\documentclass[svgnames,a4paper]{standalone}
\usepackage[T1]{fontenc}
\usepackage[frenchb]{babel}
\usepackage{bera}
\usepackage{xcolor}
\usepackage{pst-caelum}
\usepackage{xint-meeus}

\begin{document}
\begin{pspicture}(-7,-7)(7,7)
\psset[caelum]{
  sideralrotation,
  hemisphere=south,
  lat=-18.9122,
  lon=-47.5212,          % Ciel de Tananarive le 13 mai à 23h
  month=5,               % l'horizon bordé est à 20° de hauteur
  day=13,
  hour=23,
  altitude=20}
\caelum{Sky}
\caelum[color1={[rgb]{0.25 0.25 0.55}},color2={[rgb]{0.3,0.3,0.6}},mwsize=1]{MilkyWay}
\caelum[linecolor=MidnightBlue!90!LightBlue,linewidth=0.5pt]{Graticule}%
\caelum[linestyle=dotted,linewidth=0.2pt,linecolor=LightSkyBlue]{Boundaries}
\caelum[linewidth=0.2pt,fillcolor=Goldenrod,size=1.4]{Asterisms}
\caelum[linecolor=Black]{Graduations}
\caelum[linewidth=0.3pt,linecolor=Yellow]{EGalactic}
\caelum[linecolor=Crimson,linewidth=0.25pt]{Ecliptic}
\caelum[linecolor=Goldenrod,fillcolor=Black,opacity=0.6,linewidth=1pt]{Horizon}
\end{pspicture}
\end{document}