neptune.txt

一个关于星球运动的Java3d例子

name=海王星
orbitdata=neptune.orbit.txt
orbitperiod=59799.900
texture=images/neptune.jpg
radius=24624
radiusscale=2000
orbitcolor=0.5,0.5,1
#EOF
PHYSICAL DATA:
  Mass (10^24 kg)       =   102.43        Density (g/cm^3)       =  1.638
  Equat. radius (1 bar) = 24766+-15 km    Polar radius (km)      = 24342+-30
  Volumetric mean radius= 24624+-21 km    Flattening             =  0.0171

  Rotation period       = 16.11+-0.01 hr  Rot. rate(10^-4 rad/s) =  1.083
  m = w^2a^3/GM         =  0.02609        Hydrostatic flat., fh  =  0.01804
  Inferred rot. period  = 16.7+-1.4 hr    ks = 3*J2/m            =  0.407
  Mom. of inert. I/MRo^2=                 I/MRo^2 (upper bound)  =  0.239
  Rocky core mass (Mc/M)=                 Y factor (He/H ratio)  =  0.235+-.040

  GM (km^3/s^2)         = 6,835,107       GM 1-sigma (km^3/s^2)  = +-15
  Equ. grav, ge (m/s^2) = 11.00+-0.05     Pol. grav, gp (m/s^2)  = 11.41+-0.03

  Geometric albedo      =  0.41           Visual magnitude V(1,0)= -6.87
  Vis. mag. (opposition)= +7.84           Obliquity to orbit     = 29.56 deg
  Sidereal orbit period = 163.72321 yr    Sidereal orbit period  = 59799.900 d
  Mean daily motion     = 0.0060200 deg/d Mean orbit velocity    =

  Planetary Solar Const =   1.47 W/m^2    Dipole tilt/offset     = 47deg/0.55Rp
  Escape velocity (km/s)=  23.5           Mag.dip.mom(gauss-Rp^3)= 0.133
  Aroche(ice)/Rp        =  2.98           Hill's sphere rad., Rp = 4700