%\input accent 
%\font\ei=cmr8
%\font\tm=times at 10 pt
%\font\eit=cmti8
%\font\eightbf=cmbx8
%\def\sc{\scriptstyle}
%\def\re{\hskip 4mm} 
%\def\cc#1{\hfill#1\hfill}
%\newdimen\digitwidth     % d{finition du caract}re * comme
%\setbox100=\hbox{\sevenrm0}     % une boite vide de longueur {gale
%\digitwidth=\wd100         % @ la taille d'un chiffre
%\catcode`\*=\active      % @ utiliser dans les tableaux
%\def*{\kern\digitwidth}
%\def\m{{$-$}}
%\def\p{\phantom{$-$}}
%\parindent4mm
%\def\x{$\times$}
%\def\dis{\displaystyle}

%-------- Macro ------



\noindent {\bf  Table 2.18.} 
Demi-diam\`etre ; masse ; masse
volumique, $\rho$ ; magnitude visuelle
\`a l'opposition, $m_v$ ;\hfill\break
\phantom{\bf Table 2.18.} alb\'edo
g\'eom\'etrique.  \medskip 
{\ninepoint {\tabskip=0mm plus 2mm  \halign to
150mm {#\hfill&#\hfill&\cc{#}&\cc{#}& 
\cc{#}&  #\hfil&\hfil  #\hfil\cr 
\noalign{\hrule} \noalign {\medskip}
 Nom&\cc {N$^{\circ}$} & a$ _1$ a$ _2$ a$ _3 $ ou a$ _s$ &
Masse& $\rho$ &$m_v$& Alb\'edo\cr 
&&\cc{(km)}& (10$^{21}$ kg)&(10$ ^3$
kg/m$^3$)&&g\'eom\'etrique\cr \noalign
{\medskip} 
\noalign{\hrule}
\noalign {\bigskip}
&&&{\bf Terre}&&&\cr
\noalign {\smallskip}                 
 Lune&&1 737.4&73.476&3.34&\llap{$-$}12.7&0.12\cr
\noalign{\bigskip}
&&&{\bf Mars}&&&\cr
\noalign {\smallskip}                  
Phobos&&13.3 -  11.1 -   9.3&1.27\x10$ ^{-5}$ &2.2&11.6&0.06\cr
D\'eimos&&7.5 - 6.2 - 5.4&1.8\x10$ ^{-6}$&1.7&           
12.7&0.06\cr
\noalign{\bigskip}                       
&&&{\bf Jupiter}&&&\cr
\noalign {\smallskip}
M\'etis&XVI&20&9.5\x10$ ^{-5}$&2.8&17.5&0.05\cr
Adrast\'eia&XV&13 - 10 - 8&1.9\x10$ ^{-5}$&4.5&18.9&0.05\cr
Amalth\'ee&V&131.0 - 73.0 - 67.0&7.2\x10$ ^{-3}$&2.7&14.1&0.05\cr
Th\'eb\'e&XIV&55  -      -  45&7.6\x10$ ^{-4}$&1.45&15.7& 0.04\cr
Io&I&1830.0 - 1818.7 -1815.3& 89.3&3.53&5.02& 0.61\cr
Europe&II&1 565 &48.0&2.99&5.29&0.64\cr
Ganym\`ede&III&2 634&148.2\f0&1.94&4.61& 0.42\cr
Callisto&IV&2 403&107.6\f0&1.85&5.65& 0.20\cr
L\'eda& XIII&5&5.7\x10$^{-6}$&11&20&\cr
Himalia&VI&85&9.5\x10$ ^{-3}$&3.7&14.8&0.03\cr
Lysith\'ea&X&12&7.6\x10$ ^{-5}$&11&18.4&\cr
Elara&VII& 40&7.6\x10$ ^{-4}$&2.8&16.8&0.03\cr
Anank\'e&XII&10& 3.8\x10$ ^{-5}$&9.1&18.9&\cr
Carm\'e&XI&15& 9.5\x10$ ^{-5}$&6.7&18.0&\cr
Pasipha\'e&VIII&18&1.9\x10$ ^{-4}$&7.8&17.0 &\cr
Sinop\'e&IX&14&7.6\x10$ ^{-5}$&6.6&18.3&\cr
\noalign{\bigskip}                       
&&&{\bf Saturne}&&&\cr
\noalign {\smallskip}
Anneau C&&&9.7\x10$ ^{-4}$&&&\cr
Anneau B&&&2.4\x10$ ^{-2}$&&&\cr           
Anneau A&&&6.3\x10$ ^{-3}$&&&\cr
Pan&XVIII&$\sim10$&&&&0.4-0.7\cr
Atlas&XV&18.5 - 17.2 - 13.5&&&18&0.4\cr
Prom\'eth\'ee&XVI&74.0 - 50.0 - 34.0&&&15&0.6\cr
Pandore&XVII&55.0 - 44.0 - 31.0&&&15.5&0.6\cr
\'Epim\'eth\'ee&XI&69.0 - 55.0 -  55.0&&&15&0.4\cr
Janus&X&97.0 - 95.0 - 77.0&&&14& 0.4\cr
Mimas&I&209.1 - 196.2 - 191.4&0.0455&1.4 &12.9&0.77\cr
Encelade&II&256.3 - 247.3 - 244.6&0.074&1.1 &11.7&1.04\cr
T\'ethys&III& 535.6 - 528.2 - 525.8&0.674& 1.1 &10.3&0.8\cr
T\'elesto (T\'ethys B)&XIII&15 - 12.5 -  7.5&&&18& 0.6\cr
\noalign{\medskip}
\noalign {\hrule}
}}


\vfill\eject
\tenpoint
\noindent {\bf  Table 2.18.} (fin). 
\bigskip 
{\ninepoint {\tabskip=0mm plus 2mm 
\halign to 150mm
{#\hfill&#\hfill&\cc{#}&\cc{#}& 
\cc{#}&  #\hfil&\hfil  #\hfil\cr 
\noalign{\hrule} \noalign {\medskip}
 Nom&\cc {N$^{\circ}$} & a$ _1$ a$ _2$ a$ _3 $ ou a$ _s$ &
Masse&  $\rho$ &$m_v$& Alb\'edo\cr 
&&\cc{(km)}&(10$ ^{21}$ kg)&(10$ ^3$
kg/m$^3$)&&g\'eom\'etrique\cr \noalign
{\medskip} 
\noalign{\hrule}
\noalign {\medskip}                      
&&&{\bf Saturne}&&&\cr
\noalign {\smallskip}
Calypso (T\'ethys C)&XIV&15.0 - 8.0 - 8.0&&&18.5&0.8\cr
Dion\'e&IV& 560&1.052&1.4&10.4 & 0.55\cr
H\'el\`ene&XII&16&&&17&0.5\cr
Rh\'ea &V&764&2.31&1.2&9.7 & 0.65\cr
Titan&VI& 2 575&134.55&1.9& 8.3&0.21\cr
Hyp\'erion&VII&180 - 140 - 112.5&0.017&1.4&14.19&0.19/0.25\cr
Japet&VIII&718&1.59 &1.3 &10.2/11.9&0.5 $(^1)$\cr
Ph\oe b\'e &IX&115  - 110  - 105&0.0004&0.07&16.5& 0.06\cr
\noalign {\medskip}
&&&{\bf Uranus}&&&\cr
\noalign {\smallskip}
Cord\'elia&VI&13&1.4\x10$^{-5}$&1.5&24.2 $(^2)$&\cr
Oph\'elie&VII&15&2.5\x10$^{-5}$&1.5&23.9 $(^2)$&\cr
Bianca&VIII&21&&&23.1 $(^2)$&\cr
Cressida&IX&31&&&22.3 $(^2)$&\cr
Desd\'emone&X&27&&&22.5 $(^2)$&\cr
Juliette&XI&42&&&21.7 $(^2)$&\cr
Portia&XII&54&&&21.1 $(^2)$&\cr
Rosalinde&XIII&27&&&22.5&\cr
Belinda&XIV&33&&&22.1&\cr
Puck&XV&77&&&20.4&0.07\cr
Miranda&V&240.4 - 234.2 - 232.9&0.066&1.2& 16.5&0.34\cr
Ariel&I&581.1 - 577.9 - 577.7&1.35&1.7&14.4&0.40\cr
Umbriel&II&584.7&1.17&1.4&15.3& 0.19\cr
Titania &III&788.9&3.526&1.7& 13.9&0.28\cr
Ob\'eron&IV&761.4&3.014&1.6&14.2&0.24\cr
\noalign{\medskip}                       
&&&{\bf Neptune}&&&\cr
\noalign {\smallskip}
Na\"\i ade&III&29&0.99\x10$ ^{-4}$&1.0&24.7&\cr
Thalassa&IV&40&3.2\x10$ ^{-4}$&1.2&23.8&\cr
Despina&V&74&2.1\x10$ ^{-3}$&1.2&22.6&0.06\cr
Galat\'ee&VI&79&3.7\x10$ ^{-3}$&1.8&22.3&0.06\cr
Larissa&VII&104 - - 89&4.3\x10$ ^{-3}$&1.2&22.0&0.06\cr
Prot\'ee&VIII& 218 - 208 - 201&4.0\x10$ ^{-2}$&1.1&20.3&0.06\cr
Triton&I&1 352.6&21.4&2.1&13.7&0.7\cr
N\'er\'eide&II&170&0.02&1.0&18.7&0.4\cr
\noalign{\medskip}
&&&{\bf Pluton}&&&\cr
\noalign {\smallskip}
Charon&I&593&1.94&2&16.8& 0.4\cr
\noalign{\medskip}
\noalign {\hrule}
\noalign{\smallskip}}}
\noindent
$(^1)$ C\^ot\'e brillant 0.5 ; c\^ot\'e non brillant 0.07.\ligne
$(^2)$ Calcul\'ee en supposant que le satellite a le m\^eme alb\'edo que Puck.
{\medskip}
{\hrule}
\tenrm
\vfill\eject