342
SYNOPTICAL TABLES
{|style="width:100%;"
|+MARS. |- |style="vertical-align:top;"|Volume (Earth's = 1), |style="vertical-align:bottom;text-align:right;"|0.1364 |- |style="vertical-align:top;"|Mass (Earth's = 1), |style="vertical-align:bottom;text-align:right;"|0.1324 |- |style="vertical-align:top;"|Density (Earth's = 1), |style="vertical-align:bottom;text-align:right;"|0.972 |- |style="vertical-align:top;"|Diameter (Earth's = 1), |style="vertical-align:bottom;text-align:right;"|0.519 |- |style="vertical-align:top;"|Diameter in miles, |style="vertical-align:bottom;text-align:right;"|4070 |- |style="vertical-align:top;"|Diameter, apparent, mean, |style="vertical-align:bottom;text-align:right;"|5″.8 |- |style="vertical-align:top;"|Diameter, apparent, minimum, |style="vertical-align:bottom;text-align:right;"|3″.3 |- |style="vertical-align:top;"|Diameter, apparent, maximum. |style="vertical-align:bottom;text-align:right;"|23″-5 |- |style="vertical-align:top;"|Gravity (Earth's = 1), |style="vertical-align:bottom;text-align:right;"|0.49 |- |style="vertical-align:top;"|In one second of time bodies fall, in feet, |style="vertical-align:bottom;text-align:right;"|7.9 |- |style="vertical-align:top;"|Time of rotation on axis, |style="vertical-align:bottom;text-align:right;"|24h. 37m. 22s. |- |style="vertical-align:top;"|Revolution, sidereal, in days, |style="vertical-align:bottom;text-align:right;"|686.97945 |- |style="vertical-align:top;"|Revolution, synodical. |style="vertical-align:bottom;text-align:right;"|779.836 |- |style="vertical-align:top;"|Light and heat from Sun (Earth's = 1), |style="vertical-align:bottom;text-align:right;"|0.43 |- |style="vertical-align:top;"|Polar less than equatorial diameter. |style="vertical-align:bottom;text-align:right;"|1-16th |- |style="vertical-align:top;"|Distance from the Sun, mean, in miles, |style="vertical-align:bottom;text-align:right;"|145,750,000 |- |style="vertical-align:top;"| Distance from the Sun, mean, (Earth's = 1), |style="vertical-align:bottom;text-align:right;"|1.523691 |- |style="vertical-align:top;"| Distance from the Sun,maximum, |style="vertical-align:bottom;text-align:right;"|1.665779 |- |style="vertical-align:top;"| Distance from the Sun,minimum. |style="vertical-align:bottom;text-align:right;"|1.381602 |- |style="vertical-align:top;"|Eccentricity of orbit (semi-axis major = 1) |style="vertical-align:bottom;text-align:right;"|0.93258 |- |style="vertical-align:top;"|Eccentricity of orbit, annual increase, |style="vertical-align:bottom;text-align:right;"|0.00000090176 |- |style="vertical-align:top;"|Longitude of perihelion, |style="vertical-align:bottom;text-align:right;"|332° 23′ 56″.6 |- |style="vertical-align:top;"|Longitude annual increase, |style="vertical-align:bottom;text-align:right;"|15″-8 |- |style="vertical-align:top;"|Longitude ascending node. |style="vertical-align:bottom;text-align:right;"|48° 0′ 3″-5 |- |style="vertical-align:top;"|Inclination of orbit to ecliptic, |style="vertical-align:bottom;text-align:right;"|2″-8 |- |style="vertical-align:top;"|Inclination of orbit to ecliptic, annual decrease. |style="vertical-align:bottom;text-align:right;"|0″.014 |- |style="vertical-align:top;"|Mean daily motion in orbit. |style="vertical-align:bottom;text-align:right;"|31′ 26″-7 |- |style="vertical-align:top;"|Inclination of axis to the ecliptic, |style="vertical-align:bottom;text-align:right;"|59° 41′ 49″ |- |style="vertical-align:top;"|Greatest arc of retrogradation, |style="vertical-align:bottom;text-align:right;"|19° 35′ |- |style="vertical-align:top;"|Edge of south polar spot from pole in winter, |style="vertical-align:bottom;text-align:right;"|35° |- |style="vertical-align:top;"|Edge of south polar spot from pole in summer. |style="vertical-align:bottom;text-align:right;"|5° |- |style="vertical-align:top;"|Brightness of polar spots (mean brightness = 1), |style="vertical-align:bottom;text-align:right;"|2 |}