\index{Solar}{Jupiter@Jupiter}

\begin{description}
    \item \textbf{19th. January, 2011} $\pisces$ (\opposition \ + 120 days)

        m$\mathsf{_v}$ = -2$\cdot$23, \angle = 31$\cdot$58\textdegree{}, $\Delta$ = 5$\cdot$36 AU \cite{JPL} \\
        \diameter: Equatorial = 36$\cdot$75$''$; Polar = 34$\cdot$37$''$ \cite{JPL} \\
        $\omega$1 = 163$\cdot$6\textdegree{}, $\omega$2 = 302$\cdot$8\textdegree{}, $\omega$3 = 181$\cdot$3\textdegree{} \cite{BAA} \\
        Illuminated fraction = 99$\cdot$25\% \cite{JPL}, Tilt = +2$\cdot$0\textdegree{} \cite{BAA}

        18:00 GMT, astronomical twilight. \\
        $\rightmoon$ 99$\cdot$9\%, 118.6\textdegree{} following \cite{JPL} \\
        Lm$\mathsf{_v}$ $\simeq$ 3$\cdot$0 (faintest star at zenith) \\
        Seeing $\approx$ AII/III, Transparency $\approx$ 2/5 \\
        Conditions: 0\textdegree{} C, mist forming.

        Orion Optics (UK) HiLux 200mm f/6 Newtonian, 1/10 PV wavefront. \\
        Baader Hyperion 5mm eyepiece (240x).

        \begin{itemize}
            \item \emph{North equatorial belt} strongly orange.
            \item \emph{South equatorial belt} fainter and thinner, showing revival.
            \item \emph{Polar regions} similar to south equatorial belt but slightly browner.
            \item Satellites observed:
            \begin{itemize}
                \item \emph{Europa:} (m$\mathsf{_v}$ = 5$\cdot$79 \cite{JPL});
                \item \emph{Ganymede:} (m$\mathsf{_v}$ = 5$\cdot$23 \cite{JPL});
                \item \emph{Callisto:} (m$\mathsf{_v}$ = 6$\cdot$46 \cite{JPL});
                \item \emph{Shadow transit of Io} ($\lambda$2 $\simeq$ 325\textdegree{}) discernable during moments of best seeing: actual transit not discernable.
            \end{itemize}
        \end{itemize}

\end{description}