Planetary Satellites

								Orbital Eccentricity	Orbital Inclination °	Radius (km)	Mass B Mass of Planet	Mean Density (g/cm^3)	Discoverer	Visible Magnitude at Mean Opposition Distance
Satellite			Semimajor Axis of Orbit (km)		Sidereal Rev Period (d h m)
Satellites of the Earth
The Moon			384,400		27	07	43	0.055	18-29	1738	0.01230002	3.34	¾	-12.7
Satellites of Mars
1		Phobos	9,378		0	07	39	0.015	1.0	13x11x9	1.5x10^-8	1.95	Hall (1877)	11.8
2		Deimos	23,459		1	06	18	0.0005	0.9-2.7	8x6x5	3x10^-9	2	Hall (1877)	12.9
Satellites of Jupiter
XVI		Metis	128,000		0	07	04			20	0.5x10^-10		Synnott/Voyager 2 (1980)	17.5
XV		Adrastea	129,000		0	07	06			13x10x8	0.1x10^-10		Jewett/Danielson (1979)	19.1
V		Amalthea	181,000		0	11	57	0.003	0.4	131x73x67	38x10^-10		Barnard (1892)	14.1
XIV		Thebe	222,000		0	16	11	0.015	0.8	55x45	4x10^-10		Synnott/Voyager 2 (1980)	15.6
I		Io	422,000		1	18	28	0.004	0.0	1830x1819x1813	4.68x10^-5	3.5	Galileo (1610)	5.0
II		Europa	671,000		3	13	14	0.009	0.5	1565	2.52x10^-5	3.0	Galileo (1610)	5.3
III		Ganymede	1,070,000		7	03	43	0.002	0.2	2634	7.80x10^-5	1.9	Galileo (1610)	4.6
IV		Callisto	1,883,000		16	16	32	0.007	0.5	2403	5.66x10^-5	1.8	Galileo (1610)	5.7
XIII		Leda	11,094,000		240			0.148	26.1	5	0.03x10^-10		Kowal (1974)	20
VI		Himalia	11,480,000		251			0.158	27.6	85	50x10^-10		Perrine (1904)	14.8
X		Lysithea	11,720,000		260			0.107	29.0	12	0.4x10^-10		Nicholson (1938)	18.4
VII		Elara	11,737,000		260			0.207	24.8	40	4x10^-10		Perrine (1905)	16.8
XII		Ananke	21,200,000		671R			0.169	147	10	0.2x10^-10		Nicholson (1951)	18.9
XI		Carme	22,600,000		692R			0.207	164	15	0.5x10^-10		Nicholson (1938)	18.0
VIII		Pasiphae	23,500,000		735R			0.378	145	18	1x10^-10		Melotte (1908)	17.0
IX		Sinope	23,700,000		758R			0.275	153	14	0.4x10^-10		Nicholson (1914)	18.3
—													Kowal (1975)	20
Satellites of Saturn
18	Pan		133,583			13	48			10	8x10^-12		Showalter/Voyager 2 (1990)
15	Atlas		137,670			14	27	0.000	0.3	20x10			Terrile/Voyager 1	18
16	Prometheus		139,353			14	43	0.003	0.0	70x50x40			Collins/Voyager 1	16
17	Pandora		141,700			15	05	0.004	0.0	55x45x35			Collins/Voyager 1	16
11	Epimetheus		151,422			16	40	0.009	0.3	70x60x50			Fountain, Larson/ Reitsema /Smith	15
10	Janus		151,472			16	40	0.007	0.1	110x100x80			Dollfus (1966/80)	14
1	Mimas		185,520			22	37	0.0202	1.5	209x196x191	8x10^-8	1.2	W. Herschel (1789)	12.9
2	Enceladus		238,020		1^h	08^m	32^s	0.00452	0.0	256x247x245	1.3x10^-7	1.1	W. Herschel (1789)	11.7
3	Tethys		294,660		1^h	22^m	15^s	0.00000	1.9	528x526	1.3x10^-6	1.0	Cassini (1684)	10.2
13	Telesto		294,660		1^h	22^m	15^s			15x13x8			Smith, Reitsema, Larson, Fountain (1980)	19
14	Calypso		294,660		1^h	22^m	15^s			15x8x8			Pascu, Seidelmann, Baum, Currie (1980)	19
4	Dione		377,400		2^h	17^m	36^s	0.002230	0.02	560	1.96x10^-6	1.4	Cassini (1684)	10.4
12	Helene		377,400		2^h	17^m	45^s	0.005	0.0	18x16x15			Laques and Lecacheux (1980)	18
5	Rhea		527,040		4^h	12^m	16^s	0.00100	0.4	764	4.4x10^-6	1.3	Cassini (1672)	9.7
6	Titan		1,221,830		15^h	21^m	51^s	0.029192	0.3	2575	2.4x10^-4	1.9	Huygens (1665)	8.3
7	Hyperion		1,481,100		21^h	06^m	45^s	0.104	0.4	180x140x113	3x10^-8	1.9	Bond, Bond, Lassell (1848)	14.2
8	Iapetus		3,561,300		79^h	03^m	43^s	0.02828	14.7	718	3.3x10^-6	1.2	Cassini (1671)	11.1
9	Phoebe		12,952,000		549^h	03^m	33^s	0.16326	177	110	7x10^-10		W. Pickering (1898)	16.5
Satellites of Uranus
6	Cordelia		49,770			08	02	<0.001	0.1	13			Terrile/Voyager 2 (1986)
7	Ophelia		53,790			09	02	0.010	0.1	15			Terrile/Voyager 2 (1986)
8	Bianca		59,170			10	25	<0.001	0.2	21			Voyager 2 (1986)
9	Cressida		61,780			11	07	<0.001	0.0	31			Synnott/Voyager 2 (1986)
10	Desdemona		62,680			11	22	<0.001	0.2	27			Synnott/Voyager 2 (1986)
11	Juliet		64,350			11	50	<0.001	0.1	42			Synnott/Voyager 2 (1986)
12	Portia		66,090			12	19	<0.001	0.1	54			Synnott/Voyager 2 (1986)
13	Rosalind		69,940			11	54	<0.001	0.3	27			Synnott/Voyager 2 (1986)
14	Belinda		75,260			14	57	<0.001	0.0	33			Synnott/Voyager 2 (1986)
15	Puck		86,010			18	17	<0.001	0.3	77			Synnott/Voyager 2 (1986)
5	Miranda		129,390		1	09	56	0.0027	4.2	240x234x233	0.2x10^-5	1.26	Kuiper (1948)	16.3
1	Ariel		191,020		2	12	29	0.0034	0.3	581x578x578	1.6x10^-5	1.65	Lassell (1851)	14.2
2	Umbriel		266,300		4	03	27	0.0050	0.4	585	1.4x10^-5	1.44	Lassell (1851)	14.8
3	Titania		433,910		8	16	56	0.0022	0.1	789	4.1x10^-5	1.59	W. Herschel (1787)	13.7
4	Oberon		583,520		13	11	07	0.0008	0.1	761	3.5x10^-5	1.50	W. Herschel (1787)	13.9
16	Caliban		7,169,000					0.082	139.7	30			Gladman	22.4
17	Sycorax		12,214,000			1,289		140.509	152.7	60			Nicholson, Burns, Kavelaars (1997)	20.09
Four Reported discoveries awaiting confirmation
Satellites of Neptune
3	Naiad		48,230			7		<0.001	4.74	29			Voyager 2 (1989)	24.7
4	Thalassa		50,070			7	30	<0.001	0.21	40			Synnott/Voyager 2 (1989)	23.0
5	Despina		52,530			8		<0.001	0.07	74			Synnott/Voyager 2 (1989)	22.6
6	Galatea		61,950			10		<0.001	0.05	79			Synnott/Voyager 2 (1989)	22.3
7	Larissa		73,550			13		0.0014	0.20	104 x 89			Reitsema, Hubbard, Lebofsky, Tholen /Voyager 2 (1989)	22.0
8	Proteus		117,650			27		0.0004	0.05	218 x 208 x 201			Synnott/Voyager 2 (1989)	20.03
1	Triton		354,760		5	21	03^mR	0.000016	157,345	1353	2.09 x 10^-4	2.07	Lassell (1846)	13.5
2	Nereid		5,513,400		360	5		0.75	27.6	170	2 x 10^-7	2.03	Kuiper (1949)	18.7
+4 reported discoveries awaiting confirmation
Rings and Ring Arcs of Neptune
	Galle			41,900
	Leverrier			53,200
	Lassell			53,200-57,500
	Arago			57,500
	Adams			62,900
	Courage			62,900
	Liberté			62,900
	Egalité			62,900
	Fraternité			62,900
Satellite of Pluto
	Charon			19,682	6	9	17 R	<0.001	99	593	0.124		Christy (1978)	16.8
Based on a table by Joseph Veverka in the Observer’s Handbook of the Royal Astronomical Society of Canada and on the Astronomical Almanac 2001. Many of Veverka’s values are from J. Burns. Density is average of Pluto and Charon. Inclinations greater than 90º are retrograde; R signifies retrograde revolution. Discoverers from Burns and Matthews, Satellites (1986), updated with correspondence with D. Pascu, R. Synnott, H. Reitsema, and R. Terrile (1994).