span class="n">per</span> <span class="o">=</span> <span class="mf">1.</span>                             <span class="c1">#orbital period </span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">params</span><span class="o">.</span><span class="n">rp</span> <span class="o">=</span> <span class="mf">0.1</span>                             <span class="c1">#planet radius (in units of stellar radii)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">params</span><span class="o">.</span><span class