How to find Planet Position using skyfield

Question

I want to find planet position using skyfield in the form of Ecliptic longitude,latitude, speed and distance in geocentric

There are some documentation here https://rhodesmill.org/skyfield/positions.html#positions-and-coordinates — Gonzalo Odiard, Nov 18 '21 at 19:57

score 2 · Accepted Answer · answered Nov 18 '21 at 21:47

You will probably want to go ahead and read the Skyfield documentation — have you made it very far yet, or are you still at the beginning? One of its earliest sections is its Examples:

https://rhodesmill.org/skyfield/examples.html

By searching that web page for concepts you are interested in, you can sometimes skip reading the full documentation — for example, try searching for the phrase “ecliptic longitude” and you’ll find an example where it’s computed for the Moon.

score -2 · Answer 2 · answered Nov 18 '21 at 18:48

I'm not sure that you realize that you're asking a very difficult question. The motions of the planets are not simple ellipses. How much precision do you need? Are you asking for a program that will work for this year, for this decade, for this century?

A good introduction can be found here. For more information, you really need to take a course on planetary dynamics. I believe that NASA has some Fortran code (the SPICE kernel) that is used for their spacecraft.

How to find Planet Position using skyfield

2 Answers2