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116 lines
5.9 KiB
Plaintext
116 lines
5.9 KiB
Plaintext
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Revised: July 31, 2013 Moon / (Earth) 301
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GEOPHYSICAL DATA (updated 2018-Aug-15):
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Vol. mean radius, km = 1737.53+-0.03 Mass, x10^22 kg = 7.349
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Radius (gravity), km = 1738.0 Surface emissivity = 0.92
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Radius (IAU), km = 1737.4 GM, km^3/s^2 = 4902.800066
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Density, g/cm^3 = 3.3437 GM 1-sigma, km^3/s^2 = +-0.0001
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V(1,0) = +0.21 Surface accel., m/s^2 = 1.62
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Earth/Moon mass ratio = 81.3005690769 Farside crust. thick. = ~80 - 90 km
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Mean crustal density = 2.97+-.07 g/cm^3 Nearside crust. thick.= 58+-8 km
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Heat flow, Apollo 15 = 3.1+-.6 mW/m^2 Mean angular diameter = 31'05.2"
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Heat flow, Apollo 17 = 2.2+-.5 mW/m^2 Sid. rot. rate, rad/s = 0.0000026617
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Geometric Albedo = 0.12 Mean solar day = 29.5306 d
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Obliquity to orbit = 6.67 deg Orbit period = 27.321582 d
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Semi-major axis, a = 384400 km Eccentricity = 0.05490
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Mean motion, rad/s = 2.6616995x10^-6 Inclination = 5.145 deg
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Apsidal period = 3231.50 d Nodal period = 6798.38 d
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Perihelion Aphelion Mean
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Solar Constant (W/m^2) 1414+-7 1323+-7 1368+-7
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Maximum Planetary IR (W/m^2) 1314 1226 1268
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Minimum Planetary IR (W/m^2) 5.2 5.2 5.2
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********************************************************************************
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Ephemeris / WWW_USER Thu Feb 17 18:30:56 2022 Pasadena, USA / Horizons
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Target body name: Moon (301) {source: DE441}
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Center body name: Earth (399) {source: DE441}
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Center-site name: BODY CENTER
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Start time : A.D. 2020-Mar-24 06:00:00.0000 TDB
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Stop time : A.D. 2020-Mar-25 06:00:00.0000 TDB
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Step-size : 1440 minutes
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Center geodetic : 0.00000000,0.00000000,0.0000000 {E-lon(deg),Lat(deg),Alt(km)}
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Center cylindric: 0.00000000,0.00000000,0.0000000 {E-lon(deg),Dxy(km),Dz(km)}
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Center radii : 6378.1 x 6378.1 x 6356.8 km {Equator, meridian, pole}
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Output units : AU-D
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Output type : GEOMETRIC cartesian states
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Output format : 2 (position and velocity)
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EOP file : eop.220216.p220512
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EOP coverage : DATA-BASED 1962-JAN-20 TO 2022-FEB-16. PREDICTS-> 2022-MAY-11
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Reference frame : ICRF
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JDTDB
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X Y Z
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VX VY VZ
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*******************************************************************************
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$$SOE
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2458932.750000000 = A.D. 2020-Mar-24 06:00:00.0000 TDB
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X = 2.705953999132032E-03 Y = 1.893525408300819E-04 Z =-1.752774223513111E-04
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VX=-1.991849279045934E-05 VY= 5.148133848757774E-04 VZ= 2.218646176831359E-04
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2458933.750000000 = A.D. 2020-Mar-25 06:00:00.0000 TDB
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X = 2.626621595899715E-03 Y = 6.961333356580973E-04 Z = 4.889489555029374E-05
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VX=-1.381661604524936E-04 VY= 4.949404874160148E-04 VZ= 2.247966555360729E-04
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$$EOE
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TIME
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Barycentric Dynamical Time ("TDB" or T_eph) output was requested. This
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continuous relativistic coordinate time is equivalent to the relativistic
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proper time of a clock at rest in a reference frame comoving with the
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solar system barycenter but outside the system's gravity well. It is the
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independent variable in the solar system relativistic equations of motion.
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TDB runs at a uniform rate of one SI second per second and is independent
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of irregularities in Earth's rotation.
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Calendar dates prior to 1582-Oct-15 are in the Julian calendar system.
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Later calendar dates are in the Gregorian system.
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REFERENCE FRAME AND COORDINATES
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International Celestial Reference Frame (ICRF)
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The ICRF is an adopted reference frame whose axes are defined relative to
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fixed extragalactic radio sources distributed across the sky.
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The ICRF was aligned with the prior FK5/J2000 dynamical system at the ~0.02
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arcsecond level but is not identical and has no associated standard epoch.
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Symbol meaning [1 au= 149597870.700 km, 1 day= 86400.0 s]:
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JDTDB Julian Day Number, Barycentric Dynamical Time
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X X-component of position vector (au)
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Y Y-component of position vector (au)
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Z Z-component of position vector (au)
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VX X-component of velocity vector (au/day)
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VY Y-component of velocity vector (au/day)
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VZ Z-component of velocity vector (au/day)
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ABERRATIONS AND CORRECTIONS
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Geometric state vectors have NO corrections or aberrations applied.
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Computations by ...
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Solar System Dynamics Group, Horizons On-Line Ephemeris System
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4800 Oak Grove Drive, Jet Propulsion Laboratory
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Pasadena, CA 91109 USA
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General site: https://ssd.jpl.nasa.gov/
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Mailing list: https://ssd.jpl.nasa.gov/email_list.html
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System news : https://ssd.jpl.nasa.gov/horizons/news.html
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User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html
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Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x
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API https://ssd-api.jpl.nasa.gov/doc/horizons.html
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command-line telnet ssd.jpl.nasa.gov 6775
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e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/hrzn_batch.txt
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scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS
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Author : Jon.D.Giorgini@jpl.nasa.gov
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*******************************************************************************
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