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+/***************************************************************************
+                          kscomet.h  -  K Desktop Planetarium
+                             -------------------
+    begin                : Wed 19 Feb 2003
+    copyright            : (C) 2001 by Jason Harris
+    email                : jharris@30doradus.org
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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 KSCOMET_H
+#define KSCOMET_H
+
+#include "ksplanetbase.h"
+
+/**@class KSComet 
+	*@short A subclass of KSPlanetBase that implements comets.
+	*
+	*The orbital elements are stored as private member variables, and
+	*it provides methods to compute the ecliptic coordinates for any
+	*time from the orbital elements.
+	*
+	*The orbital elements are:
+	*@li JD    Epoch of element values
+	*@li q     perihelion distance (AU)
+	*@li e     eccentricity of orbit
+	*@li i     inclination angle (with respect to J2000.0 ecliptic plane)
+	*@li w     argument of perihelion (w.r.t. J2000.0 ecliptic plane)
+	*@li N     longitude of ascending node (J2000.0 ecliptic)
+	*@li Tp    time of perihelion passage (YYYYMMDD.DDD)
+	*
+	*@author Jason Harris
+	*@version 1.0
+	*/
+
+class KStarsData;
+class KSNumbers;
+class dms;
+
+class KSComet : public KSPlanetBase
+{
+	public:
+		/**Constructor.
+			*@p kd pointer to the KStarsData object
+			*@p s the name of the comet
+			*@p image_file the filename for an image of the comet
+			*@p JD the Julian Day for the orbital elements
+			*@p q the perihelion distance of the comet's orbit (AU)
+			*@p e the eccentricity of the comet's orbit
+			*@p i the inclination angle of the comet's orbit
+			*@p w the argument of the orbit's perihelion
+			*@p N the longitude of the orbit's ascending node
+			*@p M the mean anomaly for the Julian Day
+			*@p Tp The date of the most proximate perihelion passage (YYYYMMDD.DDD)
+			*/
+		KSComet( KStarsData *kd, QString s, QString image_file,
+			long double JD, double q, double e, dms i, dms w, dms N, double Tp );
+
+		/**Destructor (empty)*/
+		virtual ~KSComet() {}
+
+		/**Unused virtual function inherited from KSPlanetBase, 
+			*so it's simply empty here.
+			*/
+		virtual bool loadData();
+
+
+	protected:
+	/**Calculate the geocentric RA, Dec coordinates of the Comet.
+		*@note reimplemented from KSPlanetBase
+		*@param num time-dependent values for the desired date
+		*@param Earth planet Earth (needed to calculate geocentric coords)
+		*@return true if position was successfully calculated.
+		*/
+		virtual bool findGeocentricPosition( const KSNumbers *num, const KSPlanetBase *Earth=NULL );
+
+	private:
+		KStarsData *kd;
+		long double JD, JDp;
+		double q, e, a, P;
+		dms i, w, N;
+
+};
+
+#endif