# TLE data conversion to osculating orbit elements [closed]

I got the latest TLE from www.celestrak.com for a satellite. How could I convert it to osculating elements?

## closed as unclear what you're asking by uhoh, Tristan, Mark Omo, Rory Alsop, ForgeMonkeyMar 11 '18 at 12:55

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• Then I don't understand what you are asking at all. Those have almost nothing to do with TLEs. Also I think you are just asking about a Keplerian orbit, not an osculating orbit. There are answers here already about nodal precession, and getting the mean anomaly vs time. I'd recommend you check existing answers. – uhoh Mar 9 '18 at 15:04
• @uhoh I mentioned TLEs because that data is available in satellite database (celestrak, space-track). I didn't find Keplerian elements for on-orbit satellites, just TLEs – Tarlan Mammadzada Mar 9 '18 at 15:40
• I think it would be a good idea to explain with more detail what kind of data you have to start with, and what kind of values you would like to calculate from it. – uhoh Mar 9 '18 at 16:19
• "...the changes in Keplerian elements with time." is a textbook definition of perturbations, so saying "ignoring perturbations" does not make sense. According to Wikipedia's article Orbital perturbation analysis: "In reality, there are several factors that cause the conic section to continually change. These deviations from the ideal Kepler's orbit are called perturbations." The orbital perturbation equations you now show are given in there as well. Also I still think you mean *Keplerian" orbit, not "osculating" orbit. – uhoh Mar 10 '18 at 3:05
• @uhoh Thanks. Sorry for confusing question. I accepted the answer here, and asked another question, explaining what I'm trying to do. space.stackexchange.com/q/25964/19219 – Tarlan Mammadzada Mar 10 '18 at 12:00