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 Revised: April 12, 2021             Mercury                            199 / 1

 PHYSICAL DATA (updated 2024-Mar-04):
  Vol. Mean Radius (km) =  2439.4+-0.1    Density (g cm^-3)     = 5.427
  Mass x10^23 (kg)      =     3.302       Volume (x10^10 km^3)  = 6.085  
  Sidereal rot. period  =    58.6463 d    Sid. rot. rate (rad/s)= 0.00000124001
  Mean solar day        =   175.9421 d    Core radius (km)      = ~1600 
  Geometric Albedo      =     0.106       Surface emissivity    = 0.77+-0.06
  GM (km^3/s^2)         = 22031.86855     Equatorial radius, Re = 2440.53 km
  GM 1-sigma (km^3/s^2) =                 Mass ratio (Sun/plnt) = 6023682
  Mom. of Inertia       =     0.33        Equ. gravity  m/s^2   = 3.701     
  Atmos. pressure (bar) = < 5x10^-15      Max. angular diam.    = 11.0"   
  Mean Temperature (K)  = 440             Visual mag. V(1,0)    = -0.42 
  Obliquity to orbit[1] =  2.11' +/- 0.1' Hill's sphere rad. Rp = 94.4 
  Sidereal orb. per.    =  0.2408467 y    Mean Orbit vel.  km/s = 47.362 
  Sidereal orb. per.    = 87.969257  d    Escape vel. km/s      =  4.435
                                 Perihelion  Aphelion    Mean
  Solar Constant (W/m^2)         14462       6278        9126
  Maximum Planetary IR (W/m^2)   12700       5500        8000
  Minimum Planetary IR (W/m^2)   6           6           6
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Cannot interpret date. Type "?!" or try YYYY-Mon-Dy {HH:MM} format.

!$$SOF
COMMAND = '199'
START_TIME = '2005-11-4'
STOP_TIME = '2007-6-90'
STEP_SIZE = '1 day'
QUANTITIES = '31'