# What are the azimuths of the planets' orbits?

I am creating a virtual solar system model and I want it to be as realistic as possible (e.g. orbits are ellipses, not circles, and orbits are oriented correctly, not all coplanar). In order for me to do this, I need to know the eccentricity of the orbit, the perihelion, the semi-major-axis, inclination and azimuth. I have all of this information, except for the azimuth of the orbit, which is the angle from the sun to the aphelion. Are there any reliable sources with this information?

• en.wikipedia.org/wiki/Orbital_elements – rnrneverdies Nov 18 '14 at 2:53
• Can you please give a better definition of azimuthal angle in this case? Even better, would be if you would use the right terminology, according to the page linked by the OP above. – Py-ser Nov 18 '14 at 8:52
• As noted in the wikipedia article, one needs seven parameters to specify an orbit, the epoch time plus a set of six values that represent the orbit at that point in time. The canonical set is $a$, $e$, $i$, $\Omega$, $\omega$, $M_0$, and $t_0$ (semi-major axis, eccentricity, inclination, right ascension of ascending node, argument of perigee, mean anomaly, and epoch time). Vinnie Caprarola, you only list five parameters in your question. – David Hammen Nov 18 '14 at 9:31
• Are you creating a static model or a dynamic model where the planets actually move over time? If dynamic, you'll want to use SPICE files for uber-accuracy. Are you modeling planetary moons as well? – user21 Nov 19 '14 at 13:17