a

1.0

anomalistic lunar period, constant

ya

365.2596 44379935

anomalistic period, days, var

ad

0.036291651542877

anomalistic periods per day, var

al

0.991548193326122

anomalistic periods per lunar orbit

am

1.07171380955211

anomalistic periods per moon

an

0.987576433664042

anomalistic periods per nodal period

ar

0.0361925634301399

anomalistic periods per rotation, var

aw

0.005116660

axis wobble, earth nutation, degrees

tz

1.38461538461538

circumference / 260, degrees

cir

360.0

circumference, degrees

d

1.0

day, days per day, constant

de

346.620062999316

days per eclipse nodal period, var

da

27.55454650

days per lunar anomalistic period

dn

27.2122207637

days per lunar nodal period, var

dl

27.3216607999956

days per lunar orbit, var

dm

29.530587999996

days per moon, var

do

365.2563 60529998

days per orbit, var

dp

9,412,719.08674307

days per precession cycle, var

dr

0.997269671989988

days per rotation, var

dy

365.2421 92640131

days per year, var

cem

24,901.4726094

earth circumference, equatorial, miles

cd

111,950.42769

earth circumference, mean degree, meters

cdm

69.0933962964

earth circumference, mean degree, miles

cmm

24,873.492365

earth circumference, mean, miles

dmm

7,917.52127325

earth diameter, mean, miles

fr

0.99664718931882

earth flattening reciprocal, IUGG

fi

298.2572 22101

earth flattening, inverse, IUGG

fw

298.2572 23563

earth flattening, inverse, WGS84

fl

0.00335281068118

earth flattening, IUGG

era

0.0

earth rotation angle, reserved term

ear

3,958.76063662

earth, average radius, miles

ce

40,075,035.5351344

earth, circumference, equatorial, meters, IAU-based

cw

40,075,016.6855784

earth, circumference, equatorial, meters, IUGG-based, WGS84

cm

40,030,005.697

earth, circumference, mean, meters

ed

12,756,280.0

earth, diameter, equatorial, meters, IUGG, WGS84

eo

0.01671022

earth, eccentricity of orbit

emq

10,001,965.7293

earth, meridian quadrant, meters, IUGG

ers

6,371,007.181

earth, radius of a sphere with the same surface, meters, IUGG

erv

6,371,000.79

earth, radius of a sphere with the same volume, meters, IUGG

rcp

6,399,593.6259

earth, radius of curvature, polar, meters

er

6,378,140.0

earth, radius, equatorial, meters, IAU 1979

erm

6,371,008.7714

earth, radius, mean, meters, IUGG

rmm

3,958.73926185

earth, radius, mean, miles

rw

6,378,137.0

earth, semi-major axis, meters, IUGG constant, WGS84

smi

6,356,752.3141

earth, semi-minor axis, meters, IUGG derived, WGS84

smr

6,356,755.28816

earth, semi-minor radius, meters

es

19.6133417436646

eclipse nodal periods per lunar standstill period, var

ft

0.30480

english foot, meters

fm

3.28083989501312

feet per meter

gm

1,855.32571922

geographic mile, meters

il

5.1453964

inclination of lunar orbit, degrees from mean ecliptic

jc

36525.0

julian century, days

jd

8640.0

julian day, seconds

le

521,854.0097

linear eccentricity, meters

ye1

346.6200 31

lunar eclipse nodal period, days, 0.5 1900 ET

nd

0.0367481951834655

lunar nodal period per day, var

nr

0.0366478605568387

lunar nodal period per rotation, var

np

345900.43820677

lunar nodal periods per precession cycle, var

no

13.4225120287586

lunar nodal periods per solar orbit, var

c27

13.1763585909118

lunar orbit per day, mean, degrees, var

ld

0.0366009960858661

lunar orbit per day, var

r27

13.1403828099811

lunar orbit per rotation, degrees, var

lr

0.0365010633610585

lunar orbit per rotation, var

ln

248.8273 97447861

lunar orbits per eclipse nodal period, var

lp

344514.889574347

lunar orbits per precession cycle, var

lo

13.3687466220961

lunar orbits per solar orbit, var

ly

13.3682280632146

lunar orbits per year, var

sp

1384.55370262605

lunar standstill periods per precesion cycle, var

myf

2.720

megalithic yard, feet

mw

0.518102946

moon angular width, geocentric mean, degrees

me

0.054900489

moon eccentricity of orbit

k

0.2725076

moon radius, earth radius units

mrm

1,737,970.0

moon radius, meters

ma

406,720,000.0

moon, distance, apogee, meters

md

384,400,000.0

moon, distance, mean, meters

mp

356,375,000.0

moon, distance, perigee, meters

m

1.0

moon, lunar synodic period, phase cycle, constant

mo

12.3687466220961

moons per orbit, var

mr

0.0337707353510468

moons per rotation, vars

ms

230.2147 77695117

moons per standstill, var

my

12.3682668521075

moons per year, var

ob

23.439291111

obliquity of the ecliptic, degrees, var

od

0.002737803

orbit per day, vars

on

0.0745017026512947

orbit per lunar nodal period, var

ol

0.0748013279230814

orbit per lunar orbit, var

om

0.0808489356725565

orbit per moon, var

si

0.982918083604216

orbit per rotation (sinos), degrees, var

or

0.00273032801001171

orbit per rotation, var

o

1.0

orbit, solar orbits, constant

oer

18.6873200440297

orbit-eclipse nodal period difference, rotations, var

oe

18.6362975306814

orbit-eclipse nodal period differential, days, var

os

18.6140637625912

orbits per lunar standstill period, var

op

25770.1712294349

orbits per precession cycle, var

oy

1.00003879039758

orbits per year, var

pi

3.14159265358979

pi to 14 decimals

pf

0.00335281066474748

polar flattening, WGS84

pn

0.0000028910053

precession cycle per lunar nodal period, var

pl

0.00000290263216558075

precession cycle per lunar orbit, var

po

0.0000388045539587953

precession cycle per orbit, var

py

0.000038803048223817

precession cycle per year, var

p

1.0

precession of earth axis, revolution, constant

rad

57.2957795130824

radian, degrees

r

1.0

rotation, earth rotations, constant

rd

1.00273780311053

rotations per day, var

re

347.5690 40485968

rotations per eclipse nodal period, var

ra

27.6299854231

rotations per lunar anomalistic period, var

rn

27.2867224663513

rotations per lunar nodal period, var

rl

27.3964621279187

rotations per lunar orbit, var

rm

29.6114369321544

rotations per moon, var

ro

366.2563 6053

rotations per orbit, var

rp

9438489.12472768

rotations per precession, var

ry

366.2421 53851238

rotations per year, var

rc

0.5234752

royal cubit, Petrie, meters

so

0.985609119790904

solar orbit per day (sonos), degrees, var

s25

27.1580123221

solar orbit per lunar anomalistic period, degrees, var

s22

26.8206129544661

solar orbit per lunar nodal period, degrees, var

s27

26.9284780523093

solar orbit per lunar orbit, degrees, var

s29

29.1056168421203

solar orbit per lunar synodic period, degrees, var

sm

0.00434376980492687

standstill per moon

au

149,597,870,000.0

sun, distance, meters (astronomic unit)

r2

114.5915 59026165

two radians, degrees

sf

3.2808333

U. S. survey feet per meter

ae

1.0

unity, absolute equality, reserved term

vd

583.9216 60

venus, days per synodic period

yg

365.2425

year, gregorian, days

yj

365.25

year, julian, days

y

1.0

year, years per year, constant

yer

18.6731133652703

year-eclipse nodal period difference, rotations, var

ye

18.622129640815

year-eclipse nodal period differential, days, var

yd

0.00273790931100145

years per day, var

yl

0.0748042294963313

years per lunar orbit, var

ys

18.6133417436646

years per lunar standstill period, var

ym

0.0808520718349153

years per moon, var

yp

25771.1712294349

years per precession cycle, var

yr

0.00273043392052075

years per rotation, var

yo

0.999961211107054

years per solar orbit, var

Astronomical
Constants

Geodesy
Page