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 Revised: July 31, 2013             Moon / (Earth)                          301
 
 GEOPHYSICAL DATA (updated 2018-Aug-15):
  Vol. mean radius, km  = 1737.53+-0.03    Mass, x10^22 kg       =    7.349
  Radius (gravity), km  = 1738.0           Surface emissivity    =    0.92
  Radius (IAU), km      = 1737.4           GM, km^3/s^2          = 4902.800066
  Density, g/cm^3       =    3.3437        GM 1-sigma, km^3/s^2  =  +-0.0001  
  V(1,0)                =   +0.21          Surface accel., m/s^2 =    1.62
  Earth/Moon mass ratio = 81.3005690769    Farside crust. thick. = ~80 - 90 km
  Mean crustal density  = 2.97+-.07 g/cm^3 Nearside crust. thick.= 58+-8 km 
  Heat flow, Apollo 15  = 3.1+-.6 mW/m^2   Mean angular diameter = 31'05.2"
  Heat flow, Apollo 17  = 2.2+-.5 mW/m^2   Sid. rot. rate, rad/s = 0.0000026617
  Geometric Albedo      = 0.12             Mean solar day        = 29.5306 d
  Obliquity to orbit    = 6.67 deg         Orbit period          = 27.321582 d
  Semi-major axis, a    = 384400 km        Eccentricity          = 0.05490
  Mean motion, rad/s    = 2.6616995x10^-6  Inclination           = 5.145 deg
  Apsidal period        = 3231.50 d        Nodal period          = 6798.38 d
                                 Perihelion  Aphelion    Mean
  Solar Constant (W/m^2)         1414+-7     1323+-7     1368+-7
  Maximum Planetary IR (W/m^2)   1314        1226        1268
  Minimum Planetary IR (W/m^2)      5.2         5.2         5.2
********************************************************************************


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Ephemeris / WWW_USER Thu Feb 17 18:48:10 2022 Pasadena, USA      / Horizons
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Target body name: Moon (301)                      {source: DE441}
Center body name: Earth-Moon Barycenter (3)       {source: DE441}
Center-site name: BODY CENTER
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Start time      : A.D. 2020-Mar-24 06:00:00.0000 TDB
Stop  time      : A.D. 2020-Mar-25 06:00:00.0000 TDB
Step-size       : 1440 minutes
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Center geodetic : 0.00000000,0.00000000,0.0000000 {E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 0.00000000,0.00000000,0.0000000 {E-lon(deg),Dxy(km),Dz(km)}
Center radii    : (undefined)                                                  
Output units    : AU-D
Output type     : GEOMETRIC cartesian states
Output format   : 2 (position and velocity)
Reference frame : ICRF
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JDTDB
   X     Y     Z
   VX    VY    VZ
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$$SOE
2458932.750000000 = A.D. 2020-Mar-24 06:00:00.0000 TDB 
 X = 2.673075076694347E-03 Y = 1.870517968021612E-04 Z =-1.731476992383482E-04
 VX=-1.967647146277114E-05 VY= 5.085581013947419E-04 VZ= 2.191688329215286E-04
2458933.750000000 = A.D. 2020-Mar-25 06:00:00.0000 TDB 
 X = 2.594706608522828E-03 Y = 6.876749088124335E-04 Z = 4.830079399538465E-05
 VX=-1.364873608592679E-04 VY= 4.889266712527538E-04 VZ= 2.220652448010817E-04
$$EOE
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TIME

  Barycentric Dynamical Time ("TDB" or T_eph) output was requested. This
continuous relativistic coordinate time is equivalent to the relativistic
proper time of a clock at rest in a reference frame comoving with the
solar system barycenter but outside the system's gravity well. It is the
independent variable in the solar system relativistic equations of motion.

  TDB runs at a uniform rate of one SI second per second and is independent
of irregularities in Earth's rotation.

  Calendar dates prior to 1582-Oct-15 are in the Julian calendar system.
Later calendar dates are in the Gregorian system.

REFERENCE FRAME AND COORDINATES

  International Celestial Reference Frame (ICRF)

    The ICRF is an adopted reference frame whose axes are defined relative to 
    fixed extragalactic radio sources distributed across the sky.

    The ICRF was aligned with the prior FK5/J2000 dynamical system at the ~0.02 
    arcsecond level but is not identical and has no associated standard epoch.

  Symbol meaning [1 au= 149597870.700 km, 1 day= 86400.0 s]:

    JDTDB    Julian Day Number, Barycentric Dynamical Time
      X      X-component of position vector (au)
      Y      Y-component of position vector (au)
      Z      Z-component of position vector (au)
      VX     X-component of velocity vector (au/day)                           
      VY     Y-component of velocity vector (au/day)                           
      VZ     Z-component of velocity vector (au/day)                           

ABERRATIONS AND CORRECTIONS

 Geometric state vectors have NO corrections or aberrations applied.

Computations by ...

    Solar System Dynamics Group, Horizons On-Line Ephemeris System
    4800 Oak Grove Drive, Jet Propulsion Laboratory
    Pasadena, CA  91109   USA

    General site: https://ssd.jpl.nasa.gov/
    Mailing list: https://ssd.jpl.nasa.gov/email_list.html
    System news : https://ssd.jpl.nasa.gov/horizons/news.html
    User Guide  : https://ssd.jpl.nasa.gov/horizons/manual.html
    Connect     : browser        https://ssd.jpl.nasa.gov/horizons/app.html#/x
                  API            https://ssd-api.jpl.nasa.gov/doc/horizons.html
                  command-line   telnet ssd.jpl.nasa.gov 6775
                  e-mail/batch   https://ssd.jpl.nasa.gov/ftp/ssd/hrzn_batch.txt
                  scripts        https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS
    Author      : Jon.D.Giorgini@jpl.nasa.gov
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