SOLARARK SOFTWARES High accurate astronomy softwares ALL OF THE SUN, THE MOON AND ALL THE PLANETS OF THE SOLAR SYSTEM - FOR THE YEARS BETWEEN 1900 AND 2100. SOLARARK softwares: THE POSITIONS AND EPHEMERIDES FOR THE SUN, THE EARTH, THE MOON AND THE PLANETS OF THE SOLAR SYSTEM ARE CALCULATED USING THE BRETAGNON AND FRANCOU "VSOP87" (VARIATIONS SÉCULAIRES DES ORBITES PLANÉTAIRES) PLANET THEORY. THIS IS BASED ON THE OLDER JPL DE200 NUMERICAL INTEGRATION (WHICH STILL FORMS THE BASIS OF THE TABULATED PLANETARY POSITIONS IN THE "ASTRONOMICAL ALMANAC". IN ALL CASES, POSITIONS ARE INITIALLY CALCULATED IN A HELIOCENTRIC REFERENCE FRAME, AND THEN RIGOROUSLY REDUCED TO A GEOCENTRIC FRAME, APPLYING CORRECTIONS FOR LIGHT TRAVEL TIME, GRAVITATIONAL DEFLECTION OF LIGHT BY THE PLANET, AND ANNUAL ABERRATION. THE GEOCENTRIC POSITION IS THEN CONVERTED TO A TOPOCENTRIC POSITION . HIGH ACCURATE ASTRONOMY SOFTWARES FOR THE SUN / EARTH, THE MOON AND ALL THE PLANETs OF THE SOLAR SYSTEM SOLARARK SOFTWARES HIGH ACCURATE ASTRONOMY SOFTWARES WIN95, 98, NT4, WIN2000, XP The positions and ephemerides for the Sun, the Earth, the Moon and the planets of the solar system are calculated using the Bretagnon and Francou "VSOP87" (Variations Séculaires des Orbites Planétaires) planet theory. This is based on the older JPL DE200 numerical integration (which still forms the basis of the tabulated planetary positions in the "Astronomical Almanac". In all cases, positions are initially calculated in a heliocentric reference frame, and then rigorously reduced to a geocentric frame, applying corrections for light travel time, gravitational deflection of light by the planet, and annual aberration. The geocentric position is then converted to a topocentric position. SOLAR2010 SOLAR2010 Ephemerides SOLAR2010 calculates daily and yearly positions and ephemerides of the Sun (and the Earth) for years between 1900 and 2100. Calculations and programming 1995-2005 by Jukka T. Tulkki. Program code of the undersigned author contains several hundred pages. READ MORE ... LUNAR2010 LUNAR2010 Ephemerides LUNAR2010 calculates daily and yearly positions and ephemerides of the Moon for years between 1900 and 2100. Calculations and programming 1995-2005 by Jukka T. Tulkki. The methods of calculation bases on VSOP87 (Variations Séculaires des Orbites Planétaires) planetary theory published by Bretagnon – Francou. Program code of the undersigned author contains several hundred pages. READ MORE ... PLANET2010 PLANET2010 Ephemerides PLANET2010 calculates daily and yearly positions of the planets of the solar system for years between 1900 and 2100. Calculations and programming 1995-2005 by Jukka T. Tulkki. The methods of calculation bases on VSOP87 (Variations Séculaires des Orbites Planétaires) planetary theory published by Bretagnon – Francou. Program code of the undersigned author contains several hundred pages. READ MORE ...