Mars24 Sunclock — Time on Mars

The current version of Mars24 is 7.1.0, released 2012-06-30.

Mars24 is a Java application which displays a Mars sunclock, a graphical representation of the planet Mars showing its current sun- and nightsides, along with a numerical readout of the time in 24-hour format. Other displays include a plot showing the relative orbital positions of Mars and Earth and a diagram showing the solar angle and path for a given location on Mars.

Screenshot of sample Mars24 v. 7.1 display

Mars24 runs on many different types of computers, including Windows, Mac OS X, Linux, and more, but it requires Java 1.6 or better be installed on the computer.

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Documentation and Credits

Other information available here includes:

Also on the GISS website is a 1998 Science Brief, "Telling Time on Mars".

For the latest news about the NASA Mars rovers, see the official NASA Mars Rovers website.


If you wish to be notified when new versions of Mars24 are released or if you would like to report a bug, please contact Dr. Robert B. Schmunk.

If you have technical questions about the definition of Mars Solar Time and the mathematical algorithm adopted for its calculation by Mars24, please e-mail Dr. Michael Allison.

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