Astronomical Constants

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mXparser provides a rich collection of built-in math functions, math expressions, and math symbols. Familiarize yourself with the scope and the syntax. Math collection internal help is also available directly from the software – see the tutorial and the API documentation for all the details.

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mXparser – built-in Astronomical Constants

Key word	Category	Description	Example	Since
[ly]	Constant Value	<Astronomical Constant> Light year [m] (m=1)	[ly]	4.0
[au]	Constant Value	<Astronomical Constant> Astronomical unit [m] (m=1)	[au]	4.0
[pc]	Constant Value	<Astronomical Constant> Parsec [m] (m=1)	[pc]	4.0
[kpc]	Constant Value	<Astronomical Constant> Kiloparsec [m] (m=1)	[kpc]	4.0
[Earth-R-eq]	Constant Value	<Astronomical Constant> Earth equatorial radius [m] (m=1)	[Earth-R-eq]	4.0
[Earth-R-po]	Constant Value	<Astronomical Constant> Earth polar radius [m] (m=1)	[Earth-R-po]	4.0
[Earth-R]	Constant Value	<Astronomical Constant> Earth mean radius (m=1)	[Earth-R]	4.0
[Earth-M]	Constant Value	<Astronomical Constant> Earth mass [kg] (kg=1)	[Earth-M]	4.0
[Earth-D]	Constant Value	<Astronomical Constant> Earth-Sun distance – semi major axis [m] (m=1)	[Earth-D]	4.0
[Moon-R]	Constant Value	<Astronomical Constant> Moon mean radius [m] (m=1)	[Moon-R]	4.0
[Moon-M]	Constant Value	<Astronomical Constant> Moon mass [kg] (kg=1)	[Moon-M]	4.0
[Moon-D]	Constant Value	<Astronomical Constant> Moon-Earth distance – semi major axis [m] (m=1)	[Moon-D]	4.0
[Solar-R]	Constant Value	<Astronomical Constant> Solar mean radius [m] (m=1)	[Solar-R]	4.0
[Solar-M]	Constant Value	<Astronomical Constant> Solar mass [kg] (kg=1)	[Solar-M]	4.0
[Mercury-R]	Constant Value	<Astronomical Constant> Mercury mean radius [m] (m=1)	[Mercury-R]	4.0
[Mercury-M]	Constant Value	<Astronomical Constant> Mercury mass [kg] (kg=1)	[Mercury-M]	4.0
[Mercury-D]	Constant Value	<Astronomical Constant> Mercury-Sun distance – semi major axis [m] (m=1)	[Mercury-D]	4.0
[Venus-R]	Constant Value	<Astronomical Constant> Venus mean radius [m] (m=1)	[Venus-R]	4.0
[Venus-M]	Constant Value	<Astronomical Constant> Venus mass [kg] (kg=1)	[Venus-M]	4.0
[Venus-D]	Constant Value	<Astronomical Constant> Venus-Sun distance – semi major axis [m] (m=1)	[Venus-D]	4.0
[Mars-R]	Constant Value	<Astronomical Constant> Mars mean radius [m] (m=1)	[Mars-R]	4.0
[Mars-M]	Constant Value	<Astronomical Constant> Mars mass [kg] (kg=1)	[Mars-M]	4.0
[Mars-D]	Constant Value	<Astronomical Constant> Mars-Sun distance – semi major axis [m] (m=1)	[Mars-D]	4.0
[Jupiter-R]	Constant Value	<Astronomical Constant> Jupiter mean radius [m] (m=1)	[Jupiter-R]	4.0
[Jupiter-M]	Constant Value	<Astronomical Constant> Jupiter mass [kg] (kg=1)	[Jupiter-M]	4.0
[Jupiter-D]	Constant Value	<Astronomical Constant> Jupiter-Sun distance – semi major axis [m] (m=1)	[Jupiter-D]	4.0
[Saturn-R]	Constant Value	<Astronomical Constant> Saturn mean radius [m] (m=1)	[Saturn-R]	4.0
[Saturn-M]	Constant Value	<Astronomical Constant> Saturn mass [kg] (kg=1)	[Saturn-M]	4.0
[Saturn-D]	Constant Value	<Astronomical Constant> Saturn-Sun distance – semi major axis [m] (m=1)	[Saturn-D]	4.0
[Uranus-R]	Constant Value	<Astronomical Constant> Uranus mean radius [m] (m=1)	[Uranus-R]	4.0
[Uranus-M]	Constant Value	<Astronomical Constant> Uranus mass [kg] (kg=1)	[Uranus-M]	4.0
[Uranus-D]	Constant Value	<Astronomical Constant> Uranus-Sun distance – semi major axis [m] (m=1)	[Uranus-D]	4.0
[Neptune-R]	Constant Value	<Astronomical Constant> Neptune mean radius [m] (m=1)	[Neptune-R]	4.0
[Neptune-M]	Constant Value	<Astronomical Constant> Neptune mass [kg] (kg=1)	[Neptune-M]	4.0
[Neptune-D]	Constant Value	<Astronomical Constant> Neptune-Sun distance – semi major axis [m] (m=1)	[Neptune-D]	4.0