TheSkyLive - Your Guide to the Solar System and the Night Sky
https://theskylive.comFind information, position data and sky charts for Planets, Asteroids , Comets, Interplanetary Probes . Use our Observing Guide to plan observations of the Solar System objects visible tonight from your location. Create accurate and interactive maps of the sky visible from any location up to the December 31 2099 using our Online Planetarium .
Alcyone Astronomical Software - ephemeris software ...
www.alcyone.deAlcyone Ephemeris 4.3 is an accurate and fast astronomical ephemeris calculator covering the period 3000 BC to AD 3000. It calculates heliocentric, geocentric, and topocentric positions of the Sun (Earth), planets, 18 natural satellites, and small bodies (minor planets and comets) in ecliptical, equatorial, and horizontal coordinates, with optional corrections for parallax and …
Computing Planetary Positions - stjarnhimlen.se
stjarnhimlen.se/comp/ppcomp.htmlIf one wishes to compute the planet's position for some standard epoch, such as 1950.0 or 2000.0 (e.g. to be able to plot the position on a star atlas), one must add the correction below to lonecl. If a planet's and not the Moon's position is computed, one must also add the same correction to lonsun, the Sun's longitude.