## AboutOrbites lois Kepler et Newton

Orbits, Kepler and Newton laws ..English and French

PRESENTATION:
This software can calculate orbits of the planets of the solar system. A planet , size of an asteroid can also be created.
A satellite can be placed in orbit , trajectory is an ellipse or a hyperbola in the conditions of position and initial velocity. After calculation, a simulation of the movement is feasible.
The main data of the trajectory can be displayed properly

DESCRIPTION
A first line of buttons allows you to choose a planet around which will evolve the satellite; with the Plx button you can define an asteroid or a planet giving the mass; the minimum mass is 100 million tonnes, an asteroid of nearly 1km in diameter; the other buttons include the planets of the solar system with their dimensions and masses known.

The second line is used to define the distance unit and distance (A.U. or astronomical unit (average distance from the Earth to the Sun), E6 km (1 million km), E3 Km (1000 km) and Km; for example, choosing the planet Ea(earth) and E3 and 10 on the keyboard gives a distance of 10 000 km, the satellite is up to 10 000 km from the center of the earth on the X axis (horizontal).
An indication of the satellite velocity is given for a circular path and the top speed for an elliptical trajectory.

On the third line is defined radial velocity (Vx) and the tangential speed (Vy) in km / sec.

Finally the Calculation button launches the trajectory calculation; the data button gives the main data of the trajectory.(Hide with long click)
If the distance is not changed, several calculations can be run showing the trajectory of changes following the speed changes.
A simulation button starts a movement of the satellite on its trajectory; Long press Stop returns to the calculations page.
The language may be amended after a long press on Information and reboot.

In example (data from earth to perihelion)
-Planete S
-Distance, Choice Km and 147,098,074
-Speed X: 0, y speed: 30.291
or (international station)
-Planete Ea
-Distance, Choice Km and 6720
-Speed Vx: 0, Vy: 7.7
or (Rosetta)
-Planete Plx and 100 for a mass of the comet P67 of 1E13 Kg
-Distance 15 Km
-speed X 0, y = 0.00025
----------------------------
For information, perihelion and speed (at per)of planets of solar system:
Mercure 46,001,272 Km 58.98 Km / s
Venus 107,476,259 35.26
Earth 147 098 074 30.291
Mars 206 644 545 26.5
Jupiter 740,520,000 13.71
Saturn 1349 467 375 10.183
Uranus 2748 938 461 7.1
Neptune 4452 940 833 5.487

Orbites , lois de Kepler et Newton
PRESENTATION:
Ce logiciel permet de calculer des orbites autour des planetes du systeme solaire.Ici , le satellite en orbite a une masse négligeable devant la planete (comme la terre autour du soleil) et n'a pas d'infuence sur le mouvement de la planète (pas comme la lune , qui dans sa rotation , fait bouger la terre) Une planete de la dimension d'un asteroide peut aussi etre cree .
Un satellite peut etre place en orbites et la trajectoire sera une ellipse ou une hyperbole selon les conditions de position et de vitesse initiale. Apres calcul ,une simulation du mouvement est realisable.
Les donnees principales de la trajectoire peuvent etre affichees

DESCRIPTION:
Une premiere ligne de boutons permet de choisir une planete autour de laquelle va evoluer le satellite ; le bouton Plx permet de definir un asteroide ou une planete en indiquant la masse ; la masse minimale est de 100 millions de tonnes , soit un asteroide de pres de 1Km de diametre ;pour
les autres boutons on retrouve les planetes du systeme solaire avec leur dimensions et masses connues.

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