1 /**************************************************************************
3 * Written by Durk Talsma. Originally started October 1997, for distribution
4 * with the FlightGear project. Version 2 was written in August and
5 * September 1998. This code is based upon algorithms and data kindly
6 * provided by Mr. Paul Schlyter. (pausch@saaf.se).
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 **************************************************************************/
26 # define exception c_exception
32 /*************************************************************************
33 * Venus::Venus(double mjd)
34 * Public constructor for class Venus
35 * Argument: The current time.
36 * the hard coded orbital elements for Venus are passed to
37 * CelestialBody::CelestialBody();
38 ************************************************************************/
39 Venus::Venus(double mjd) :
40 CelestialBody(76.67990, 2.4659000E-5,
42 54.89100, 1.3837400E-5,
45 48.00520, 1.60213022440, mjd)
49 CelestialBody(76.67990, 2.4659000E-5,
51 54.89100, 1.3837400E-5,
54 48.00520, 1.60213022440)
58 /*************************************************************************
59 * void Venus::updatePosition(double mjd, Star *ourSun)
61 * calculates the current position of Venus, by calling the base class,
62 * CelestialBody::updatePosition(); The current magnitude is calculated using
63 * a Venus specific equation
64 *************************************************************************/
65 void Venus::updatePosition(double mjd, Star *ourSun)
67 CelestialBody::updatePosition(mjd, ourSun);
68 magnitude = -4.34 + 5*log10( r*R ) + 0.013 * FV + 4.2E-07 * pow(FV,3);