<div dir="ltr">Hi all,<br>I am trying astropy.time to do conversion between JD and UT.<br>It is easier to convert UT to JD.  It seems JD equals jd1+jd2, right?  I do not know why there are two parts since one value is enough.<br>
However It is difficult to convert JD to UT? It seems there is no relative manipulation in this package.<br><pre><span class="">>>> </span><span class="">from</span> <span class="">astropy.time</span> <span class="">import</span> <span class="">Time<br>
</span><span class="">>>> </span><span class="">t</span> <span class="">=</span> <span class="">Time</span><span class="">(</span><span class="">'2010-01-01 00:00:00'</span><span class="">,</span> <span class="">scale</span><span class="">=</span><span class="">'utc'</span><span class="">)</span>
<span class="">>>> </span><span class="">t</span><span class="">.</span><span class="">jd1</span><span class="">,</span> <span class="">t</span><span class="">.</span><span class="">jd2</span>
<span class="">(2455197.5, 0.0)<br><br>best<br>Thank you.<br>hang<br></span><br><br><br><br><br></pre></div>