Kiwanis Chico Community Observatory







Message Group




    Mars was also a planet known by the ancients, depicted as the Roman god of war (Ares in Greek mythology) possibly because of the planet's blood red color. 


Mass -- 6.42 x 1023 kg   (0.107 earth masses)


Radius -- 2,111 mi   (3,397 km or 0.5326 earth radii)


Distance from the sun (average) -- 141,633,260 mi   (227,936,640 km or 1.5237 AU)


Gravity -- 12.12 ft/sq. sec   (3.69 m/sq. sec)

    An adult weighing 140 lbs on Earth would weigh 53 lbs on Mars.


Maximum surface temperature -- 25 F


Minimum surface temperature -- -125 F


Orbital velocity -- 53,979 mph   (86,871 km/hr or 0.810 earth speed)


Orbital eccentricity -- 0.0934

    This is how off-circular the moon's orbit around the Earth is.  An eccentricity of 0.00 would be a perfect circle.  An eccentricity of nearly 1 would be a very flattened oval.  For a fun project on ellipses and eccentricity, click here.


Sidereal rotation -- 24.64 hr   (1.026 earth days)

    A day on Mars is pretty close to a day on Earth.


Sidereal orbit -- 16,486 hr   (687 earth days or 1.881 earth years)

    A year on Mars is nearly two Earth years.


Moons -- Phobos and Deimos



For more information on Mars, please visit SEDS' website and NASA's website  Both websites are wonderful resources.


Our Sun

Our Moon

Solar System

Deep Sky Objects




Website last updated March 16,  2006.  Hosted by Anthony Watts, KMXI Radio.  Webmasters Tiara Norris and Brendan Diamond.