The Ecliptic system is more natural for solar system objects. The galactic system nice for deep space objects. The lack of a single natural plane in the sky means that several different …

2021年4月27日 · The ecliptic is the apparent path of the Sun in the sky over the year—it corresponds to the plane of the Earth’s orbit around the Sun. Coordinates in the ecliptic …

2024年3月26日 · The ecliptic longitudes reported above by Horizons are with reference to the J2000 ecliptic and equinox, not the "of date" ecliptic and equinox. By the way, the recent …

2023年3月29日 · Typically, the solar ecliptic longitude is calculated relative to the centre of the Earth. There is a small difference to the observed longitude at a given location on the Earth's …

2016年5月26日 · When looking for a formula to convert polar ecliptic geocentric coordinates of an object to equatorial coordinates I find various sources that give these formulae (like …

2023年5月9日 · $\begingroup$ I suggest using J2000.0 ecliptic coords, since the trajectory is close to the ecliptic, and you can easily get data using J2000 from Horizons. $\endgroup$ – …

2019年10月16日 · Motion of Planets. Yes, you can define a planets position with only time as a coordinate. building blocks. I think part of what you are asking for are orbital state vectors, the …

Navigating the solar system, you'd probably track your probe using Earth-based radio telescopes in the equatorial ICRF, though you might describe the overall trajectory in terms of the ecliptic. …

2024年7月2日 · Now we establish a coordinate system with lunar great circle as its great circle, it is just like any other spherical coordinate system. For simplicity, define lunar longitude as the …

2016年1月31日 · The equatorial plane and the ecliptic plane cross each other, like shown in this illustration: The "Vernal Equinox" is simply the direction of the line where they cross. You can …