Planetary Data

Quantity	Mercury	Venus	Earth	Mars	Jupiter	Saturn	Uranus	Neptune	Pluto
Mean distance from sun (10⁶ km)	57.9	108	150	228	778	1,430	2,870	4,500	5,900
Period of revolution, years	0.241	0.615	1.00	1.88	11.9	29.5	84.0	165	248
Orbital speed, km/s	47.9	35.0	29.8	24.1	13.1	9.64	6.81	5.43	4.74
Inclination of axis to orbit	<28	3	23.5	24	3.08	26.7	82.1	28.8	?
Inclination of orbit to earth's orbit	7	3.39	...	1.85	1.30	2.49	0.77	1.77	17.2
Eccentricity of orbit	0.206	0.0068	0.0167	0.0934	0.0485	0.0556	0.0472	0.0086	0.250
Equatorial diameter, km	4,880	12,100	12,800	6,790	143,000	120,000	51,800	49,500	3000?
Mass(earth=1)	0.0558	0.815	1.000	0.107	318	95.1	14.5	17.2	0.01?
Density (water = 1)	5.60	5.20	5.52	3.95	1.31	0.704	1.21	1.67	?
Escape velocity, equator, km/s	4.3	10.3	11.2	5.0	59.5	35.6	21.2	23.6	0.9?
Satellites	0	0	1	2	16*	17*	15*	2*	1
Orbit speed, km/hr	172.7	126.3	107.4	87	47.2	34.8	24.5	19.6	17.1
High/Low temperatures, °C	350	480	58	27	...	...	...	...	-234
High/Low temperatures, °C	-170	-33	-88	-123	...	...	...	...	-390
Atmosphere	none	CO2	N2,O2	CO2	H2,He	H2,He	H2,He	H2,He	none
Orbit in AU	0.387	0.723	1.000	1.524	5.203	9.539	19.18	36.06	39.44

Note: Some numbers taken from Halliday & Resnick. Some from an excellent display chart published by Hansen Planetarium, Salt Lake City, UT.

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