Astro-Constants
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<?xml version="1.0" encoding="UTF-8"?>
<Collection>
<description>Physical constants for astronomy</description>
<timestamp>Tue Dec 8 15:38:41 2015</timestamp>
<version/>
<link href="http://metacpan.org/pod/Astro::Constants"/>
<items>
<constant>
<name type="long">LIGHT_SPEED</name>
<name type="short">A_c</name>
<description>speed of light in a vacuum</description>
<value system="MKS">2.99792458e8</value>
<value system="CGS">2.99792458e10</value>
<uncertainty type="relative">0</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?c"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">BOLTZMANN</name>
<name type="short">A_k</name>
<description>Boltzmann's constant</description>
<value system="MKS">1.38064852e-23</value>
<value system="CGS">1.38064852e-16</value>
<uncertainty type="relative">5.7e-7</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?k"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">GRAVITATIONAL</name>
<name type="short">A_G</name>
<description>universal gravitational constant</description>
<value system="MKS">6.67408e-11</value>
<value system="CGS">6.67408e-8</value>
<uncertainty type="relative">4.7e-5</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?G"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">ELECTRON_MASS</name>
<name type="short">A_me</name>
<description>mass of electron</description>
<value system="MKS">9.1093897e-31</value>
<value system="CGS">9.1093897e-28</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?me"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">PROTON_MASS</name>
<name type="short">A_mp</name>
<description>mass of proton</description>
<value system="MKS">1.672631e-27</value>
<value system="CGS">1.672631e-24</value>
<uncertainty type="relative">0.000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?mp"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">ATOMIC_MASS_UNIT</name>
<name type="short">A_amu</name>
<description>atomic mass unit</description>
<value system="MKS">1.6605402e-27</value>
<value system="CGS">1.6605402e-24</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?amu"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">ELECTRON_VOLT</name>
<name type="short">A_eV</name>
<description>electron volt</description>
<value system="MKS">1.6021772e-19</value>
<value system="CGS">1.6021772e-12</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?eV"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">PLANCK</name>
<name type="short">A_h</name>
<description>Planck's constant</description>
<value system="MKS">6.6260755e-34</value>
<value system="CGS">6.6260755e-27</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?h"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">HBAR</name>
<name type="short">A_hbar</name>
<description>Planck's constant /2pi</description>
<value system="MKS">1.0545727e-34</value>
<value system="CGS">1.0545727e-27</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?hbar"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">ELECTRON_CHARGE</name>
<name type="short">A_e</name>
<description>electron charge (defined positive)</description>
<value system="MKS">1.602e-19</value>
<value system="CGS">4.8032e-10</value>
<uncertainty type="relative">0.0001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?e"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">NEUTRON_MASS</name>
<name type="short">A_mn</name>
<description>neutron mass</description>
<value system="MKS">1.6749286e-27</value>
<value system="CGS">1.6749286e-24</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?mn"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">HYDROGEN_MASS</name>
<name type="short">A_mH</name>
<description>mass of Hydrogen atom</description>
<value system="MKS">1.6733e-27</value>
<value system="CGS">1.6733e-24</value>
<uncertainty type="relative">0.0001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?mH"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">PARSEC</name>
<name type="short">A_pc</name>
<description>parsec</description>
<value system="MKS">3.08567758e16</value>
<value system="CGS">3.08567758e18</value>
<uncertainty type="relative">0.00000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?pc"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">SOLAR_MASS</name>
<name type="short">A_msun</name>
<description>solar mass</description>
<value system="MKS">1.99e30</value>
<value system="CGS">1.99e33</value>
<uncertainty type="relative">0.01</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?msun"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">SOLAR_RADIUS</name>
<name type="short">A_rsun</name>
<description>solar radius</description>
<value system="MKS">6.96e8</value>
<value system="CGS">6.96e10</value>
<uncertainty type="relative">0.01</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?rsun"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">ASTRONOMICAL_UNIT</name>
<name type="short">A_AU</name>
<description>astronomical unit</description>
<value system="MKS">1.496e11</value>
<value system="CGS">1.496e13</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?AU"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">LIGHT_YEAR</name>
<name type="short">A_ly</name>
<description>light year</description>
<value system="MKS">9.463e15</value>
<value system="CGS">9.463e17</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?ly"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">SOLAR_LUMINOSITY</name>
<name type="short">A_Lsun</name>
<description>solar luminosity</description>
<value system="MKS">3.9e26</value>
<value system="CGS">3.9e33</value>
<uncertainty type="relative">0.1</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?Lsun"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">EARTH_MASS</name>
<name type="short">A_mearth</name>
<description>mass of Earth</description>
<value system="MKS">5.976e24</value>
<value system="CGS">5.976e27</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?mearth"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">EARTH_RADIUS</name>
<name type="short">A_rearth</name>
<description>radius of Earth</description>
<value system="MKS">6.378e6</value>
<value system="CGS">6.378e8</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?rearth"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">ANGSTROM</name>
<name type="short">A_AA</name>
<description>Angstrom</description>
<value system="MKS">1e-10</value>
<value system="CGS">1e-8</value>
<uncertainty type="relative">0.1</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?AA"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">JANSKY</name>
<name type="short">A_Jy</name>
<description>Jansky</description>
<value system="MKS">1e-26</value>
<value system="CGS">1e-23</value>
<uncertainty type="relative">0.1</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?Jy"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">RHO_C</name>
<name type="short">A_rhoc</name>
<description>critical density /h^2</description>
<value system="MKS">1.8791e-26</value>
<value system="CGS">1.8791e-29</value>
<uncertainty type="relative">0.0001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?rhoc"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">STEFAN_BOLTZMANN</name>
<name type="short">A_sigma</name>
<description>Stefan-Boltzmann constant</description>
<value system="MKS">5.67040e-8</value>
<value system="CGS">5.67040e-5</value>
<uncertainty type="relative">0.00001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?sigma"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">A_RAD</name>
<name type="short">A_arad</name>
<description>radiation density constant</description>
<value system="MKS">7.5646e-16</value>
<value system="CGS">7.5646e-15</value>
<uncertainty type="relative">0.0001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?arad"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">THOMSON_XSECTION</name>
<name type="short">A_sigmaT</name>
<description>Thomson cross-section</description>
<value system="MKS">6.6524585e-29</value>
<value system="CGS">6.6524585e-25</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?sigmaT"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">ELECTRON_RADIUS</name>
<name type="short">A_re</name>
<description>classical electron radius</description>
<value system="MKS">2.817941e-15</value>
<value system="CGS">2.817941e-13</value>
<uncertainty type="relative">0.000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?re"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">BOHR_RADIUS</name>
<name type="short">A_a0</name>
<description>Bohr radius</description>
<value system="MKS">5.29177208e-11</value>
<value system="CGS">5.29177208e-9</value>
<uncertainty type="relative">0.00000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?a0"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">WIEN</name>
<name type="short">A_Wien</name>
<description>Wien displacement law constant</description>
<value system="MKS">2.897769e-3</value>
<value system="CGS">2.897769e-1</value>
<uncertainty type="relative">0.000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?Wien"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">ALPHA</name>
<name type="short">A_alpha</name>
<description>fine structure constant</description>
<value>(1.0/137.03599)</value>
<uncertainty type="relative">?</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?alpha"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">AVOGADRO</name>
<name type="short">A_NA</name>
<description>Avogadro's number</description>
<value>6.0221367e23</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?NA"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">YEAR</name>
<name type="short">A_yr</name>
<description>year</description>
<value>3.156e7</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?yr"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">HUBBLE_TIME</name>
<name type="short">A_tH</name>
<description>Hubble time *h</description>
<value>3.0853056e17</value>
<uncertainty type="relative">0.0000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?tH"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">SOLAR_TEMPERATURE</name>
<name type="short">A_Tsun</name>
<description>surface temperature of sun</description>
<value>5780</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?Tsun"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">CMB_TEMPERATURE</name>
<name type="short">A_TCMB</name>
<description>cosmic microwave background temperature</description>
<value>2.726</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?TCMB"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">PI</name>
<name type="short">A_pi</name>
<description>trig constant pi</description>
<value>3.14159265358979324</value>
<uncertainty type="relative">0.00000000000000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?pi"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">EXP</name>
<name type="short">A_exp</name>
<description>base of natural logarithm</description>
<value>2.71828182846</value>
<uncertainty type="relative">0.00000000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?exp"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">SOLAR_DENSITY</name>
<name type="short">A_dsun</name>
<description>mean solar density</description>
<value system="MKS">1408</value>
<value system="CGS">1.408</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?dsun"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">EARTH_DENSITY</name>
<name type="short">A_dearth</name>
<description>mean Earth density</description>
<value system="MKS">5515</value>
<value system="CGS">5.515</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?dearth"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">SOLAR_GRAVITY</name>
<name type="short">A_gsun</name>
<description>solar surface gravity</description>
<value system="MKS">274</value>
<value system="CGS">27400</value>
<uncertainty type="relative">0.0001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?gsun"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">EARTH_GRAVITY</name>
<name type="short">A_gearth</name>
<description>Earth surface gravity</description>
<value system="MKS">9.78</value>
<value system="CGS">978</value>
<uncertainty type="relative">0.01</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?gearth"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">SOLAR_V_MAG</name>
<name type="short">A_Vsun</name>
<description>solar V magnitude</description>
<value>-26.74</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?Vsun"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">SOLAR_V_ABS_MAG</name>
<name type="short">A_MVsun</name>
<description>solar absolute V magnitude</description>
<value>4.83</value>
<uncertainty type="relative">0.01</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?MVsun"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">VACUUM_IMPEDANCE</name>
<name type="short">A_Z0</name>
<description>characteristic impedance of vacuum</description>
<value>376.730313461</value>
<uncertainty type="relative">0.00000000001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?Z0"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">PERMITIV_FREE_SPACE</name>
<name type="short">A_eps0</name>
<description>permittivity of free space</description>
<value system="MKS">8.854187817e-12</value>
<value system="CGS">1</value>
<uncertainty type="relative">0.1</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?eps0"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">PERMEABL_FREE_SPACE</name>
<name type="short">A_mu0</name>
<description>permeability of free space</description>
<value system="MKS">1.256637061e-6</value>
<value system="CGS">1</value>
<uncertainty type="relative">0.1</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?mu0"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">LUNAR_RADIUS</name>
<name type="short">A_rmoon</name>
<description>lunar radius</description>
<value system="MKS">1738e3</value>
<value system="CGS">1738e5</value>
<uncertainty type="relative">0.0001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?rmoon"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">LUNAR_MASS</name>
<name type="short">A_mmoon</name>
<description>lunar mass</description>
<value system="MKS">7.348e22</value>
<value system="CGS">7.348e25</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?mmoon"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">LUNAR_SM_AXIS</name>
<name type="short">A_amoon</name>
<description>lunar orbital semi-major axis</description>
<value system="MKS">3.844e8</value>
<value system="CGS">3.844e10</value>
<uncertainty type="relative">0.001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?amoon"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
<constant>
<name type="long">LUNAR_ECCENTRICITY</name>
<name type="short">A_emoon</name>
<description>lunar orbital eccentricity</description>
<value>0.0549</value>
<uncertainty type="relative">0.0001</uncertainty>
<dimensions/>
<maxValue/>
<minValue/>
<link href="http://physics.nist.gov/cgi-bin/cuu/Value?emoon"/>
<url/>
<categoryList>
<category/>
</categoryList>
</constant>
</items>
</Collection>
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