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Astrolog can do forms of locational astrology such as astrocartography. [1] Recent versions use the tz database for time zone and daylight saving time detection. All versions of Astrolog have been distributed with source code, and the most recent versions are free software under the GNU General Public License. Several different parties have ...
Software libraries exist to aid in the development of astronomical software. These libraries can also be leveraged for use in astrological projects. One such tool is Swiss Ephemeris, which is an astronomical almanac developed by Astrodienst AG, Switzerland, the makers of Astrolog. It is widely used for calculating the positions of planets ...
In astronomy and celestial navigation, an ephemeris (/ ɪ ˈ f ɛ m ər ɪ s /; pl. ephemerides / ˌ ɛ f ə ˈ m ɛr ɪ ˌ d iː z /; from Latin ephemeris 'diary', from Ancient Greek ἐφημερίς (ephēmerís) 'diary, journal') [1] [2] [3] is a book with tables that gives the trajectory of naturally occurring astronomical objects and artificial satellites in the sky, i.e., the position ...
The term ephemeris time (often abbreviated ET) can in principle refer to time in association with any ephemeris (itinerary of the trajectory of an astronomical object). In practice it has been used more specifically to refer to: a former standard astronomical time scale adopted in 1952 by the IAU, [1] and superseded during the 1970s. [2]
XEphem started as a Unix and Motif conversion of the IBM PC-based ephem.It was initially released in December 1993 with version 2.5. [citation needed] Its commercial edition was discontinued in 2016; the free version continued to be offered as proprietary software. [3]
The Astronomical Almanac [1] is an almanac published by the United Kingdom Hydrographic Office; it also includes data supplied by many scientists from around the world.On page vii, the listed major contributors to its various Sections are: H.M Nautical Almanac Office, United Kingdom Hydrographic Office; the Nautical Almanac Office, United States Naval Observatory; the Jet Propulsion Laboratory ...
A fundamental ephemeris of the Solar System is a model of the objects of the system in space, with all of their positions and motions accurately represented. It is intended to be a high-precision primary reference for prediction and observation of those positions and motions, and which provides a basis for further refinement of the model.
ELP gives a series expansion of the orbital elements and the coordinates of the Moon.The authors refer to it as a "semi-analytical" theory because they developed their expressions not purely symbolically, but introduced numerical values for orbital constants from the outset; but they also constructed partial derivatives of all terms with respect to these constants, so they could make ...