Astronomical Constants Index

Constant	Numeric Value	Code*
Earth, Days per Solar Orbit	365.25636053	DO
Earth, Solar Orbits per Day	0.00273780311053	OD
Earth, Solar Orbits per Lunar Orbit	0.0748013300039	OL
Earth, Solar Orbits per Nodal Month	0.0745017026513	ON
Earth, Rotations per Lunar Orbit	27.39646289	RL
Earth, Rotations per Nodal Month	27.2867224663	RN
Earth, Rotations per Solar Orbit	366.25636053	RO
Earth, Rotations per Synodic Month	29.6114378225	R9
Earth, Rotations per Year	366.242154402	RY
Eclipse Year, Days per	346.620063	YE
Eclipse Year, Rotations per	347.569040486	RE
Lunar Nodal Month, Days per	27.2122207637	S2
Lunar Nodal Months per Day	0.0367481951835	ND
Lunar Nodal Months per Solar Orbit	13.4225120288	NO
Lunar Nodal Months per Rotation	0.0366478605569	NR
Lunar Orbit, Days per	27.32166156	S7
Lunar Orbits per Day	0.0366009950677	LD
Lunar Orbits per Solar Orbit	13.3687462502	LO
Lunar Orbits per Rotation	0.0365010623457	LR
Lunar Sidereal Month, Days per	27.32166156	S7
Lunar Synodic Month, Days per	29.5305888844	S9
Nutation Cycle, Lunar Orbits per	248.8268579565	NUO
Nutation Cycle, Years per	18.6133019052	YN
Precession Cycle, Years per	25781.5756912	PR
Year, Eclipse, Days per	346.620063	YE
Year, Rotations per	366.242154403	YR
Year, Tropical, Days per	365.24219264	YT
Years per Day	0.002737909311	YD
Years per Lunar Orbit	0.0748042315774	YL
Years per Nutation	18.6133019052	YN
Years per Orbit	0.999961212611	YO

moon phases

* The code above was originally written for compatability with an HP48 SX.
To load to your HP see the ASTRONOMY DATA PROGRAMMING FILE

FOR MORE ASTRONOMIC AND GEODETIC DATA CHECK OUT THE:

Cosmographic Values Index - - - Astronomy Formulas - - - Geodesy
Did ancient astronomers survey the Earth? - - - - Read the Archaeogeodesy Pages

Your comments, etc. are appreciated and helpful: Contact.
In July 1999 Charlie Sohm noticed a typo.
The "Earth, Orbits per Day" value has since been corrected
to read 0.00273780311053 instead of 0.002737780311053.
In Aug. 2007 John DePompeo pointed out errors in a deleted value and the NUO value.