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%?AST_Const:?Definition?of?astronomical?and?mathematical?constants
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%?Last?modified:???2015/08/12???M.?Mahooti
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%?Mathematical?constants
pi2???????=?2*pi;?????????????????%?2pi
Rad???????=?pi/180;???????????????%?Radians?per?degree
Deg???????=?180/pi;???????????????%?Degrees?per?radian
Arcs??????=?3600*180/pi;??????????%?Arcseconds?per?radian

%?General
MJD_J2000?=?51544.5;??????????????%?Modif.?Julian?Date?of?J2000.0
T_B1950???=?-0.500002108;?????????%?Epoch?B1950
c_light???=?299792457.999999984;??%?Speed?of?light??[m/s];?DE405
AU????????=?149597870691.000015;??%?Astronomical?unit?[m];?DE405

%?Physical?parameters?of?the?Earth?Sun?and?Moon

%?Equatorial?radius?and?flattening
R_Earth???=?6378.13699999999972e3;?%?Earth‘s?radius?[m];?DE405
f_Earth???=?1/298.257223563;???????%?Flattening;?WGS-84???
R_Sun?????=?696000e3;??????????????%?Sun‘s?radius?[m];?DE405
R_Moon????=?1738e3;????????????????%?Moon‘s?radius?[m];?DE405

%?Earth?rotation?（derivative?of?GMST?at?J2000;?differs?from?inertial?period?by?precession）
omega_Earth?=?7.2921158553e-5;???%?[rad/s];?Aoki?1982?NIMA?1997

%?Gravitational?coefficients
GM_Earth????=?398600.4328969391e9;??????????%?[m^3/s^2];?DE405
GM_Sun??????=?132712440017.9870e9;??????????%?[m^3/s^2];?DE405
GM_Moon?????=?GM_Earth/81.3005600000000044;?%?[m^3/s^2];?DE405
GM_Mercury??=?22032.08048641792e9;??????????%?[m^3/s^2];?DE405
GM_Venus????=?324858.5988264596e9;??????????%?[m^3/s^2];?DE405
GM_Mars?????=?42828.31425806710e9;??????????%?[m^3/s^2];?DE405
GM_Jupiter??=?126712767.8577960e9;??????????%?[m^3/s^2];?DE405
GM_Saturn???=?37940626.06113726e9;??????????%?[m^3/s^2];?DE405
GM_Uranus???=?5794549.007071872e9;??????????%?[m^3/s^2];?DE405
GM_Neptune??=?6836534.063879259e9;??????????%?[m^3/s^2];?DE405
GM_Pluto????=?981.6008877070042e9;??????????%?[m^3/s^2];?DE405

%?Solar?radiation?pressure?at?1?AU?
P_Sol???????=?4.560e-6;??????????%?[N/m^2]?（~1367?W/m^2）;?IERS?96

?屬性????????????大小?????日期????時間???名稱
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?????文件????????2120??2016-11-28?21:43??JPL_DE405\AST_Const.m
?????文件?????????987??2016-11-28?03:44??JPL_DE405\Cheb3D.m
?????文件????19264073??2016-11-28?22:37??JPL_DE405\DE405Coeff.mat
?????文件??????948412??2016-11-28?18:25??JPL_DE405\de405iom.pdf
?????文件????????8319??2016-11-28?22:38??JPL_DE405\JPL_Eph_DE405.m
?????文件????????1189??2016-11-05?18:01??JPL_DE405\Mjday.m
?????文件?????????264??2016-11-28?22:41??JPL_DE405\test_JPL405eph.m
?????文件????????1314??2016-11-28?07:19??license.txt