diff --git a/kstars/CMakeLists.txt b/kstars/CMakeLists.txt
--- a/kstars/CMakeLists.txt
+++ b/kstars/CMakeLists.txt
@@ -324,7 +324,7 @@
 
     tools/eclipsetool/lunareclipsehandler.cpp
 
-#    tools/jmoontool.cpp
+    tools/jmoontool.cpp
     tools/approachsolver.cpp
     tools/ksconjunct.cpp
     tools/eqplotwidget.cpp
@@ -640,7 +640,7 @@
 set(kstars_skyobjects_SRCS
     skyobjects/constellationsart.cpp
     skyobjects/deepskyobject.cpp
-#    skyobjects/jupitermoons.cpp
+    skyobjects/jupitermoons.cpp
     skyobjects/planetmoons.cpp
     skyobjects/ksasteroid.cpp
     skyobjects/kscomet.cpp
diff --git a/kstars/data/kstarsui.rc b/kstars/data/kstarsui.rc
--- a/kstars/data/kstarsui.rc
+++ b/kstars/data/kstarsui.rc
@@ -79,7 +79,7 @@
                 <Action name="scriptbuilder" />
                 <Action name="solarsystem" />
                 <Action name="ekos" />
-<!--                <Action name="jmoontool" /> -->
+                <Action name="jmoontool" />
                 <Action name="flagmanager" />
         </Menu>
 
diff --git a/kstars/kstars.h b/kstars/kstars.h
--- a/kstars/kstars.h
+++ b/kstars/kstars.h
@@ -57,7 +57,7 @@
 class SkyCalendar;
 class ScriptBuilder;
 class PlanetViewer;
-//class JMoonTool;
+class JMoonTool;
 class MoonPhaseTool;
 class FlagManager;
 class Execute;
@@ -610,7 +610,7 @@
         void slotSolarSystem();
 
         /** action slot: open Jupiter Moons tool */
-        //    void slotJMoonTool();
+        void slotJMoonTool();
 
         /** action slot: open Moon Phase Calendar tool */
         void slotMoonPhaseTool();
@@ -836,7 +836,7 @@
         ScriptBuilder *m_ScriptBuilder { nullptr };
         PlanetViewer *m_PlanetViewer { nullptr };
         WUTDialog *m_WUTDialog { nullptr };
-        //    JMoonTool *m_JMoonTool { nullptr };
+        JMoonTool *m_JMoonTool { nullptr };
         FlagManager *m_FlagManager { nullptr };
         HorizonManager *m_HorizonManager { nullptr };
         EyepieceField *m_EyepieceView { nullptr };
diff --git a/kstars/kstarsactions.cpp b/kstars/kstarsactions.cpp
--- a/kstars/kstarsactions.cpp
+++ b/kstars/kstarsactions.cpp
@@ -58,6 +58,7 @@
 #include "tools/horizonmanager.h"
 #include "tools/observinglist.h"
 #include "tools/planetviewer.h"
+#include "tools/jmoontool.h"
 #include "tools/scriptbuilder.h"
 #include "tools/skycalendar.h"
 #include "tools/wutdialog.h"
@@ -593,12 +594,13 @@
         m_PlanetViewer = new PlanetViewer(this);
     m_PlanetViewer->show();
 }
-/*
+
 void KStars::slotJMoonTool() {
-    if ( ! m_JMoonTool ) m_JMoonTool = new JMoonTool(this);
+    if (!m_JMoonTool)
+        m_JMoonTool = new JMoonTool(this);
     m_JMoonTool->show();
 }
-*/
+
 
 void KStars::slotMoonPhaseTool()
 {
diff --git a/kstars/kstarsinit.cpp b/kstars/kstarsinit.cpp
--- a/kstars/kstarsinit.cpp
+++ b/kstars/kstarsinit.cpp
@@ -453,9 +453,9 @@
             << i18n("Solar System") << QKeySequence(Qt::CTRL + Qt::Key_Y);
 
     // Disabled until fixed later
-    /*actionCollection()->addAction("jmoontool", this, SLOT(slotJMoonTool()) )
+    actionCollection()->addAction("jmoontool", this, SLOT(slotJMoonTool()) )
         << i18n("Jupiter's Moons")
-        << QKeySequence(Qt::CTRL+Qt::Key_J );*/
+        << QKeySequence(Qt::CTRL+Qt::Key_J );
 
     actionCollection()->addAction("flagmanager", this, SLOT(slotFlagManager())) << i18n("Flags");
 
diff --git a/kstars/tools/jmoontool.cpp b/kstars/tools/jmoontool.cpp
--- a/kstars/tools/jmoontool.cpp
+++ b/kstars/tools/jmoontool.cpp
@@ -18,12 +18,15 @@
 
 #include "ksnumbers.h"
 #include "kstars.h"
+
+#include "skymapcomposite.h"
 #include "skyobjects/jupitermoons.h"
 #include "skyobjects/ksplanet.h"
 #include "skyobjects/kssun.h"
 
 #include <KPlotting/KPlotObject>
 #include <KPlotting/KPlotWidget>
+#include <KPlotAxis>
 
 #include <QFrame>
 #include <QGridLayout>
@@ -126,6 +129,19 @@
     QRectF dataRect = pw->dataRect();
     double dy       = 0.01 * dataRect.height();
 
+    /*Debug
+    //For testing position of each satellite
+    for(double t = dataRect.y(); t <= dataRect.bottom(); t += 1){
+        KSNumbers num(jd0 + t);
+        jm.findPosition(&num, jup, ksun);
+
+        qDebug() << "Position [Io] : " << 0.5 * jup->angSize() * jm.x(0) << " at " << t << " arcmin";
+        qDebug() << "Position [Europa] : " << 0.5 * jup->angSize() * jm.x(1) << " at " << t << " arcmin";
+        qDebug() << "Position [Ganymede] : " << 0.5 * jup->angSize() * jm.x(2) << " at " << t << " arcmin";
+        qDebug() << "Position [Callisto] : " << 0.5 * jup->angSize() * jm.x(3) << " at " << t << " arcmin";
+    }
+    */
+
     //t is the offset from jd0, in days.
     for (double t = dataRect.y(); t <= dataRect.bottom(); t += dy)
     {