compiled by Wm. Robert Johnston
last updated 13 November 2021

object	id	semimajor axis		orbital period		orbital eccentricity	orbit inclin.
		(km)	(AU)	(days)	(years)		(°)
Sun	*	N/A	N/A	N/A	N/A	N/A	N/A
Mercury	P	57,909,100	0.387098	87.96917	0.240842	0.20564	7.0056
Venus	P	108,207,300	0.723321	224.69556	0.615172	0.00676	3.3978
Earth	P	149,597,900	1.000000	365.25596	1.000000	0.01673	0.0005
I Moon	S	384,400	0.002570	27.322	0.074802	0.0554	23.43
Mars	P	227,944,100	1.523712	686.99919	1.880851	0.09337	1.8518
(1) Ceres	D/A	413,951,700	2.767096	1,681.25	4.602951	0.11620	9.6474
Jupiter	P	778,280,000	5.202480	4,332.171	11.866308	0.04854	1.2986
I Io	S	421,800	0.002820	1.769	0.004843	0.0041	0.036
II Europa	S	671,100	0.004486	3.551	0.009722	0.0094	0.466
III Ganymede	S	1,070,400	0.007155	7.155	0.019589	0.0013	0.177
IV Callisto	S	1,882,700	0.012585	16.69	0.045694	0.0074	0.192
Saturn	P	1,426,698,000	9.541499	10,758.53	29.473039	0.05551	2.4942
III Tethys	S	294,672	0.001970	1.888	0.005169	0.0001	1.091
IV Dione	S	377,415	0.002525	2.737	0.007493	0.0022	0.028
V Rhea	S	527,068	0.003523	4.518	0.012369	0.001	0.333
VI Titan	S	1,221,865	0.008168	15.95	0.043668	0.0288	0.306
VIII Iapetus	S	3,560,854	0.023803	79.33	0.217190	0.0293	8.298
Uranus	P	2,870,480,900	19.187979	30,680.49	84.05119	0.04686	0.7730
I Ariel	S	190,900	0.001276	2.5205	0.006901	0.0012	0.02
II Umbriel	S	266,000	0.001778	4.1444	0.011347	0.0039	0.08
III Titania	S	436,300	0.002916	8.7062	0.023836	0.0012	0.11
IV Oberon	S	583,500	0.003900	13.4643	0.036863	0.0014	0.15
Neptune	P	4,498,337,300	30.069528	60,186.23	164.88833	0.00895	1.7701
I Triton	S	354,759	0.0023714	5.8769	0.016090	0.00034	156.904
(90482) Orcus	T	5,902,200,000	39.454	90,517	247.82	0.254	21.186
(134340) Pluto	D/T	5,902,400,000	39.455	90,521	247.83	0.242	16.086
I Charon	S	19,573	0.0001308	6.38723	0.017487	0.0000	0.000
(208996) 2003 AZ84	T	5,902,500,000	39.456	90,524	247.84	0.169	15.567
(307261) 2002 MS4	T	6,247,000,000	41.76	98,568	269.9	0.154	18.67
(24835) 1995 SM55	T	6,259,800,000	41.844	98,865	270.68	0.101	26.792
(120347) Salacia	T	6,297,800,000	42.098	99,767	273.14	0.104	25.573
(136108) Haumea	D/T	6,451,900,000	43.128	103,451	283.23	0.205	26.51
(50000) Quaoar	T	6,524,900,000	43.616	105,212	288.05	0.042	7.99
(136472) Makemake	D?/T	6,815,400,000	45.558	112,316	307.50	0.157	27.570
(174567) Varda	T	6,849,300,000	45.785	113,156	309.80	0.149	21.25
(55565) 2002 AW197	T	7,072,500,000	47.277	118,732	325.07	0.125	26.008
(589683) 2010 RF43	T	7,386,000,000	49.37	126,700	346.9	0.257	30.04
(523692) 2014 EZ51	T	7,806,300,000	52.182	137,681	376.95	0.229	9.802
(532037) 2013 FY27	T	8,711,000,000	58.23	162,300	444.3	0.395	32.900
(225088) Gonggong	D?/T	10,050,200,000	67.186	201,147	550.70	0.448	34.682
(136199) Eris	D/T	10,161,600,000	67.926	204,479	559.83	0.447	43.217
I Dysnomia	S	37,500	0.000251	15.78586	0.043219	0.00	61.1
(574372) 2010 JO179	T	11,725,200,000	78.378	253,446	693.89	0.495	31.012
(523794) 2015 RR245	T	12,277,300,000	82.069	271,558	743.48	0.587	7.935
2018 VG18	T	12,283,000,000	82.11	271,760	744.0	0.54	25.0
[V774104]	T	15,410,000,000	103	382,000	1,050		15.0
(90377) Sedna	T	78,402,900,000	507.65	4,382,400	11,437.9	0.850	10.711

Physical data and discovery dates

object	id	diameter/axial dimensions (km)			density	mass	surface gravity	rotation period	discovery date	first spacecraft exploration	known satellites
		a or eq.	b or eq.	c or polar	(kg/m3)	(Earth=1)	(Earth=1)	(days)
Sun	*	1,392,530	1,392,530	1,392,518	1,406.4	332946.049	27.877	25.38	N/A	NOV 2018	1,123,812+
Mercury	P	4,881	4,879	4,877	5,429.1	0.05527307	0.377	58.64615	N/A	MAR 1974	-
Venus	P	12,105	12,104	12,103	5,242.5	0.81499809	0.903	-243.01848	N/A	MAY 1961	-
Earth	P	12,756	12,756	12,714	5,513.4	1.00000000	1.000	0.99726957	N/A	N/A	1
I Moon	S	3,476	3,476	3,471	3,345.6	0.01230004	0.165	SYN	N/A	JAN 1959	-
Mars	P	6,801	6,788	6,755	3,929.9	0.10744689	0.379	1.02595676	N/A	JUL 1965	2
(1) Ceres	D/A	966	962	892	2,162	0.00015712	0.029	0.37809042	1 JAN 1801	MAR 2015	-
Jupiter	P	142,984	142,984	133,706	1,326.2	317.828386	2.639	0.413538	N/A	DEC 1973	79
I Io	S	3,659	3,638	3,632	3,527	0.01495211	0.183	SYN	8 JAN 1610	MAR 1979	-
II Europa	S	3,125	3,121	3,119	3,013	0.00803496	0.134	SYN	8 JAN 1610	MAR 1979	-
III Ganymede	S	5,269	5,266	5,263	1,937.6	0.02480638	0.145	SYN	7 JAN 1610	MAR 1979	-
IV Callisto	S	4,821	4,821	4,821	1,834	0.01801125	0.126	SYN	7 JAN 1610	MAR 1979	-
Saturn	P	120,536	120,536	108,728	687.1	95.160979	1.139	0.444009	N/A	SEP 1979	85
III Tethys	S	1,077	1,057	1,053	984	0.00010338	0.015	SYN	21 MAR 1684	NOV 1980	-
IV Dione	S	1,127	1,123	1,119	1,478	0.00018343	0.024	SYN	21 MAR 1684	NOV 1980	-
V Rhea	S	1,531	1,527	1,526	1,234	0.00038621	0.027	SYN	23 DEC 1672	NOV 1980	-
VI Titan	S	5,150	5,149	5,149	1,881.4	0.02252416	0.138	SYN	25 MAR 1655	NOV 1980	-
VIII Iapetus	S	1,492	1,491	1,424	1,083	0.00030232	0.023	SYN	25 OCT 1671	NOV 1980	-
Uranus	P	51,118	51,118	49,945	1,270	14.53574	0.917	-0.71833	13 MAR 1781	JAN 1986	27
I Ariel	S	1,162	1,156	1,155	1,540	0.000209	0.025	SYN	24 OCT 1851	JAN 1986	-
II Umbriel	S	1,169	1,169	1,169	1,523	0.000214	0.025	SYN	24 OCT 1851	JAN 1986	-
III Titania	S	1,578	1,578	1,578	1,714	0.000590	0.038	SYN	11 JAN 1787	JAN 1986	-
IV Oberon	S	1,523	1,523	1,523	1,630	0.000505	0.035	SYN	11 JAN 1787	JAN 1986	-
Neptune	P	49,530	49,530	48,680	1,638	17.14775	1.148	0.6653	23 SEP 1846	AUG 1989	14
I Triton	S	2,709	2,706	2,705	2,060	0.003582	0.079	SYN	10 OCT 1846	AUG 1989	-
(90482) Orcus	T	935	899		1,530	0.000106	0.020	9.54	17 FEB 2004	-	1
(134340) Pluto	D/T	2,375	2,375	2,375	1,857	0.002182	0.063	6.387227	2 MAR 1930	JUL 2015	5
I Charon	S	1,211	1,211	1,211	1,707	0.000266	0.029	SYN	13 APR 1978	JUL 2015	-
(208996) 2003 AZ84	T	747	699		>850	?	?	0.56	13 JAN 2003	-	1
(307261) 2002 MS4	T	797			?	?	?	?	18 JUN 2002	-	-
(24835) 1995 SM55	T	766	644		?	?	?	0.168	19 SEP 1995	-	-
(120347) Salacia	T	896	845		1,300	0.0000733	0.015	0.27	22 SEP 2004	-	1
(136108) Haumea	D/T	2,320	1,704	1,030	1,880	0.000671	0.043	0.16314	7 MAR 2003	-	2
(50000) Quaoar	T	1,163	985		2,200	0.00023	0.031	0.73662	4 JUN 2002	-	1
(136472) Makemake	D?/T	1,430	1,430	1,420	1,700	0.00044	0.035	0.951108	31 MAR 2005	-	1
(174567) Varda	T	719	691		1,300	0.000044	0.014	0.246	21 JUN 2003	-	1
(55565) 2002 AW197	T	774	717		?	?	?	0.369	10 JAN 2002	-	-
(589683) 2010 RF43	T	700			?	?	?	?	6 SEP 2010	-	-
(523692) 2014 EZ51	T	730			?	?	?	?	18 APR 2010	-	-
(532037) 2013 FY27	T	740			?	?	?	?	17 MAR 2013	-	1
(225088) Gonggong	D?/T	1,230			1,740	0.00038	0.041	1.87	17 JUL 2007	-	-
(136199) Eris	D/T	2,330	2,330	2,330	2,520	0.00276	0.083	1.08	21 OCT 2003	-	1
I Dysnomia	S	700			?	?	?	15.7589	10 SEP 2005	-	-
(574372) 2010 JO179	T	720			?	?	?	?	10 MAY 2010	-	-
(523794) 2015 RR245	T	770			?	?	?	?	9 SEP 2015	-	-
2018 VG18	T	770			?	?	?	?	10 NOV 2018	-	-
[V774104]	T	700			?	?	?	?	OCT 2015	-	-
(90377) Sedna	T	1,005	985		?	?	?	0.428	14 NOV 2003	-	-