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 library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
23 **************************************************************************/
29 /*************************************************************************
30 * Venus::Venus(double mjd)
31 * Public constructor for class Venus
32 * Argument: The current time.
33 * the hard coded orbital elements for Venus are passed to
34 * CelestialBody::CelestialBody();
35 ************************************************************************/
36 Venus::Venus(double mjd) :
37 CelestialBody(76.67990, 2.4659000E-5,
39 54.89100, 1.3837400E-5,
42 48.00520, 1.60213022440, mjd)
46 CelestialBody(76.67990, 2.4659000E-5,
48 54.89100, 1.3837400E-5,
51 48.00520, 1.60213022440)
55 /*************************************************************************
56 * void Venus::updatePosition(double mjd, Star *ourSun)
58 * calculates the current position of Venus, by calling the base class,
59 * CelestialBody::updatePosition(); The current magnitude is calculated using
60 * a Venus specific equation
61 *************************************************************************/
62 void Venus::updatePosition(double mjd, Star *ourSun)
64 CelestialBody::updatePosition(mjd, ourSun);
65 magnitude = -4.34 + 5*log10( r*R ) + 0.013 * FV + 4.2E-07 * pow(FV,3);