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+/***************************************************************************
+                          kssun.h  -  K Desktop Planetarium
+                             -------------------
+    begin                : Sun Jan 29 2002
+    copyright            : (C) 2002 by Mark Hollomon
+    email                : mhh@mindspring.com
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef KSSUN_H
+#define KSSUN_H
+
+#include <qstring.h>
+#include "ksplanet.h"
+
+/**@class KSSun
+	*Child class of KSPlanetBase; encapsulates information about the Sun.
+	*@short Provides necessary information about the Sun.
+	*@author Mark Hollomon
+	*@version 1.0
+	*/
+
+class KStarsData;
+
+class KSSun : public KSPlanet  {
+public:
+/**Constructor.  Defines constants needed by findPosition().
+	*Sets Ecliptic coordinates appropriate for J2000.
+	*@param kd pointer to KStarsData object
+	*@param fn filename of Sun image
+	*@param pSize physical diameter of the Sun, in km
+	*/
+	KSSun(KStarsData *kd, QString fn = "", double pSize=0 );
+
+/**Destructor (empty)
+	*/
+	virtual ~KSSun() {}
+
+/**Read orbital data from disk
+	*@note reimplemented from KSPlanet
+	*@note we actually read Earth's orbital data.  The Sun's geocentric
+	*ecliptic coordinates are by definition exactly the opposite of the 
+	*Earth's heliocentric ecliptic coordinates.
+	*/
+	virtual bool loadData();
+
+	long double springEquinox(int year);
+
+	long double summerSolstice(int year);
+
+	long double autumnEquinox(int year);
+
+	long double winterSolstice(int year);
+	
+	long double equinox(int year, int d, int m, double angle);
+
+
+protected:
+/**Determine geocentric RA, Dec coordinates for the Epoch given in the argument.
+	*@p Epoch current Julian Date
+	*@p Earth pointer to earth object
+	*/
+	virtual bool findGeocentricPosition( const KSNumbers *num, const KSPlanetBase *Earth=NULL );
+};
+	long double equinox(int year, int d, int m, int angle);
+
+#endif