Revised: May 27, 2003 Mars 499 / 4 GEOPHYSICAL DATA: Mean radius (km) = 3389.9(2+-4) Density (g cm^-3) = 3.933(5+-4) Mass (10^23 kg ) = 6.4185 Flattening, f = 1/154.409 Volume (x10^10 km^3) = 16.318 Semi-major axis = 3397+-4 Sidereal rot. period = 24.622962 hr Rot. Rate (x10^5 s) = 7.088218 Mean solar day = 1.0274907 d Polar gravity ms^-2 = 3.758 Mom. of Inertia = 0.366 Equ. gravity ms^-2 = 3.690 Core radius (km) = ~1700 Potential Love # k2 = 0.153 +-.017 Grav spectral fact u = 14 (x10^5) Topo. spectral fact t = 96 (x10^5) Fig. offset (Rcf-Rcm) = 2.50+-0.07 km Offset (lat./long.) = 62d / 88d GM (km^3 s^-2) = 42828.3 Equatorial Radius, Re = 3394.0 km GM 1-sigma (km^3 s^-2)= +- 0.1 Mass ratio (sun/Mars) = 3098708+-9 Atmos. pressure (bar) = 0.0056 Max. angular diam. = 17.9" Mean Temperature (K) = 210 Visual mag. V(1,0) = -1.52 Geometric albedo = 0.150 Obliquity to orbit = 25.19 deg Mean sidereal orb per = 1.88081578 y Orbit vel. km/s = 24.1309 Mean sidereal orb per = 686.98 d Escape vel. km/s = 5.027 Hill's sphere rad. Rp = 319.8 Mag. mom (gauss Rp^3) = < 1x10^-4 ******************************************************************************* ******************************************************************************* Revised: Apr 03, 2003 Earth 399 PHYSICAL PROPERTIES: Mean radius, km = 6371.01+-0.02 Mass, 10^24 kg = 5.9736 Equ. radius, km = 6378.136 Mass layers: Polar axis, km = 6356.752 Atmos = 5.1 x 10^18 kg Flattening = 1/298.257 oceans = 1.4 x 10^21 kg Density, gm cm^-3 = 5.515 crust = 2.6 x 10^22 kg J2 (GEM T2, 1990) = 0.0010826265 mantle = 4.043 x 10^24 kg gp, m s^-2 (polar) = 9.8321863685 outer core = 1.835 x 10^24 kg ge, m s^-2 (equatorial) = 9.7803267715 inner core = 9.675 x 10^22 kg go, m s^-2 = 9.82022 Fluid core rad = 3480 km GM, km^3 s^-2 = 398600.440 Inner core rad = 1215 km Mean rot. rate, rad s^-1 = 7.292115*10^-5 Surface Area: Sidereal period, hr = 23.93419 land = 1.48 x 10^8 km Mean solar day, days = 1.002738 sea = 3.62 x 10^8 km Moment of inertia = 0.3308 Love no., k2 = 0.299 Mean Temperature, K = 270 Atm. pressure = 1.0 bar Solar constant, W/m^2 = 1367.6 Vis. mag. V(1,0) = -3.86 Volume, 10^10 km^3 = 108.321 Geometric albedo = 0.367 DYNAMICAL CHARACTERISTICS: Obliquity to orbit, deg = 23.45 Sidereal period = 1.0000174 yrs Orbit velocity, km s^-1 = 29.7859 Sidereal period = 365.25636 days Mean daily motion, n = 0.9856474 deg/d Escape velocity = 11.186 km s^-2 Hill's sphere radius = 234.9 Magnetic moment = 0.61 gauss Rp^3 ******************************************************************************* ******************************************************************************* Revised: Mar 11, 1998 Moon / (Earth) 301 PHYSICAL PROPERTIES: Radius, km = 1737.53+-0.03 Mass, 10^20 kg = 734.9 Density, gm cm^-3 = 3.3437 Geometric albedo = 0.12 V(1,0) = +0.21 GM, km^3/s^2 = 4902.798+-.005 Earth/Moon mass ratio = 81.300587 Surface gravity = 1.62 m s^-2 Nearside crust. thick.= 58+-8 km Farside crust. thick. = ~80 - 90 km Heat flow, Apollo 15 = 3.1+-.6 mW/m^2 Heat flow, Apollo 17 = 2.2+-.5 mW/m^2 Mean crustal density = 2.97+-.07g/cm^3 k2 = 0.0302+-.0012 Induced magnetic mom. = 4.23x10^22Gcm^3 Magnetometer moment = 435+-15 DYNAMICAL CHARACTERISTICS: Mean angular diameter = 31'05.2" Orbit period = 27.321582 d Obliquity to orbit = 6.67 deg Eccentricity = 0.05490 Semi-major axis, a = 384400 km Inclination = 5.145 deg Mean motion, rad/s = 2.6616995x10^-6 Nodal period = 6798.38 d Apsidal period = 3231.50 d Mom. of inertia C/MR^2= 0.3935+-.0011 beta (C-A/B), x10^-4 = 6.31(72+-15) gamma (B-A/C), x10^-4 = 2.278(8+-2) *******************************************************************************