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Astronomical Ephemerides
For any time span or location, even offline!

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What time argument is used? What type of positions are computed?
Copyright (C) 2018 Alexandru Garofide <alexandru.garofide@gmail.com>

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

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About


Mercury

For Transits, click here. 
            
 

Venus

For Transits, click here. 
            
 

Mars

                
 
Positional ephemeris
Physical ephemeris

Jupiter

For Elongations of Galilean Moons, click here.
                
 
Positional ephemeris
Physical ephemeris

Saturn

For Elongations of Saturn's Moons, click here.
            
 

Uranus

            
 

Neptune

            
 

Moon

For Lunar Eclipses, click here. For Occultations, click here. For Lunar X events, click here. 
            
 

Elongations of Galilean Moons


The following colors were used to represent each moon:
  • Io is represented in blue color
  • Europa is represented in red color
  • Ganymede is represented in green color
  • Callisto is represented in black color
Jupiter is represented in orange color

East is on the left side, West is on the right side.
 

Elongations of Saturn's Moons


The following colors were used to represent each moon:
  • Mimas is represented in blue color
  • Enceladus is represented in red color
  • Tethys is represented in green color
  • Dione is represented in black color
  • Rhea is represented in magenta color
  • Titan is represented in grey color
Saturn is represented in orange color

East is on the left side, West is on the right side.
 

Lunar Eclipses

Accuracy of the times displayed below is about 1 minute. Hashed phases are not visible from your location (Moon is below horizon).
 

Solar Eclipses

To obtain the value of a given Besselian element for a given time T, compute it in the following manner:

    t = T - T0
    A(t) = A0 + t * A1 + t2 * A2 + t3 * A3

where t is hours and A is any of the elements from the tables below.

The values from the table are valid for a time interval from T0 - 3h to T0 + 3h.

x, y, l1 and l2 are in Earth radii.
μ and d are in sexagesimal degrees (°)
 

Occultations

Accuracy of the times displayed below is about 1 minute. Position angles are in sexagesimal degrees (°)
 

Transits

Accuracy of the times displayed below is about 1 minute. Position angles are in sexagesimal degrees (°)
 

Lunar X

Accuracy of the times displayed below is about 10 minutes.
 

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