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Results tagged with orbital-mechanics
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user 16666
Orbital mechanics (also called astrodynamics) is the application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft on an orbital or escape trajectory. For the movements of celestial bodies, use [celestial-mechanics], not this.
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Difficulty trying to use the SPK file ast343de430.bsp
I'm looking for a NAIF SPK file (these typically end in .bsp) for a bunch of asteroids in the J2000 reference frame. I found ast343de430.bsp at ftp://ssd.jpl.nasa.gov/pub/eph/small_bodies/asteroids_de …
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Difficulty trying to use the SPK file ast343de430.bsp
The ast343de430.bsp file looks to be fine. There is only one thing of note - all bodies in this file are referenced to the sun (10) but the ephemeris of the sun is not included. (The reason is given h …
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Keplerian approximations for moons as well as planets
I'm writing code to simulate planetary and lunar orbits in a heliocentric reference plane. I'm using E.M. Standish's Keplerian Elements for Approximate Positions of the Major Planets as my reference a …
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Where to find the best values for standard gravitational parameters of solar system bodies?
If you consider the ephemeris files put out by JPL as the final say in terms of simulations, then the data they put in the PKC files alongside the SPK files are the authoritative value, because that's …
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