Galilean for Phones

Galilean for Phones


(4 stars)


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100 - 500 downloads

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Galilean is software to help plan and assist observations of the major four jovian satellites, also called the Galilean Moons.

Meteorites and artificial satellites excepted, nothing moves faster in the eyepiece than Io, Europa, Ganymede and Callisto. For this reason, these brightest moons of Jupiter are most popular and easy targets for binoculars and telescopes alike.

Galilean plots current and time-shifted positions of the moons, both as on-north orbit view and edge-on, while the latter can be tilted to Jupiter's rotation axis (geocentric) or parallactic angle (topocentric), if Jupiter is above horizon. Transiting moons and their shadows are plotted on an enlarged view of the planet. For curiosity, triple shadow events can be simulated from a list of occurrences between the years 1901 and 2092.

Galilean also computes detailed physical and positional ephemerides for Jupiter and the moons, as well as countdown for the transit of the GRS. Furthermore, a chart is provided showing Jupiter's elongation from the Sun.


* Orbit and edge-on views
* Tilted edge-on views
* Views through various optics
* Time shift ±10 min, ±1 hour, ±1 day
* Selectable date and time
* Rise, set and transit times
* Jupiter ephemerides
* Jupiter moons ephemerides
* Rectangular coordinates
* Spheric (3D globe) views of the Jovian moons
* GPS-enabled or manual input
* No internet connection required
* Runs in full-screen portrait mode
* Simple operation


This application is believed to be reliable and accurate, however, errors inherent to the human factor or operating system implementation cannot be ruled out entirely.

1. This application is designed for phones and tablets and operates in portrait mode only.
2. Please be so kind as to send a report preferably with screen snap should you encounter any layout issues.
3. This application requires Android 2.2 or higher and a display which is to the Android standard.
4. Please contact the author, if you have any pre-sales questions.

Tags: galilean free, jupiter current rotation, jovian satellite widget, galilean moons, galiliean, best galillean moons, satellites jupiter, jupitermoons, jupiter satellites ephemeris time, plot galilean satellites.

Recently changed in this version

Ver 1.13: GRS longitude updated, please set to 222 degrees.
Ver 1.12: Repairs the time shift buttons, sorry folks.
Ver 1.11: Higher compatibility with more screen configurations. Layout fixes.
Ver 1.10: adds moon position chart (see screen snap #4)
Ver 1.09: Shadow of spheres can be placed at will, elongation chart set to orbit scale, minor adjustments.
Ver 1.08: Minor design/layout trimmings, bug fix
Ver 1.07: Error in Settings fixed (apologies to all)

Comments and ratings for Galilean for Phones
  • (64 stars)

    by Mike FaJohn on 29/12/2013

    As an Astronomer and Jupiter enthusiast, This app has made my life so much easier. Most other apps associated with the Jovian system are hard to understand and give a bunch of pointless information and graphs that have no real use for the visual observer. Galilean for phones is exactly what I wanted. Not only does it display the current location of each of the Galilean moons but it updates you in

  • (64 stars)

    by David Rankin on 28/12/2013

    If you are an imager, this is a must have.