Sol date:

Earth rise:
Earth set:

This site keeps time at NASA's MSL Curiosity rover and calculates positional data of the Sun and Earth as observed at the landing site. It is basically laid out for large 16:9 monitors, however, tables can be closed or elements be removed to accomodate smaller screen sizes. This site is not designed for mobile devices.


A Little Help
Data Tables

At page load the Time tables are opened while the Data tables are closed. Click on each [+] to open a table. In "Local Times" click on "Azm (x)" to add and remove azimuthes of rise and set times.

Toggle Analog Clock

The analog clock is displayed by default. Click on "clock (x)" in the Martian Time table to toggle on and off.

Toggle Time Definitions

The default time is LMST. Click on "LMST" at the top of the analog clock to change definitions.

Toggle Time on Mars

By default, Time on Mars is shown in martian time. Click on "Time on Mars" to switch to Earth time. Click again to return.

Mission Time Menu

The menu buttons toggle various functions. "clock" toggles the analog clock on and off, "gallery" opens and closes the image gallery, "zone" toggles through martian time definitions, "news" toggles through NASA news headlines.

News Headlines

Click on the "news" menu button to browse Curiosity, Breaking News, Solar System and Universe RSS news feeds provided online by NASA. News are displayed by default. Click anywhere on the news to remove the frame. Click again on the news menu button to display.

Weather Station

Click on the "weather" menu button to open. Click anywhere on the weather station to remove the frame. Click again on the weather menu button to display.

Star Charts

Open the tables Seasonal Data, Sun Data, Earth Data or Astronomy at the right and click on "Open" next to Star chart:". Star charts are centered on sidereal time, Sun and Earth, respectively, all as observed on the landing site.

Image Gallery

By default, the image gallery is hidden. Click on the rover camera image at the footer of the page to toggle the gallery on and off. Use the mouse wheel to browse through the images.

Image Explorer

Click on "Explore" at the right of the header to open a menu showing thumbnail images from which to select. A selected image is opened in a separate window.

Toggle Backgrounds

Click on "Backgrounds" at the right of the header to open a menu showing thumbnail images from which to select various background images. The first on the list is the default at page load.

Toggle Elements

Click on the counter icon at the right of the header to toggle the access counter on and off.

Toggle Android Intros

Click on the Android icon at the right of the header to toggle the introductions on and off.

Further Hints

Move and hold the mouse over a term in the left column of a time or data table to view explanations.


Click anywhere in Help or again on the HELP icon to close this frame.

Loading news...
10 - 30°0 - 61.261.2Northern hemisphere spring equinox at Ls=0°
230 - 60°61.2 - 126.665.4
360 - 90°126.6 - 193.366.7Aphelion (largest Sun-Mars distance) at Ls=71°
490 - 120°193.3 - 257.864.5Northern hemisphere summer solstice at Ls=90°
5120 - 150°257.8 - 317.559.7
6150 - 180°317.5 - 371.954.4
7180 - 210°371.9 - 421.649.7Northern hemisphere autumn equinox at Ls=180°, begin of dust storm season.
8210 - 240°421.6 - 468.546.9Dust storm season
9240 - 270°468.5 - 514.646.1Perihelion (smallest Sun-Mars distance) at Ls=251°, dust storm season
10270 - 300°514.6 - 562.047.4Northern hemisphere Winter Solstice at Ls=270°, dust storm season
11300 - 330°562.0 - 612.950.9Dust storm season
12330 - 360°612.9 - 668.655.7End of dust storm season

Weather Station

REMS Report

Centro de Astrobiologia