Planetary Data

Physical

NameRadius
[km]
SMA
[AU]
Mass
[x1023kg]
Density
[g cm³]
Gravity
[m s²]
Esc Vel
[km/s]
Orb Period
[years]
Orb Incl
[°]
Ecl Incl
[°]
Orb EccOrb Vel
[km/s]
Rotation
[days]
FlatteningTemp
[°K]
AlbedoSolar
[W m²]
Mercury24400.38713.3025.4273.7014.4350.2408472.117.004970.2056447.36258.646203400.1069121
Venus6051.890.723348.6855.2048.8710.3610.615197177.33.394680.0067735.0214-243.01807350.652635
Earth6378.14159.72195.5159.780311.1861.0000223.4500.0016729.78590.9972580.003352700.3671366
Mars33941.52376.41853.9333.715.0271.8808225.191.849690.0933924.13091.025960.006482100.15591
Jupiter714925.202918981.31.32624.7959.511.86263.121.304390.0483813.06970.4135420.064871500.5250.5
Saturn602689.53675683.190.68710.4435.529.447526.732.485990.053869.66240.4440090.097961340.4715.04
Uranus2555919.1892868.1031.3188.8721.384.016897.860.772640.047266.8352-0.7180.02293760.513.71
Neptune2476630.06991024.11.63811.523.5164.79129.561.770040.008595.47780.671250.0171720.411.47

 

Data courtesy NASA/JPL/Caltech Horizons Web Interface.

Reference

ParameterExplanationUnit
Radiussemi-diameter of a planet on its equatorkilometers
SMAsemi-major axis, the mean distance from the sunastronomical unit *
Massplanetary mass excluding natural satellitesx1023kg
Densitymean planetary densityg cm³
Gravitymean gravity on equatorm s²
Esc Velescape velocity on equatorkm/s
Orb Periodduration of one orbit around the sun.years
Orb Inclinclination of the rotation axis to the orbital planedegrees
Ecl Inclinclination of the orbital plane to the eclipticdegrees
Orb Ecceccentricity of the orbitunitless
Orb Velmean orbit velocitykm/s
Rotationduration of one axial rotation, negative for retrograde motiondays
Flatteningthe ratio of equatorial and polar radiiunitless
Tempaverage planetary temperature, day against nightdegree Kelvin
Albedothe ratio of amount of light reflected back into spaceunitless or percent
Solarmean solar insulation, the amount of solar energy receivedW m²

* astronomical unit (149.6 million km)

 

Ephemerides

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Data courtesy NASA/JPL/Caltech Horizons Web Interface.

Click on the date to show the position of the planet on a star chart. The star chart plots a planet with its current position.

Reference

ParameterExplanationUnit
DateUTC Date
TimeUTC Time
R.A.Right ascension coordinate, range: 0 to 24 hoursHOUR MIN SEC
Decl.Declination coordinate, range: -90° to +90°DEG MIN SEC
Constthe ecliptical constellion in which the object resides
Magvisual apparent magnitude (brightness)
Distancecenter-to-center distance to EarthAU *
Sizeapparent diameter at given distance from eartharc seconds
Radialthe radial velocity by which an object is moving towards Earth (negative) or away.km/s
Elongationangular distance from the sundegrees
L/Tleading the sun (morning sky) or trailing the sun (evening sky)
Phasephase, angle of illuminationdegrees

* astronomical unit (149.6 million km)