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/***************************************************************************
ksasteroid.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 KSASTEROID_H
#define KSASTEROID_H
#include "ksplanetbase.h"
/**@class KSAsteroid
*@short A subclass of KSPlanetBase that implements asteroids.
*
*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 a semi-major axis length (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 M mean anomaly at epoch JD
*@li H absolute magnitude
*
*@author Jason Harris
*@version 1.0
*/
class KStarsData;
class KSNumbers;
class dms;
class KSAsteroid : public KSPlanetBase
{
public:
/**Constructor.
*@p kd pointer to the KStarsData object
*@p s the name of the asteroid
*@p image_file the filename for an image of the asteroid
*@p JD the Julian Day for the orbital elements
*@p a the semi-major axis of the asteroid's orbit (AU)
*@p e the eccentricity of the asteroid's orbit
*@p i the inclination angle of the asteroid'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 H absolute magnitude
*/
KSAsteroid( KStarsData *kd, TQString s, TQString image_file,
long double JD, double a, double e, dms i, dms w, dms N, dms M, double H );
/**Destructor (empty)*/
virtual ~KSAsteroid() {}
/**This is inherited from KSPlanetBase. We don't use it in this class,
*so it is empty.
*/
virtual bool loadData();
protected:
/**Calculate the geocentric RA, Dec coordinates of the Asteroid.
*@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 );
//these set functions are needed for the new KSPluto subclass
void set_a( double newa ) { a = newa; }
void set_e( double newe ) { e = newe; }
void set_P( double newP ) { P = newP; }
void set_i( double newi ) { i.setD( newi ); }
void set_w( double neww ) { w.setD( neww ); }
void set_M( double newM ) { M.setD( newM ); }
void set_N( double newN ) { N.setD( newN ); }
void setJD( long double jd ) { JD = jd; }
private:
KStarsData *kd;
long double JD;
double a, e, H, P;
dms i, w, M, N;
};
#endif
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