Asteroids/TNOs with satellites: summary data

Asteroids/TNOs with Satellites: Summary Data
compiled by Wm. Robert Johnston
last updated 15 April 2013

(listed by increasing mean distance from Sun)

minor planet and companion	type	Primary					Secondary
minor planet and companion	type	semimajor axis (AU)	orbital period (yr)	eccentricity	diameter (km)	rotation period (hours)	semimajor axis (km)	orbital period (days)	diameter (km)	discovery method	discovery date	announcement date

(66391) 1999 KW4	NEA ATE	0.642	0.515	0.688	1.32	2.765	2.548	0.7259	0.45	LC/R	21 May 2001	23 May 2001
(137170) 1999 HF1	NEA ATE	0.819	0.741	0.462	3.6	2.319	7.3	0.5840	0.84	LC	23 Apr 1999	1999
1998 ST27	NEA ATE	0.819	0.742	0.530	0.8	<3.0	4.5	[4.1?]	0.12	R	7 Oct 2001	9 Oct 2001
(162483) 2000 PJ5	NEA ATE	0.873	0.815	0.374	0.55	2.642	1.05	0.5900	0.28	LC	10 Jul 2005	Feb 2008
(5381) Sekhmet	NEA ATE	0.947	0.922	0.296	1.0	2.7	1.54	0.521	0.30	R	8 May 2003	6 Jul 2003
(66063) 1998 RO1	NEA ATE	0.991	0.986	0.720	0.8	2.492	1.2	0.6058	0.38	LC	13 Sep 2002	21 Oct 2002
(175706) 1996 FG3	NEA APO	1.054	1.082	0.350	1.8	3.594	2.9	0.6723	0.51	LC	10 Dec 1998	26 Dec 1998
(88710) 2001 SL9	NEA APO	1.061	1.093	0.270	1.0?	2.400	[1.6?]	0.6833	0.2?	LC	2 Oct 2001	3 Nov 2001
2000 CO101	NEA APO	1.076	1.117	0.090	0.62	?	[0.6]	[0.3?]	0.045	R	26 Sep 2009	2 Oct 2009
1994 AW1	NEA AMO	1.105	1.161	0.075	0.94	2.519	[2.0?]	0.9304	0.46	LC	Jan 1994	1994
(164121) 2003 YT1	NEA APO	1.110	1.169	0.292	1.1	2.343	3.9	1.529	0.21	LC/R	6 May 2004	6 May 2004
(35107) 1991 VH S/2008 (35107) 1	NEA APO	1.137	1.213	0.144	1.0	2.624	3.3	1.360	0.42	LC	27 Feb 1997	29 Mar 1997
(185851) 2000 DP107 S/2000 (2000 DP107) 1	NEA APO	1.365	1.596	0.377	0.8	2.774	2.62	1.758	0.3	R	22 Sep 2000	3 Oct 2000
(1862) Apollo	NEA APO	1.470	1.783	0.560	1.6	3.065	>3	[0.8?]	0.08	R	29 Oct 2005	4 Nov 2005
2004 FG11	NEA APO	1.588	2.001	0.724	0.15	?	0.25	0.83	<0.08	R	7 Apr 2012	25 Apr 2012
(311066) 2004 DC	NEA APO	1.634	2.088	0.400	0.36	2.6	0.75	0.9583	0.07	R	2 Jun 2006	2 Jun 2006
(136617) 1994 CC	NEA APO	1.638	2.096	0.417	0.62	2.389	1.729 6.13	1.243 8.38	0.08 0.11	R R	Jun 2009 Jun 2009	19 Jun 2009 19 Jun 2009
(65803) Didymos	NEA APO	1.644	2.109	0.384	0.75	2.259	1.18	0.4963	0.17	LC	20 Nov 2003	28 Nov 2003
(69230) Hermes	NEA APO	1.655	2.130	0.624	0.6	13.894	[1.1?]	0.5789	0.54	R	18 Oct 2003	20 Oct 2003
(162000) 1990 OS	NEA APO	1.678	2.174	0.463	0.30	?	>0.6	0.88	0.045	R	5 Nov 2003	10 Nov 2003
(153958) 2002 AM31	NEA APO	1.703	2.223	0.452	0.72?	3.32	?	?	?	R	12 Jul 2012	Jul 2012
(51356) 2000 RY76	MCA	1.812	2.439	0.112	3.2?	2.557	[13?]	2.5854	0.7?	LC	8 Oct 2012	Mar 2013
(3309) Brorfelde	MB	1.818	2.450	0.053	6.1?	2.504	[11?]	0.7700	1.6?	LC	25 Oct 2005	7 Nov 2005
2002 BM26	NEA AMO	1.833	2.481	0.444	0.6	2.7	[1.4]	1.075	0.10	R	9 Feb 2002	11 Feb 2002
(5143) Heracles	NEA APO	1.833	2.483	0.772	3.6	2.706	[4]	0.646?	0.6	R	10 Dec 2011	13 Jul 2012
2008 DG17	NEA APO	1.838	2.491	0.449	0.4?	?	?	?	?	R	Mar 2013	Mar 2013
(5407) 1992 AX	MCA	1.838	2.491	0.278	3.9	2.549	[6?]	0.5633	0.78	LC	7 Jan 1997	1997
2007 LE	NEA APO	1.839	2.493	0.517	0.5	?	[0.8]	0.54	0.18	R	31 May 2012	Jun 2012
(85938) 1999 DJ4	NEA APO	1.853	2.522	0.484	0.43	2.514	[0.8?]	0.7388	0.21	LC	21 Feb 2004	23 Apr 2004
(1727) Mette	MCA	1.854	2.524	0.102	10.2	2.981	[21?]	0.875	2.0	LC	17 Jan 2013	5 Feb 2013
2006 GY2	NEA APO	1.858	2.532	0.496	0.4	2.27	>0.5	0.488	0.08	R	15 May 2006	2 Jun 2006
(4674) Pauling S/2004 (4674) 1	MB	1.859	2.534	0.070	4.5	2.521	250?	[130?]	1.4	AOT	4 Mar 2004	5 Mar 2004
(1509) Esclangona S/2003 (1509) 1	MB	1.866	2.549	0.032	7.8	3.253	140?	[21?]	2.6	AOT	13 Feb 2003	18 Feb 2003
(53432) 1999 UT55	MCA	1.871	2.560	0.116	2.6?	3.330	[4?]	0.5875	0.6	LC	3 Jan 2013	Feb 2013
(2047) Smetana	MB	1.872	2.561	0.003	3.0	2.497	[6?]	0.9346	0.6	LC	31 Oct 2012	Mar 2013
(7958) Leakey	MB	1.877	2.572	0.077	5.0?	2.348	[20?]	2.10	1.6?	LC	13 Jun 2012	Oct 2012
(2131) Mayall	MB	1.887	2.592	0.111	7.5	2.568	[16?]	0.9783	2.0	LC	30 Nov 2009	31 Dec 2009
(3169) Ostro	MB	1.892	2.602	0.067	3.9	6.509	5.2	0.2712	3.4	LC	5 Nov 2005	20 Dec 2005
(3873) Roddy	MCA	1.892	2.603	0.134	9.2?	2.480	[17?]	0.8017	2.5?	LC	13 Aug 2012	Jan 2013
(1866) Sisyphus	NEA APO	1.894	2.606	0.538	8.5	2.700	?	?	?	R	Dec 1985	Dec 2007
(52316) 1992 BD	MB	1.897	2.612	0.065	3.3?	2.763	[5?]	0.5598	0.5?	LC	17 Dec 2012	Mar 2013
(1453) Fennia	MB	1.897	2.613	0.028	7.0	4.412	[15?]	0.9579	2.0	LC	4 Nov 2007	1 Dec 2007
(2577) Litva	MCA	1.904	2.628	0.138	7.2?	2.813	[21?]	1.495	2.5?	LC	28 Feb 2009	11 Mar 2009
(5905) Johnson	MB	1.910	2.640	0.072	5.0	3.782	[10?]	0.9077	2.0	LC	1 Apr 2005	13 Apr 2005
(9069) Hovland	MB	1.913	2.646	0.118	3.0	4.218	[8?]	1.264	0.9	LC	Oct 2004	16 Nov 2004
(5477) Holmes	MB	1.917	2.655	0.075	3.0	2.994	[7?]	1.018	1.1	LC	2 Nov 2005	15 Nov 2005
(26471) 2000 AS152	MCA	1.918	2.657	0.154	7.1?	2.687	[22?]	1.637	2.6?	LC	13 Jul 2009	20 Jul 2009
(8026) Johnmckay	MB	1.925	2.671	0.075	1.7	372.	?	?	?	LC		2010
(5899) Jedicke	MB	1.928	2.678	0.117	2.5	3.5?	[4.4?]	0.696	0.8	LC		25 Feb 2010
2000 UG11	NEA APO	1.929	2.678	0.573	0.26	4.44	0.426	0.767	0.13	R	3 Nov 2000	10 Nov 2000
(76818) 2000 RG79	MB	1.930	2.681	0.096	3.6	3.166	[6?]	0.5885	1.3	LC	Aug 2005	30 Aug 2005
2003 SS84	NEA APO	1.931	2.683	0.571	0.12	?	[0.3?]	1	0.06	R	4 Oct 2003	10 Oct 2003
(7187) Isobe	MB	1.938	2.698	0.086	5.5?	4.243	[19?]	1.3842	?	LC	26 Aug 2012	Jan 2013
(1139) Atami	MCA	1.948	2.718	0.255	6.0	27.45	>15	1.144	5.0	LC	< Sep 2005	1 Sep 2005
(15822) 1994 TV15	MB	1.948	2.719	0.080	1.7?	2.96	[5?]	1.55	?	LC		2010
2002 KK8	NEA AMO	1.952	2.728	0.466	0.5	?	?	?	0.10	R	8 Jun 2002	17 Jun 2002
(79472) 1998 AX4	MB	1.962	2.748	0.080	3.8?	2.880	[8?]	1.08	1.1?	LC	17 Mar 2012	Oct 2012
(7088) Ishtar	NEA AMO	1.981	2.788	0.391	1.4?	2.679	[2.8?]	0.8604	0.6?	LC	4 Dec 2005	31 Jan 2006
(153591) 2001 SN263	NEA AMO	1.987	2.800	0.478	2.6	3.434	3.804 16.63	0.686 6.225	0.46 1.06	R R	12 Feb 2008 12 Feb 2008	12 Feb 2008 12 Feb 2008
(31345) 1998 PG	NEA AMO	2.016	2.861	0.391	0.9	2.516	[1.4?]	0.583?	0.3	LC	29 Aug 1998	1998
2005 NB7	NEA APO	2.044	2.923	0.517	0.5	3.488	>0.6	0.6367	0.2	R	11 Apr 2008	17 Apr 2008
(5646) 1990 TR	NEA AMO	2.143	3.137	0.437	3.0?	3.200	[6?]	0.8113	0.5?	LC	22 Nov 2012	Mar 2013
(6244) Okamoto	MB	2.160	3.174	0.152	6.7?	2.896	[13?]	0.8467	1.7?	LC	26 Sep 2006	19 Oct 2006
(6265) 1985 TW3	MB	2.166	3.188	0.193	4.8	2.709	[8?]	0.6608	1.2	LC	15 Jul 2007	2 Aug 2007
(6615) Plutarchos	MB	2.170	3.196	0.126	3.1	2.325	[10?]	1.668	?	LC	14 Apr 2007	Oct 2007
(2121) Sevastopol	MB	2.184	3.227	0.179	8.6	2.906	[26?]	1.546	3.5	LC		2010
(1830) Pogson	MB	2.188	3.237	0.056	7.9	2.570	[18?]	1.010	2.5	LC	18 Apr 2007	10 May 2007
(32008) 2000 HM53	MB	2.192	3.246	0.193	4.2?	3.017	[13?]	1.677?	1.7?	LC	5 Aug 2007	20 Sep 2007
(1717) Arlon	MB	2.196	3.253	0.129	9.1	5.148	[17?]	0.7598	?	LC	4 Dec 2005	17 Jan 2006
(3671) Dionysus S/1997 (3671) 1	NEA APO	2.197	3.258	0.542	1.43	2.705	3.4	1.155	0.3	LC	30 May 1997	10 Jun 1997
(17260) 2000 JQ58	MB	2.204	3.273	0.183	4.6?	3.129	[7?]	0.6149	1.2?	LC	29 Jan 2006	14 Mar 2006
2007 DT103	NEA APO	2.206	3.276	0.575	0.3	2.703	0.45?	[0.6?]	>0.08	R	26 Jul 2007	3 Aug 2007
(15700) 1987 QD	MCA	2.209	3.282	0.316	4.2?	3.059	?	?	?	LC		2010
(1089) Tama	MB	2.214	3.294	0.127	10.7	16.444	20.7	0.6852	7.3	LC	24 Dec 2003	12 Jan 2004
2008 BT18	NEA APO	2.221	3.311	0.595	0.6	2.726	1.5?	[1.2?]	>0.2	R	6 Jul 2008	29 Jul 2008
(32039) 2000 JO23	MCA	2.223	3.314	0.283	4.0?	6.598	[53?]	15	1.3?	LC	3 Sep 2007	23 Nov 2007
(9617) Grahamchapman	MB	2.224	3.317	0.113	2.7	2.286	[5.2?]	0.8077	0.7	LC	27 Jan 2006	1 Mar 2006
(2478) Tokai	MB	2.226	3.321	0.069	8.1	25.885	[21?]	1.079	5.8	LC	20 Jan 2007	30 Jan 2007
(2754) Efimov	MB	2.228	3.326	0.232	6.5?	2.450	[10?]	0.6152	1.3?	LC	14 Aug 2006	4 Sep 2006
(2815) Soma	MB	2.234	3.338	0.169	7.0	2.733	[13?]	0.7465	1.7	LC		2011
(276049) 2002 CE26	NEA APO	2.234	3.338	0.559	3.46	3.293	4.7	0.65	0.3	R	30 Aug 2004	4 Sep 2004
(10208) Germanicus	MB	2.235	3.342	0.202	3.2	3.348	[13?]	2.440	1.5	LC	6 Aug 2007	25 Sep 2007
(1052) Belgica	MB	2.236	3.344	0.144	9.8	2.710	[34?]	1.969	3.5	LC	17 Nov 2012	7 Jan 2013
(3749) Balam -- S/2002 (3749) 1	MB	2.237	3.346	0.109	4.3	2.805	20 289	1.391 61	1.7 1.8	LC AOT	15 Jul 2007 8 Feb 2002	12 Mar 2008 13 Feb 2002
(3073) Kursk	MB	2.242	3.358	0.136	6.7?	3.447	[22?]	1.873	1.7?	LC	11 Dec 2006	3 Jan 2007
(2691) Sersic	MB	2.246	3.365	0.112	5.0	3.881	[12?]	1.117	2.2	LC		2011
(939) Isberga	MB	2.246	3.366	0.178	10.99	2.917	[26?]	1.117	?	LC	26 Feb 2006	2007
(8116) Jeanperrin	MB	2.250	3.375	0.159	4.5	3.617	[13?]	1.506	1.5	LC	4 Oct 2007	9 Nov 2007
(34706) 2001 OP83	MCA	2.253	3.381	0.383	3.5?	2.594	[7?]	0.865	1.0?	LC	11 Dec 2005	29 Dec 2005
(4951) Iwamoto	MB	2.257	3.390	0.167	4.4	118.0	[30?]	4.917	3.5	LC	11 May 2007	11 May 2007
(114319) 2002 XD58	MCA	2.258	3.392	0.274	2.6?	7.954	?	?	?	LC	25 Aug 2005	23 Dec 2005
(3982) Kastel	MB	2.261	3.399	0.218	6.8	5.835	?	?	?	LC	24 Sep 2005	1 Oct 2005
(4607) Seilandfarm	MB	2.264	3.407	0.019	7.1	3.968	[19?]	1.318	2.1	LC	17 Jan 2009	11 Mar 2009
(1338) Duponta	MB	2.264	3.407	0.113	7.7	3.855	[14?]	0.7321	1.8	LC	6 Mar 2007	27 Mar 2007
(2486) Metsahovi	MB	2.268	3.416	0.080	8.42	4.452	?	?	?	LC	12 Dec 2006	26 Feb 2007
(809) Lundia	MB	2.284	3.451	0.193	6.9	15.418	15.8	0.6424	6.1	LC	18 Sep 2005	1 Oct 2005
(317) Roxane S/2009 (317) 1	MB	2.287	3.458	0.085	18.7	8.169	257?	[16?]	5.3	AOT	24 Nov 2009	26 Nov 2009
(9260) Edwardolson	MB	2.291	3.467	0.230	4.0	3.085	[7?]	0.741	1.1	LC	6 Oct 2005	2 Nov 2005
(99913) 1997 CZ5	MCA	2.294	3.475	0.397	6.8?	2.835	[11?]	0.6117	1.3?	LC		2011
(16635) 1993 QO	MCA	2.298	3.485	0.285	4.6?	7.622	[12?]	1.344	1.2?	LC	2 Sep 2007	19 Nov 2007
(218144) 2002 RL66	MCA	2.305	3.500	0.341	3.5?	587.0	?	?	?	LC		2010
(136993) 1998 ST49	NEA APO	2.310	3.510	0.593	1.0?	2.301	?	?	?	R	Oct 2012	Oct 2012
(6084) Bascom	MB	2.312	3.516	0.236	6.0	2.745	[20?]	1.813	2.2	LC	29 Dec 2005	6 Feb 2006
(2006) Polonskaya	MB	2.325	3.545	0.193	4.5	3.118	[8?]	0.7979	1.0	LC	1 Nov 2005	16 Nov 2005
(3703) Volkonskaya	MB	2.331	3.560	0.135	3.5	3.235	[8?]	1	1.4	LC	2005	Dec 2005
(3868) Mendoza	MB	2.334	3.567	0.098	9.1	2.771	[20?]	1.016	2.0	LC	25 Apr 2009	6 Jun 2009
(5481) Kiuchi	MB	2.339	3.577	0.063	7.5?	3.620	[15?]	0.8708	2.5?	LC	13 Mar 2008	15 Apr 2008
(3951) Zichichi	MB	2.339	3.578	0.174	9.0?	3.394	[22?]	1.150	3.0?	LC		2011
(7225) Huntress	MB	2.341	3.582	0.203	6.5	2.440	[10?]	0.6113	1.4	LC	7 Dec 2007	31 Jan 2008
(3673) Levy	MB	2.346	3.593	0.184	6.2	2.688	[13?]	0.900	1.7	LC	5 Dec 2007	12 Dec 2007
1994 XD	NEA APO	2.348	3.599	0.733	0.6	2.736	0.6?	0.749	>0.15	R	24 Jun 2005	11 Jul 2005
(4786) Tatianina	MB	2.358	3.620	0.193	3.2	2.923	[7?]	0.9029	0.6	LC	20 Mar 2006	11 Apr 2006
(15268) Wendelinefroger	MB	2.366	3.640	0.235	3.8?	2.422	[9?]	1.045	1.0?	LC	24 Sep 2008	20 Oct 2008
(7369) Gavrilin	MCA	2.370	3.650	0.319	7.5?	49.12	[27?]	2.047	2.4?	LC		2008
(854) Frostia	MB	2.371	3.650	0.173	6.4	37.728	[17?]	1.572	4.6	LC	17 Jul 2004	Aug 2004
(2044) Wirt	MCA	2.381	3.673	0.344	6.5	3.690	[12?]	0.7904	1.62	LC	8 Dec 2005	6 Jan 2006
(5474) Gingasen	MB	2.384	3.680	0.067	8.7?	3.624	?	?	?	LC		2008
2006 VV2	NEA APO	2.386	3.686	0.605	1.8	2.41	1.5?	[0.23?]	>0.3	R	27 Mar 2007	5 Apr 2007
(16525) Shumarinaiko	MB	2.399	3.716	0.139	5.25	2.593	[8?]	0.6004	>0.83	LC	9 Jan 2013	Feb 2013
(3782) Celle	MB	2.415	3.752	0.095	5.4	3.839	[18?]	1.524	2.3	LC	18 Sep 2001	3 May 2003
(4383) Suruga	MB	2.424	3.774	0.064	6.5	3.407	[11?]	0.6828	>1.3	LC	1 Feb 2013	Feb 2013
(7888) 1993 UC	NEA APO	2.436	3.801	0.664	3.0?	2.340	?	?	?	R	Feb 2013	Feb 2013
(6708) Bobbievaile	MB	2.445	3.823	0.182	8.0	8.221	[19?]	1.029	4.6	LC	16 Apr 2009	7 May 2009
(4029) Bridges	MB	2.526	4.015	0.131	7.8	3.575	[13?]	0.6796	1.9	LC	11 Apr 2006	8 May 2006
(11264) Claudiomaccone	MB	2.579	4.141	0.234	<4	3.187	6?	0.6296	>1.2	LC	4 Nov 2005	Dec 2005
(1333) Cevenola	MB	2.633	4.272	0.134	17	4.88	?	?	?	LC	2008	12 Oct 2008
(1313) Berna	MB	2.655	4.326	0.209	11	25.464	[25?]	1.061	8.4	LC	6 Feb 2004	23 Feb 2004
(45) Eugenia S/2004 (45) 1 Petit-Prince	MB	2.720	4.486	0.083	215	5.699	610 1,165	1.793 4.716	5 7	AOT AOT	14 Feb 2004 1 Nov 1998	7 Mar 2007 20 Mar 1999
(93) Minerva S/2009 (93) 2 S/2009 (93) 1	MB	2.755	4.573	0.141	142	5.982	385 651	1.114 2.408	3 4	AOT AOT	16 Aug 2009 16 Aug 2009	31 Aug 2009 31 Aug 2009
(41) Daphne S/2008 (41) 1	MB	2.761	4.589	0.275	174	5.988	440?	1.1	<2	AOT	28 Mar 2008	31 Mar 2008
(4492) Debussy	MB	2.765	4.598	0.181	15	26.606	[31?]	1.109	9.4	LC	30 Oct 2002	15 Jun 2004
(216) Kleopatra Cleoselene Alexhelios	MB	2.795	4.674	0.249	217x97x81	5.385	454 678	1.24 2.32	6.9 8.9	AOT AOT	19 Sep 2008 19 Sep 2008	24 Sep 2008 24 Sep 2008
(17246) 2000 GL74 S/2004 (17246) 1	MB	2.841	4.788	0.021	4.5	?	228	90	1.0	HST	14 Jan 2004	24 Feb 2004
(22899) 1999 TO14 S/2003 (22899) 1	MB	2.845	4.798	0.081	5.5	4.030	182	56	1.2	HST	26 Jul 2003	26 Oct 2003
(243) Ida Dactyl	MB	2.862	4.842	0.042	60x25x19	4.634	108	1.54	1.6x1.4x1.2	SP	28 Aug 1993	12 Mar 1994
(22) Kalliope Linus	MB	2.909	4.962	0.100	181	4.148	1,095	3.596	26	AOT	29 Aug 2001	3 Sep 2001
(283) Emma S/2003 (283) 1	MB	3.047	5.320	0.149	135	6.888	581	3.353	9.0	AOT	14 Jul 2003	27 Jul 2003
(130) Elektra S/2003 (130) 1	MB	3.124	5.523	0.209	182	5.225	1,318	5.258	7.0	AOT	15 Aug 2003	17 Aug 2003
(379) Huenna S/2003 (379) 1	MB	3.137	5.557	0.187	92	7.022	3,340	87.6	5.8	AOT	14 Aug 2003	15 Aug 2003
(762) Pulcova	MB	3.157	5.610	0.103	137	5.839	703	4.438	19	AOT	22 Feb 2000	24 Oct 2000
(90) Antiope S/2000 (90) 1	MB	3.164	5.627	0.159	88	16.505	171	0.6877	84	AOT	10 Aug 2000	3 Oct 2000
(702) Alauda S/2007 (702) 1	MB	3.193	5.707	0.020	195	8.354	1,227	4.914	3.4	AOT	26 Jul 2007	2 Aug 2007
2005 AB	NEA AMO	3.218	5.773	0.655	>1.9	3.339	[3.4?]	0.7471	0.46	LC	Feb 2005	11 Feb 2005
(8373) Stephengould	MB	3.281	5.944	0.554	5?	4.435	[15?]	1.423	1.4?	LC		4 Mar 2010
(121) Hermione S/2002 (121) 1	MB	3.450	6.408	0.135	240x150	5.551	747	2.563	32	AOT	28 Sep 2002	30 Sep 2002
(87) Sylvia Remus Romulus	MB	3.490	6.521	0.089	286	5.184	706 1,357	1.379 3.650	11 11	AOT AOT	9 Aug 2004 18 Feb 2001	11 Aug 2005 23 Feb 2001
(107) Camilla S/2001 (107) 1	MB	3.491	6.524	0.068	223	4.844	1,250	3.722	16	HST	1 Mar 2001	19 Mar 2001
(617) Patroclus Menoetius	JTA L5	5.217	11.916	0.140	106	103.2	680	4.283	98	AOT	22 Sep 2001	29 Oct 2001
(624) Hektor S/2006 (624) 1	JTA L4	5.243	12.006	0.024	363x207	6.923	1,200?	[2.6?]	15	AOT	16 Jul 2006	21 Jul 2006
(17365) 1978 VF11	JTA L5	5.266	12.086	0.079	33	12.672	[43?]	0.528	28	LC	Apr 2005	Sep 2007
(29314) Eurydamas	JTA L5	5.274	12.111	0.073	32	15.035	[41?]	0.6265	24	LC	Apr 2005	Sep 2007
(42355) Typhon Echidna	CEN	37.934	233.6	0.538	162	9.67	1,628	18.971	89	HST	20 Jan 2006	15 Feb 2006
1999 OJ4	TNO	38.007	234.3	0.027	75	?	3,267	84.12	72	HST	4 Oct 2002	6 Oct 2005
(82157) 2001 FM185	TNO	38.608	239.9	0.057	138?	?	[3,100?]	[33?]	120?	HST	28 Nov 2008	2011
1998 WV24	TNO PLU	39.193	245.4	0.039	110?	?	[1,400?]	[14?]	96?	HST	27 Aug 2007	29 Oct 2008
(38628) Huya	TNO PLU	39.297	246.3	0.274	472	6.75	[1,700?]	[2.6?]	248?	HST	6 May 2012	12 Jul 2012
(134340) Pluto Charon S/2012 (134340) 1 Nix S/2011 (134340) 1 Hydra	TNO*PLU	39.348	246.8	0.247	2346	153.293	19,570 42,000 48,830 57,890 64,740	6.3872 20.2 24.855 32.187 38.202	1212 12? 88? 27? 72?	IMG HST HST HST HST	22 Jun 1978 26 Jun 2012 15 May 2005 28 Jun 2011 15 May 2005	7 Jul 1978 11 Jul 2012 31 Oct 2005 20 Jul 2011 31 Oct 2005
(90482) Orcus Vanth	TNO PLU	39.368	247.0	0.221	904	13.188	9,006	[10?]	280	HST	13 Nov 2005	27 Feb 2007
(341520) 2007 TY430	TNO PLU	39.462	247.9	0.269	102	?	21,000	961.2	97	AOT	14 Oct 2007	1 Aug 2008
(139775) 2001 QG298	TNO PLU	39.504	248.3	0.196	135	13.774	172	0.5739	117	LC	2004	12 Feb 2004
(47171) 1999 TC36 -- S/2001 (1999 TC36) 1	TNO PLU	39.614	249.3	0.229	286	45.763	867 7,411	1.907 50.38	265 139	HST HST	Oct 2007 8 Dec 2001	Oct 2007 10 Jan 2002
(208996) 2003 AZ84	TNO PLU	39.641	249.6	0.174	682	13.44	[7,200?]	[13?]	68	HST	2 Dec 2005	22 Feb 2007
2004 KH19	TNO	40.693	259.6	0.120	179?	?	[13,000?]	[210?]	129?	IMG		12 Dec 2011
2005 VZ122	TNO CUB	41.571	268.0	0.184	124?	?	[2,300?]	[30?]	49?	HST	25 Sep 2008	2011
(120347) Salacia Actaea	TNO CUB	42.076	272.9	0.104	930	?	5,620	5.494	320	HST	21 Jul 2006	19 Sep 2006
(80806) 2000 CM105	TNO CUB	42.311	275.2	0.068	160?	?	[2,700?]	[23?]	121?	HST	5 Oct 2002	6 Oct 2005
2001 XP254	TNO 3:5	42.511	277.2	0.223	108?	?	[1,200?]	[12?]	77?	HST	11 Nov 2008	2011
1999 RT214	TNO CUB	42.515	277.2	0.046	100?	?	[3,300?]	[64?]	69?	HST	25 Jul 2006	29 Sep 2006
2002 VT130	TNO CUB	42.691	278.9	0.030	186?	?	[2,500?]	[15?]	152?	HST	2009	24 Sep 2009
2003 QY90	TNO CUB	42.723	279.3	0.053	81	3.4	8,550	309.7	80	IMG	23 Oct 2003	29 Oct 2003
(134860) 2000 OJ67	TNO CUB	42.816	280.2	0.018	138	?	2,360	22.041	108	HST	25 Jun 2003	6 Oct 2005
2003 UN284	TNO CUB	42.873	280.7	0.009	124	?	[56,000?]	3,189	83	IMG	24 Oct 2003	5 Dec 2003
(55637) 2002 UX25	TNO CUB	42.896	280.9	0.145	649	14.38?	[5,000?]	[8?]	205	HST	26 Aug 2005	22 Feb 2007
[hst5]	TNO	42.9	281	0.0	135?	?	[16,000?]	?	135?	HST	3 Aug 2005	Oct 2010
(160256) 2002 PD149	TNO CUB	43.024	282.2	0.062	186?	?	[24,400?]	[470?]	155?	HST	22 May 2007	31 Aug 2007
(136108) Haumea Namaka Hi'iaka	TNO	43.058	282.5	0.195	1960x1520x1000?	3.915	25,660 49,900	18.278 49.46	160 320	AOT AOT	30 Jun 2005 26 Jan 2005	7 Nov 2005 29 Jul 2005
2005 GD187	TNO CUB	43.137	283.3	0.017	123?	?	[7,600?]	[150?]	102?	HST	21 Jan 2009	2011
(50000) Quaoar Weywot	TNO CUB	43.179	283.7	0.036	890	17.679	14,500	12.44	68	HST	14 Feb 2006	22 Feb 2007
2001 XR254	TNO CUB	43.188	283.8	0.028	169	?	9,310	125.6	140	HST	20 Dec 2006	14 Mar 2007
1999 XY143	TNO CUB	43.259	284.5	0.079	213?	?	[2,700?]	[14?]	179?	HST	2009	24 Sep 2009
(119067) 2001 KP76	TNO 4:7	43.386	285.8	0.189	153?	?	[8,900?]	[130?]	146?	HST	8 May 2007	19 Feb 2008
2003 HG57	TNO CUB	43.548	287.4	0.030	156?	?	[13,000?]	[210?]	156?	HST	22 Dec 2010	2012
2003 QW111	TNO 4:7	43.752	289.4	0.115	142	?	6,720	110.1	84	HST	25 Jul 2006	7 Sep 2006
(275809) 2001 QY297	TNO CUB	43.754	289.4	0.081	164	?	9,960	138.1	150	HST	< Mar 2007	14 Mar 2007
(66652) Borasisi Pabu	TNO CUB	43.760	289.5	0.086	160	?	4,530	46.26	131	HST	23 Apr 2003	6 Jun 2003
2003 YS179	TNO CUB	43.819	290.1	0.024	126?	?	[7,800?]	[150?]	110?	HST	2 Nov 2008	2011
2001 QW322	TNO CUB	43.917	291.0	0.025	128	?	10,200	6,210	126	AOT	24 Aug 2001	9 Nov 2001
(88611) Teharonhiawako Sawiskera	TNO CUB	43.998	291.8	0.027	147	9.50?	27,700	828.8	106	IMG	11 Oct 2001	15 Oct 2001
2006 BR284	TNO CUB	44.023	292.1	0.044	90	?	25,300	1,501	71	IMG	2006	11 Aug 2011
2000 CF105	TNO CUB	44.051	292.4	0.041	64	?	33,300	3,990	50	HST	12 Jan 2002	22 Mar 2002
2001 QQ322	TNO CUB	44.063	292.5	0.055	171?	?	[3,900?]	[32?]	156?	HST	15 Jun 2007	4 Mar 2008
(79360) Sila-Nunam	TNO CUB	44.064	292.5	0.014	244?	?	2,780	12.50	230	HST	22 Oct 2002	6 Oct 2005
2005 EF298	TNO CUB	44.136	293.2	0.091	138?	?	[3,300?]	[38?]	105?	HST	21 Jan 2009	2011
2002 XH91	TNO CUB	44.156	293.4	0.084	298?	?	[20,000?]	[190?]	185?	HST	8 Nov 2008	27 May 2009
(303712) 2005 PR21	TNO CUB	44.167	293.5	0.102	227?	?	[3,600?]	[22?]	137?	HST	20 May 2007	4 Mar 2008
2001 FL185	TNO CUB	44.181	293.7	0.077	142?	?	[1,900?]	[17?]	88?	HST	< Mar 2007	14 Mar 2007
2001 RZ143	TNO CUB	44.264	294.5	0.068	108?	?	[1,600?]	[17?]	90?	HST	< Mar 2007	14 Mar 2007
2003 QA91	TNO CUB	44.371	295.6	0.071	253?	?	[1,900?]	[6?]	242?	HST	< Mar 2007	14 Mar 2007
2003 WU188	TNO CUB	44.414	296.0	0.043	258?	?	[1,300?]	[4?]	187?	HST	< Mar 2007	14 Mar 2007
(148780) Altjira	TNO CUB	44.491	296.8	0.058	164	?	9,900	139.6	148	HST	< Mar 2007	14 Mar 2007
2006 JZ81	TNO CUB	44.595	297.8	0.078	122	?	32,300	1,500	78	AOT	2006	11 Aug 2011
(123509) 2000 WK183	TNO CUB	44.673	298.6	0.050	106	?	2,370	30.92	101	HST	24 Nov 2005	21 Feb 2007
2003 TJ58	TNO CUB	44.708	298.9	0.092	65	?	3,770	137.3	51	HST	22 Nov 2006	14 Mar 2007
1998 WW31 S/2000 (1998 WW31) 1	TNO CUB	44.900	300.9	0.082	148	?	22,300	574	123	IMG	22 Dec 2000	16 Apr 2001
(160091) 2000 OL67	TNO CUB	45.118	303.1	0.108	153?	?	[7,800?]	[120?]	116?	HST	26 Jun 2007	19 Feb 2008
2004 PB108	TNO CUB	45.160	303.5	0.111	243	?	10,400	97.02	132	HST	4 Aug 2006	3 Mar 2007
2000 WT169	TNO CUB	45.167	303.6	0.011	205?	?	[2,600?]	[14?]	168?	HST	2009	27 Sep 2009
(58534) Logos Zoe	TNO CUB	45.276	304.7	0.123	82	?	8,220	309.9	63	HST	17 Nov 2001	11 Feb 2002
1999 RY214	TNO CUB	45.378	305.7	0.183	125?	?	[1,500?]	[15?]	76?	HST	2009	24 Sep 2009
(174567) 2003 MW12	TNO CUB	45.583	307.8	0.143	818?	11.8	[4,200?]	[4?]	420?	HST	26 Apr 2009	2011
2005 EO304	TNO CUB	45.583	307.8	0.066	152	?	69,800	3,580	78	IMG	15 Apr 2005	10 Mar 2005
2006 CH69	TNO CUB	45.952	311.5	0.041	100	?	27,600	1,421	82	AOT	2006	5 Aug 2010
2002 VF130	TNO CUB	46.087	312.9	0.119	121?	?	[22,000?]	[760?]	105?	HST	3 Nov 2008	3 May 2009
2000 CQ114	TNO CUB	46.194	314.0	0.115	132?	?	[5,900?]	[90?]	115?	HST	6 Jun 2003	16 Feb 2004
2001 QC298	TNO CUB	46.336	315.4	0.124	243	?	3,810	19.23	198	HST	4 Oct 2002	17 Dec 2002
2003 QR91	TNO CUB	46.476	316.8	0.181	163?	?	[1,800?]	[11?]	149?	HST	< Mar 2007	14 Mar 2007
2003 YU179	TNO CUB	47.065	322.9	0.165	146?	?	[2,000?]	[18?]	80?	HST	2009	27 Sep 2009
2003 FE128	TNO 1:2	47.780	330.3	0.250	178?	?	[2,100?]	[14?]	131?	HST	26 Jun 2010	2012
(26308) 1998 SM165 S/2001 (26308) 1	TNO 1:2	47.860	331.1	0.371	268	8.4	11,370	130.2	81	HST	22 Dec 2001	24 Jan 2002
2000 QL251	TNO 1:2	47.873	331.2	0.217	148	?	5,000	56.45	143	HST	25 Jul 2006	12 Sep 2006
(119979) 2002 WC19	TNO 1:2	48.225	334.9	0.265	440?	?	[2,800?]	[6?]	139?	HST	5 Nov 2006	27 Feb 2007
(182933) 2002 GZ31	TNO SDO	50.248	356.2	0.238	195?	?	[2,100?]	[12?]	123?	HST	23 Apr 2006	28 Feb 2007
(48639) 1995 TL8	TNO	52.793	383.6	0.238	333?	?	[420?]	[0.5?]	152?	HST	9 Nov 2002	6 Oct 2005
(60621) 2000 FE8	TNO 2:5	55.318	411.4	0.404	146?	?	[1,200?]	[8?]	111?	HST	15 Jan 2007	3 Mar 2007
(82075) 2000 YW134	TNO 3:8	58.274	444.8	0.294	455?	?	[1,900?]	[3.3?]	158?	HST	25 Oct 2002	6 Oct 2005
(60458) 2000 CM114	TNO SDO	59.698	461.3	0.405	167?	?	[2,200?]	[15?]	128?	HST	16 Jan 2006	18 Mar 2006
2006 SF369	TNO 1:3	63.161	502.0	0.381	144?	?	[3,100?]	[28?]	141?	HST	13 Nov 2007	19 Feb 2008
(136199) Eris Dysnomia	TNO*SDO	67.958	560.2	0.437	2326	25.92	37,600	15.79	106	AOT	10 Sep 2005	2 Oct 2005
(229762) 2007 UK126	TNO SDO	74.377	641.4	0.494	590	?	[3,600?]	[6?]	103	HST	?	2011
(65489) Ceto Phorcys	TNO	100.981	1014.8	0.824	223	4.43	1,840	9.554	171	HST	11 Apr 2006	Aug 2006

Notes: figures in brackets are derived based on various assumptions (may involve assumed albedoes, densities, or correspondence of observed separation to semimajor axis). See individual object pages for sources. Types include:

MB = main belt asteroid
MCA = Mars crossing asteroid
NEA = near-Earth asteroid
- AMO = Amor
- APO = Apollo
- ATE = Aten
JTA = Jupiter Trojan asteroid
- L4 = in L4 position
- L5 = in L5 position
TNO = trans-Neptunian object
- CUB = cubewano
- PLU = plutino
- SDO = scattered disk object
- 1:2 = 1:2 resonance object
- 2:5 = 2:5 resonance object
- 3:5 = 3:5 resonance object
- 4:7 = 4:7 resonance object
- * = dwarf planet

Detection method for secondaries:

AOT = direct imaging, adaptive optics telescope
HST = direct imaging, Hubble Space Telescope
IMG = direct imaging, other ground based telescope
LC = photometric light curve
OCC = stellar occultation
R = radar
SP = direct imaging by space probe

Other reports of asteroid/TNO companions

© 2001-2012, 2013 by Wm. Robert Johnston.
Last modified 15 April 2013.
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