Galilean Moons Applet
This applet shows the positions of the Galilean
moons of Jupiter.
Notes:
- North is up in the diagram.
- The applet shows GMT, not your local time.
- To test the applet,
I've looked at the moons about half a dozen times with binoculars,
and apparently the applet gets
the moons' positions about right.
-
I've seen just one eclipse of a Jupiter moon,
with a 102 mm refractor, and
it happened ten minutes after the time
predicted by this applet. So, if you are planning
to observe eclipses, get accurate predictions
elsewhere.
-
I calculate the positions by feeding TU
to the Meeus algorithms, which require TDT.
Therefore, predictions for past centuries are very inaccurate.
-
The sizes of the dots in the applets
have nothing to do with the real sizes of the satellites.
They're different sizes merely for artistic effect.
-
The Spanish version
of this applet comes in a pop-up
window and can be resized.
Astronomy Applets
Solar System Map
Copyright (c) 1999-2008
Jordi Mas Trullenque.
email: jordimastrullenque at gmail dot com
http://purl.oclc.org/net/castro/satgali.en.html
Last revised: 2006-10-10
