968.13 & 71.8 & 10.83 & 3 & wak \cr \+ 1968.17 & 71.1 & 10.97 & 4 & ldb \cr \+ 1969.06 & 68.8 & 11.14 & 3 & hln \cr \+ 1969.06 & 69.7 & 11.08 & 3 & wak \cr \+ 1969.08 & 69.4 & 11.10 & 4 & ldb \cr \+ 1969.15 & 69.2 & 11.12 & 3 & ldb \cr \+ 1969.17 & 70.1 & 11.15 & 2 & nbg \cr \+ 1970.08 & 67.5 & 11.21 & 6 & ldb \cr \+ 1970.17 & 67.7 & 11.24 & 9 & nbg \cr \+ 1970.37 & 66.9 & 11.26 & 2 & hln \cr \+ 1970.95 & 65.9 & 11.28 & 7 & ldb \cr \+ 1971.20 & 65.2 & 11.21 & 4 & hln \cr \+ 1971.68 & 65.7 & 11.07 & 7 & wak \cr \+ 1972.02 & 63.9 & 11.33 & 6 & ldb \cr \+ 1974.26 & 59.8 & 11.21 & 4 & hln \cr \+ 1975.13 & 58.9 & 11.19 & 4 & hln \cr \+ 1975.20 & 61.3 & 10.91 & 2 & pop \cr \+ 1975.21 & 59.1 & 11.10 & 1 & ole \cr \+ 1976.20 & 56.1 & 10.96 & 3 & hln \cr \+ 1976.21 & 55.8 & 10.86 & 3 & hln \cr \+ 1977.83 & 51.5 & 10.65 & 1 & hln \cr \+ 1978.95 & 50.7 & 10.69 & 3 & hln \cr \+ 1979.13 & 51.3 & 10.53 & 2 & hln \cr \line{} \hrule \line{} \noindent Code for names: \ala a=Aitken; arc=Archer; auw=Auwers; b=van den Bos; bar=Barnard; bar=Barton; baz=Baize; bdg=Bond; bea=Beal; ber=Berman; big=Bigourdan; boo=Booth\-royd; brg=B\"orgen; brh=Bruhns; brn=Br\"unnow; brs=Brown; bru=Bruggencate; btn=Burton; btz=Bernewitz; bu=Burnham; chc=Chacornac; com=Comstock; cou=Couteau; da=Dawes; dic=Dick; doo=Doolittle; du=Dun\'er; eas=Eastman; en=Engelmann; fat=Fatou; fbn=Brown; fen=Fender; fin=Finsen; foe=Foester; fox=Fox; frs=Frisby; fus=Fuss; g=gcb=Giacobini; gau=Gauchet; gld=Gledhill; gro=Greenwitch Observatory; hei=Heintz; hir=Hirst; hl=Hall; hld=Holden; hln=\ala Holden; ho=Hough; hu=Hussey; hwe=Howe; i=Innes; j=Jonckheere; jef=Jeffers; jsp=Jessup; jw=Wilson \& Seabroke; knp=Kniper; knt=Knott; kpz=Krumpholz; l=Lewis; ldb=Landbauer (?); lng=Lau Ling Fang; loh=Lohse; lsl=Lassel; lv=Lea\-venworth; ma=Mason; mnl=McNeill; mth=Marth; nbg=Newburg; neb=Neff \& Burnham (?); nes=Newcomb; o=Olsen; ol=Olivier; ole=Olevic; pau=Pauscher; pav=Pavel; pec=Pech\"ule; pei=Peirce; pet=Peters; phl=Phillips; pop=Popovic; pou=Pourteau; prt=Pritchett; r=Russell; rab=Rabe; roe=Roe; rou=Rougier; row=Rowg (doubtful observation); rut=Rutherford; se=Secchi; sea=Searle; she=\ala Sheberle; ski=Skinner; sm=Smith; smw=Simonow; stg=G.Struve; stn=Stone; stt=Otto Struve; stv=Stevenson; stv=Hermann Struve; ttj=Tietjen; tut=Tuttle; upt=Upton; vbs=van Biesbroeck; vog=Vogel; vou=Vo\^ute; vys=Vyssotsky; wak=\ala Walker; wal=Wallenquist; wam=Wamer; wat=Watson; win=Winlock; wnc=Win\-necke; wno=Washington Naval Observatory; wor=Worley; wz=Wirtz; yng=\break Young. \vfil \eject % page 25: table 2 \noindent {\bf Table 2:} Mean square Fourier analysis; Fourier transforms $A_x$ of O-C$_{\rm X}$ and $A_y$ of O-C$_{\rm Y}$, and their mean $A_{xy}$; the maximum of $A_{xy}$ is underlined (see Fig. 3) \settabs 4\columns \line{} \hrule \line{} \+ period & $A_x$ & $A_y$ & $A_{xy}$ \cr \line{} \hrule \line{} \+ 12.50 years : & 0.01228 & 0.05073 & 0.02496 \cr \+ 10.00 years : & 0.02951 & 0.04133 & 0.03492 \cr \+ 8.33 years : & 0.03516 & 0.04090 & 0.03792 \cr \+ 7.14 years : & 0.02345 & 0.06116 & 0.03787 \cr \+ 6.25 years : & 0.04329 & 0.06830 & \underbar{0.05437} \cr \+ 5.56 years : & 0.02729 & 0.02813 & 0.02771 \cr \+ 5.00 years : & 0.01265 & 0.02443 & 0.01758 \cr \+ 4.55 years : & 0.02082 & 0.01089 & 0.01506 \cr \+ 4.17 years : & 0.01877 & 0.02997 & 0.02372 \cr \+ 3.85 years : & 0.00813 & 0.05677 & 0.02148 \cr \+ 3.57 years : & 0.01231 & 0.05361 & 0.02568 \cr \+ 3.33 years : & 0.01665 & 0.03201 & 0.02309 \cr \+ 3.13 years : & 0.01685 & 0.04038 & 0.02608 \cr \+ 2.94 years : & 0.01807 & 0.02129 & 0.01962 \cr \+ 2.78 years : & 0.02202 & 0.02106 & 0.02153 \cr \+ 2.63 years : & 0.02448 & 0.00623 & 0.01235 \cr \+ 2.50 years : & 0.02630 & 0.03138 & 0.02873 \cr \+ 2.38 years : & 0.01352 & 0.03122 & 0.02055 \cr \+ 2.27 years : & 0.01686 & 0.04935 & 0.02885 \cr \+ 2.17 years : & 0.03817 & 0.02410 & 0.03033 \cr \+ 2.08 years : & 0.00698 & 0.01334 & 0.00965 \cr \+ 2.00 years : & 0.02593 & 0.02383 & 0.02486 \cr \vskip 5.truemm %\line{} \hrule \vfil \eject % page 26: table 3 \noindent {\bf Table 3:} Mean square sine function analysis (all data); perturbation amplitudes ${\cal A}_X$ of O-C$_{\rm X}$ and ${\cal A}_Y$ of O-C$_{\rm Y}$, and their mean ${\cal A}_{XY}$; the maximum of ${\cal A}_{XY}$ is underlined (see Fig. 4) \settabs 4\columns \line{} \hrule \line{} \+ period & ${\cal A}_X$ & ${\cal A}_Y$ & ${\cal A}_{XY}$ \cr \line{} \hrule \line{} \+ 7.79 years : & 0.01914 & 0.00567 & 0.01042 \cr \+ 7.75 years : & 0.02471 & 0.00295 & 0.00854 \cr \+ 7.72 years : & 0.02992 & 0.00204 & 0.00782 \cr \+ 7.68 years : & 0.03464 & 0.00378 & 0.01144 \cr \+ 7.65 years : & 0.03880 & 0.00593 & 0.01517 \cr \+ 7.62 years : & 0.04233 & 0.00804 & 0.01845 \cr \+ 7.58 years : & 0.04520 & 0.01012 & 0.02139 \cr \+ 7.55 years : & 0.04737 & 0.01228 & 0.02412 \cr \+ 7.52 years : & 0.04877 & 0.01465 & 0.02673 \cr \+ 7.48 years : & 0.04932 & 0.01734 & 0.02925 \cr \+ 7.45 years : & 0.04890 & 0.02041 & 0.03159 \cr \+ 7.41 years : & 0.04741 & 0.02385 & 0.03363 \cr \+ 7.38 years : & 0.04476 & 0.02760 & 0.03515 \cr \+ 7.35 years : & 0.04093 & 0.03154 & 0.03593 \cr \+ 7.32 years : & 0.03599 & 0.03550 & 0.03574 \cr \+ 7.28 years : & 0.03006 & 0.03933 & 0.03438 \cr \+ 7.25 years : & 0.02333 & 0.04289 & 0.03163 \cr \+ 7.22 years : & 0.01603 & 0.04605 & 0.02717 \cr \+ 7.19 years : & 0.00839 & 0.04872 & 0.02022 \cr \+ 7.15 years : & 0.00067 & 0.05084 & 0.00583 \cr \+ 7.12 years : & 0.00706 & 0.05239 & 0.01924 \cr \+ 7.09 years : & 0.01449 & 0.05332 & 0.02780 \cr \+ 7.06 years : & 0.02148 & 0.05363 & 0.03394 \cr \+ 7.03 years : & 0.02787 & 0.05327 & 0.03853 \cr \+ 7.00 years : & 0.03347 & 0.05224 & 0.04181 \cr \+ 6.96 years : & 0.03811 & 0.05052 & 0.04388 \cr \+ 6.93 years : & 0.04164 & 0.04814 & 0.04477 \cr \+ 6.90 years : & 0.04394 & 0.04518 & 0.04456 \cr \+ 6.87 years : & 0.04494 & 0.04177 & 0.04332 \cr \+ 6.84 years : & 0.04461 & 0.03808 & 0.04122 \cr \+ 6.81 years : & 0.04301 & 0.03434 & 0.03843 \cr \+ 6.78 years : & 0.04025 & 0.03074 & 0.03517 \cr \+ 6.75 years : & 0.03649 & 0.02747 & 0.03166 \cr \+ 6.72 years : & 0.03202 & 0.02468 & 0.02811 \cr \+ 6.69 years : & 0.02734 & 0.02249 & 0.02480 \cr \+ 6.66 years : & 0.02337 & 0.02098 & 0.02214 \cr \+ 6.63 years : & 0.02151 & 0.02019 & 0.02084 \cr \+ 6.60 years : & 0.02288 & 0.02014 & 0.02147 \cr \+ 6.57 years : & 0.02710 & 0.02089 & 0.02380 \cr \+ 6.54 years : & 0.03280 & 0.02250 & 0.02717 \cr \+ 6.51 years : & 0.03881 & 0.02502 & 0.03116 \cr \+ 6.48 years : & 0.04431 & 0.02849 & 0.03553 \cr \+ 6.45 years : & 0.04878 & 0.03289 & 0.04005 \cr \+ 6.43 years : & 0.05190 & 0.03811 & 0.04447 \cr \+ 6.40 years : & 0.05352 & 0.04398 & 0.04852 \cr \+ 6.37 years : & 0.05362 & 0.05029 & 0.05193 \cr \+ 6.34 years : & 0.05229 & 0.05674 & 0.05447 \cr \+ 6.31 years : & 0.04961 & 0.06296 & \underbar{0.05589} \cr \+ 6.28 years : & 0.04572 & 0.06853 & \underbar{0.05597} \cr \+ 6.26 years : & 0.04075 & 0.07303 & 0.05455 \cr \+ 6.23 years : & 0.03485 & 0.07617 & 0.05152 \cr \+ 6.20 years : & 0.02819 & 0.07776 & 0.04682 \cr \+ 6.17 years : & 0.02092 & 0.07784 & 0.04035 \cr \+ 6.15 years : & 0.01322 & 0.07659 & 0.03182 \cr \+ 6.12 years : & 0.00536 & 0.07425 & 0.01994 \cr \+ 6.09 years : & 0.00314 & 0.07110 & 0.01495 \cr \+ 6.06 years : & 0.01063 & 0.06741 & 0.02677 \cr \+ 6.04 years : & 0.01773 & 0.06336 & 0.03352 \cr \+ 6.01 years : & 0.02398 & 0.05907 & 0.03764 \cr \+ 5.98 years : & 0.02913 & 0.05457 & 0.03987 \cr \+ 5.96 years : & 0.03307 & 0.04983 & 0.04059 \cr \+ 5.93 years : & 0.03576 & 0.04482 & 0.04003 \cr \+ 5.90 years : & 0.03722 & 0.03956 & 0.03837 \cr \+ 5.88 years : & 0.03752 & 0.03413 & 0.03579 \cr \+ 5.85 years : & 0.03671 & 0.02871 & 0.03247 \cr \+ 5.82 years : & 0.03485 & 0.02350 & 0.02862 \cr \+ 5.80 years : & 0.03199 & 0.01867 & 0.02444 \cr \+ 5.77 years : & 0.02816 & 0.01434 & 0.02010 \cr \+ 5.75 years : & 0.02347 & 0.01055 & 0.01573 \cr \+ 5.72 years : & 0.01805 & 0.00727 & 0.01146 \cr \+ 5.70 years : & 0.01215 & 0.00456 & 0.00744 \cr \+ 5.67 years : & 0.00639 & 0.00285 & 0.00427 \cr \+ 5.64 years : & 0.00440 & 0.00327 & 0.00379 \cr \+ 5.62 years : & 0.00927 & 0.00516 & 0.00692 \cr \+ 5.59 years : & 0.01522 & 0.00754 & 0.01071 \cr \+ 5.57 years : & 0.02093 & 0.01022 & 0.01462 \cr \+ 5.54 years : & 0.02605 & 0.01315 & 0.01851 \cr \+ 5.52 years : & 0.03035 & 0.01623 & 0.02219 \cr \+ 5.50 years : & 0.03364 & 0.01928 & 0.02547 \cr \+ 5.47 years : & 0.03577 & 0.02212 & 0.02813 \cr \+ 5.45 years : & 0.03661 & 0.02458 & 0.03000 \cr \+ 5.42 years : & 0.03613 & 0.02649 & 0.03094 \cr \+ 5.40 years : & 0.03439 & 0.02770 & 0.03086 \cr \+ 5.37 years : & 0.03153 & 0.02805 & 0.02974 \cr \+ 5.35 years : & 0.02775 & 0.02742 & 0.02758 \cr \+ 5.33 years : & 0.02324 & 0.02572 & 0.02445 \cr \+ 5.30 years : & 0.01819 & 0.02298 & 0.02045 \cr \+ 5.28 years : & 0.01274 & 0.01943 & 0.01574 \cr \+ 5.25 years : & 0.00706 & 0.01559 & 0.01049 \cr \+ 5.23 years : & 0.00138 & 0.01249 & 0.00415 \cr \+ 5.21 years : & 0.00414 & 0.01174 & 0.00697 \cr \line{} \hrule \vfil \eject \bye