Asteroids/TNOs with Satellites: Summary Data

compiled by Wm. Robert Johnston
last updated 13 July 2013

(listed by increasing mean distance from Sun)

minor planet
and companion
typePrimarySecondary
semimajor axis (AU)orbital period (yr)eccentricitydiameter (km)rotation period (hours)semimajor axis (km)orbital period (days)diameter (km)discovery
method
discovery dateannouncement date
(66391) 1999 KW4 NEA ATE 0.642 0.5150.688 1.32 2.765 2.548 0.7259 0.45 LC/R 21 May 200123 May 2001
(137170) 1999 HF1 NEA ATE 0.819 0.7410.462 3.6 2.319 7.3 0.5840 0.84 LC 23 Apr 1999 1999
(363027) 1998 ST27 NEA ATE 0.819 0.7420.530 0.8 <3.0 4.5 [4.1?] 0.12 R 7 Oct 2001 9 Oct 2001
(162483) 2000 PJ5 NEA ATE 0.873 0.8150.374 0.55 2.642 1.05 0.5900 0.28 LC 10 Jul 2005 Feb 2008
(5381) Sekhmet NEA ATE 0.947 0.9220.296 1.0 2.7 1.54 0.521 0.30 R 8 May 2003 6 Jul 2003
(66063) 1998 RO1 NEA ATE 0.991 0.9860.720 0.8 2.492 1.2 0.6058 0.38 LC 13 Sep 200221 Oct 2002
(175706) 1996 FG3 NEA APO 1.054 1.0820.350 1.8 3.594 2.9 0.6723 0.51 LC 10 Dec 199826 Dec 1998
(88710) 2001 SL9 NEA APO 1.061 1.0930.270 1.0? 2.400 [1.6?] 0.6833 0.2? LC 2 Oct 2001 3 Nov 2001
(363027) 2000 CO101 NEA APO 1.076 1.1170.090 0.62 ? [0.6] [0.3?] 0.045 R 26 Sep 2009 2 Oct 2009
1994 AW1 NEA AMO 1.105 1.1610.075 0.94 2.519 [2.0?] 0.9304 0.46 LC Jan 1994 1994
(164121) 2003 YT1 NEA APO 1.110 1.1690.292 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 1.2130.144 1.0 2.624 3.3 1.360 0.42 LC 27 Feb 199729 Mar 1997
(185851) 2000 DP107
S/2000 (2000 DP107) 1
NEA APO 1.365 1.5960.377 0.8 2.774 2.62 1.758 0.3 R 22 Sep 2000 3 Oct 2000
(1862) Apollo NEA APO 1.470 1.7830.560 1.6 3.065 >3 [0.8?] 0.08 R 29 Oct 2005 4 Nov 2005
(363599) 2004 FG11 NEA APO 1.588 2.0010.724 0.15 ? 0.25 0.83 <0.08 R 7 Apr 201225 Apr 2012
(311066) 2004 DC NEA APO 1.634 2.0880.400 0.36 2.6 0.75 0.9583 0.07 R 2 Jun 2006 2 Jun 2006
(136617) 1994 CC NEA APO 1.638 2.0960.417 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 2.1090.384 0.75 2.259 1.18 0.4963 0.17 LC 20 Nov 200328 Nov 2003
(69230) Hermes NEA APO 1.655 2.1300.624 0.6 13.894 [1.1?] 0.5789 0.54 R 18 Oct 200320 Oct 2003
(162000) 1990 OS NEA APO 1.678 2.1740.463 0.30 ? >0.6 0.88 0.045 R 5 Nov 200310 Nov 2003
(153958) 2002 AM31 NEA APO 1.703 2.2230.452 0.72? 3.32 ? ? ? R 12 Jul 2012 Jul 2012
(51356) 2000 RY76 MCA 1.812 2.4390.112 3.2? 2.557 [13?] 2.5854 0.7? LC 8 Oct 2012 Mar 2013
(3309) Brorfelde MB 1.818 2.4500.053 6.1? 2.504 [11?] 0.7700 1.6? LC 25 Oct 2005 7 Nov 2005
2002 BM26 NEA AMO 1.833 2.4810.444 0.6 2.7 [1.4] 1.075 0.10 R 9 Feb 200211 Feb 2002
(5143) Heracles NEA APO 1.833 2.4830.772 3.6 2.706 [4] 0.646? 0.6 R 10 Dec 201113 Jul 2012
2008 DG17 NEA APO 1.838 2.4910.449 0.4? ? ? ? ? R Mar 2013 Mar 2013
(5407) 1992 AX MCA 1.838 2.4910.278 3.9 2.549 [6?] 0.5633 0.78 LC 7 Jan 1997 1997
2007 LE NEA APO 1.839 2.4930.517 0.5 ? [0.8] 0.54 0.18 R 31 May 2012 Jun 2012
(85938) 1999 DJ4 NEA APO 1.853 2.5220.484 0.43 2.514 [0.8?] 0.7388 0.21 LC 21 Feb 200423 Apr 2004
(1727) Mette MCA 1.854 2.5240.102 10.2 2.981 [21?] 0.875 2.0 LC 17 Jan 2013 5 Feb 2013
2006 GY2 NEA APO 1.858 2.5320.496 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 2.5340.070 4.5 2.521 250? [130?] 1.4 AOT 4 Mar 2004 5 Mar 2004
(1509) Esclangona
S/2003 (1509) 1
MB 1.866 2.5490.032 7.8 3.253 140? [21?] 2.6 AOT 13 Feb 200318 Feb 2003
(53432) 1999 UT55 MCA 1.871 2.5600.116 2.6? 3.330 [4?] 0.5875 0.6 LC 3 Jan 2013 Feb 2013
(2047) Smetana MB 1.872 2.5610.003 3.0 2.497 [6?] 0.9346 0.6 LC 31 Oct 2012 Mar 2013
(7958) Leakey MB 1.877 2.5720.077 5.0? 2.348 [20?] 2.10 1.6? LC 13 Jun 2012 Oct 2012
(2131) Mayall MB 1.887 2.5920.111 7.5 2.568 [16?] 0.9783 2.0 LC 30 Nov 200931 Dec 2009
(3169) Ostro MB 1.892 2.6020.067 3.9 6.509 5.2 0.2712 3.4 LC 5 Nov 200520 Dec 2005
(3873) Roddy MCA 1.892 2.6030.134 9.2? 2.480 [17?] 0.8017 2.5? LC 13 Aug 2012 Jan 2013
(1866) Sisyphus NEA APO 1.894 2.6060.538 8.5 2.700 ? ? ? R Dec 1985 Dec 2007
(52316) 1992 BD MB 1.897 2.6120.065 3.3? 2.763 [5?] 0.5598 0.5? LC 17 Dec 2012 Mar 2013
(1453) Fennia MB 1.897 2.6130.028 7.0 4.412 [15?] 0.9579 2.0 LC 4 Nov 2007 1 Dec 2007
(2577) Litva MCA 1.904 2.6280.138 7.2? 2.813 [21?] 1.495 2.5? LC 28 Feb 200911 Mar 2009
(5905) Johnson MB 1.910 2.6400.072 5.0 3.782 [10?] 0.9077 2.0 LC 1 Apr 200513 Apr 2005
(9069) Hovland MB 1.913 2.6460.118 3.0 4.218 [8?] 1.264 0.9 LC Oct 200416 Nov 2004
(5477) Holmes MB 1.917 2.6550.075 3.0 2.994 [7?] 1.018 1.1 LC 2 Nov 200515 Nov 2005
(26471) 2000 AS152 MCA 1.918 2.6570.154 7.1? 2.687 [22?] 1.637 2.6? LC 13 Jul 200920 Jul 2009
(4440) Tchantches MB 1.921 2.6620.077 ? 2.788 ? 0.779 ? LC 27 Sep 2005 Jul 2013
(8026) Johnmckay MB 1.925 2.6710.075 1.7 372. ? ? ? LC 2010
(5899) Jedicke MB 1.928 2.6780.117 2.5 3.5? [4.4?] 0.696 0.8 LC 25 Feb 2010
2000 UG11 NEA APO 1.929 2.6780.573 0.26 4.44 0.426 0.767 0.13 R 3 Nov 200010 Nov 2000
(76818) 2000 RG79 MB 1.930 2.6810.096 3.6 3.166 [6?] 0.5885 1.3 LC Aug 200530 Aug 2005
2003 SS84 NEA APO 1.931 2.6830.571 0.12 ? [0.3?] 1 0.06 R 4 Oct 200310 Oct 2003
(7187) Isobe MB 1.938 2.6980.086 5.5? 4.243 [19?] 1.3842 ? LC 26 Aug 2012 Jan 2013
(1139) Atami MCA 1.948 2.7180.255 6.0 27.45 >15 1.144 5.0 LC < Sep 2005 1 Sep 2005
(15822) 1994 TV15 MB 1.948 2.7190.080 1.7? 2.96 [5?] 1.55 ? LC 2010
2002 KK8 NEA AMO 1.952 2.7280.466 0.5 ? ? ? 0.10 R 8 Jun 200217 Jun 2002
(79472) 1998 AX4 MB 1.962 2.7480.080 3.8? 2.880 [8?] 1.08 1.1? LC 17 Mar 2012 Oct 2012
(27568) 2000 PT6 MB 1.963 2.7510.027 ? 3.488 ? 0.682 ? LC 11 Mar 2013 Jul 2013
(7088) Ishtar NEA AMO 1.981 2.7880.391 1.4? 2.679 [2.8?] 0.8604 0.6? LC 4 Dec 200531 Jan 2006
(153591) 2001 SN263 NEA AMO 1.987 2.8000.478 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 2.8610.391 0.9 2.516 [1.4?] 0.583? 0.3 LC 29 Aug 1998 1998
2005 NB7 NEA APO 2.044 2.9230.517 0.5 3.488 >0.6 0.6367 0.2 R 11 Apr 200817 Apr 2008
(5646) 1990 TR NEA AMO 2.143 3.1370.437 3.0? 3.200 [6?] 0.8113 0.5? LC 22 Nov 2012 Mar 2013
(6244) Okamoto MB 2.160 3.1740.152 6.7? 2.896 [13?] 0.8467 1.7? LC 26 Sep 200619 Oct 2006
(6265) 1985 TW3 MB 2.166 3.1880.193 4.8 2.709 [8?] 0.6608 1.2 LC 15 Jul 2007 2 Aug 2007
(6615) Plutarchos MB 2.170 3.1960.126 3.1 2.325 [10?] 1.668 ? LC 14 Apr 2007 Oct 2007
(2121) Sevastopol MB 2.184 3.2270.179 8.6 2.906 [26?] 1.546 3.5 LC 2010
(1830) Pogson MB 2.188 3.2370.056 7.9 2.570 [18?] 1.010 2.5 LC 18 Apr 200710 May 2007
(32008) 2000 HM53 MB 2.192 3.2460.193 4.2? 3.017 [13?] 1.677? 1.7? LC 5 Aug 200720 Sep 2007
(1717) Arlon MB 2.196 3.2530.129 9.1 5.148 [17?] 0.7598 ? LC 4 Dec 200517 Jan 2006
(3671) Dionysus
S/1997 (3671) 1
NEA APO 2.197 3.2580.542 1.43 2.705 3.4 1.155 0.3 LC 30 May 199710 Jun 1997
(17260) 2000 JQ58 MB 2.204 3.2730.183 4.6? 3.129 [7?] 0.6149 1.2? LC 29 Jan 200614 Mar 2006
2007 DT103 NEA APO 2.206 3.2760.575 0.3 2.703 0.45? [0.6?] >0.08 R 26 Jul 2007 3 Aug 2007
(15700) 1987 QD MCA 2.209 3.2820.316 4.2? 3.059 ? ? ? LC 2010
(1089) Tama MB 2.214 3.2940.127 10.7 16.444 20.7 0.6852 7.3 LC 24 Dec 200312 Jan 2004
2008 BT18 NEA APO 2.221 3.3110.595 0.6 2.726 1.5? [1.2?] >0.2 R 6 Jul 200829 Jul 2008
(15430) 1998 UR31 MB 2.222 3.3120.170 ? 2.527 ? 0.998 ? LC 22 Apr 2010 Jul 2013
(32039) 2000 JO23 MCA 2.223 3.3140.283 4.0? 6.598 [53?] 15 1.3? LC 3 Sep 200723 Nov 2007
(9617) Grahamchapman MB 2.224 3.3170.113 2.7 2.286 [5.2?] 0.8077 0.7 LC 27 Jan 2006 1 Mar 2006
(2478) Tokai MB 2.226 3.3210.069 8.1 25.885 [21?] 1.079 5.8 LC 20 Jan 200730 Jan 2007
(2754) Efimov MB 2.228 3.3260.232 6.5? 2.450 [10?] 0.6152 1.3? LC 14 Aug 2006 4 Sep 2006
(2815) Soma MB 2.234 3.3380.169 7.0 2.733 [13?] 0.7465 1.7 LC 2011
(276049) 2002 CE26 NEA APO 2.234 3.3380.559 3.46 3.293 4.7 0.65 0.3 R 30 Aug 2004 4 Sep 2004
(10208) Germanicus MB 2.235 3.3420.202 3.2 3.348 [13?] 2.440 1.5 LC 6 Aug 200725 Sep 2007
(1052) Belgica MB 2.236 3.3440.144 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 3.3460.109 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 3.3580.136 6.7? 3.447 [22?] 1.873 1.7? LC 11 Dec 2006 3 Jan 2007
(2691) Sersic MB 2.246 3.3650.112 5.0 3.881 [12?] 1.117 2.2 LC 2011
(939) Isberga MB 2.246 3.3660.178 10.99 2.917 [26?] 1.117 ? LC 26 Feb 2006 2007
(8116) Jeanperrin MB 2.250 3.3750.159 4.5 3.617 [13?] 1.506 1.5 LC 4 Oct 2007 9 Nov 2007
(34706) 2001 OP83 MCA 2.253 3.3810.383 3.5? 2.594 [7?] 0.865 1.0? LC 11 Dec 200529 Dec 2005
(4951) Iwamoto MB 2.257 3.3900.167 4.4 118.0 [30?] 4.917 3.5 LC 11 May 200711 May 2007
(114319) 2002 XD58 MCA 2.258 3.3920.274 2.6? 7.954 ? ? ? LC 25 Aug 200523 Dec 2005
(3982) Kastel MB 2.261 3.3990.218 6.8 5.835 ? ? ? LC 24 Sep 2005 1 Oct 2005
(4607) Seilandfarm MB 2.264 3.4070.019 7.1 3.968 [19?] 1.318 2.1 LC 17 Jan 200911 Mar 2009
(1338) Duponta MB 2.264 3.4070.113 7.7 3.855 [14?] 0.7321 1.8 LC 6 Mar 200727 Mar 2007
(2486) Metsahovi MB 2.268 3.4160.080 8.42 4.452 ? ? ? LC 12 Dec 200626 Feb 2007
(809) Lundia MB 2.284 3.4510.193 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 3.4580.085 18.7 8.169 257? [16?] 5.3 AOT 24 Nov 200926 Nov 2009
(9260) Edwardolson MB 2.291 3.4670.230 4.0 3.085 [7?] 0.741 1.1 LC 6 Oct 2005 2 Nov 2005
(99913) 1997 CZ5 MCA 2.294 3.4750.397 6.8? 2.835 [11?] 0.6117 1.3? LC 2011
(16635) 1993 QO MCA 2.298 3.4850.285 4.6? 7.622 [12?] 1.344 1.2? LC 2 Sep 200719 Nov 2007
(218144) 2002 RL66 MCA 2.305 3.5000.341 3.5? 587.0 ? ? ? LC 2010
(136993) 1998 ST49 NEA APO 2.310 3.5100.593 1.0? 2.301 ? ? ? R Oct 2012 Oct 2012
(6084) Bascom MB 2.312 3.5160.236 6.0 2.745 [20?] 1.813 2.2 LC 29 Dec 2005 6 Feb 2006
(3034) Climenhaga MB 2.324 3.5430.210 ? 2.737 ? 0.7898 ? LC 1 May 2009 Jul 2013
(2006) Polonskaya MB 2.325 3.5450.193 4.5 3.118 [8?] 0.7979 1.0 LC 1 Nov 200516 Nov 2005
(3703) Volkonskaya MB 2.331 3.5600.135 3.5 3.235 [8?] 1 1.4 LC 2005 Dec 2005
(3868) Mendoza MB 2.334 3.5670.098 9.1 2.771 [20?] 1.016 2.0 LC 25 Apr 2009 6 Jun 2009
(5481) Kiuchi MB 2.339 3.5770.063 7.5? 3.620 [15?] 0.8708 2.5? LC 13 Mar 200815 Apr 2008
(3951) Zichichi MB 2.339 3.5780.174 9.0? 3.394 [22?] 1.150 3.0? LC 2011
(7225) Huntress MB 2.341 3.5820.203 6.5 2.440 [10?] 0.6113 1.4 LC 7 Dec 200731 Jan 2008
(3673) Levy MB 2.346 3.5930.184 6.2 2.688 [13?] 0.900 1.7 LC 5 Dec 200712 Dec 2007
1994 XD NEA APO 2.348 3.5990.733 0.6 2.736 0.6? 0.749 >0.15 R 24 Jun 200511 Jul 2005
(4786) Tatianina MB 2.358 3.6200.193 3.2 2.923 [7?] 0.9029 0.6 LC 20 Mar 200611 Apr 2006
(15268) Wendelinefroger MB 2.366 3.6400.235 3.8? 2.422 [9?] 1.045 1.0? LC 24 Sep 200820 Oct 2008
(7369) Gavrilin MCA 2.370 3.6500.319 7.5? 49.12 [27?] 2.047 2.4? LC 2008
(854) Frostia MB 2.371 3.6500.173 6.4 37.728 [17?] 1.572 4.6 LC 17 Jul 2004 Aug 2004
(2044) Wirt MCA 2.381 3.6730.344 6.5 3.690 [12?] 0.7904 1.62 LC 8 Dec 2005 6 Jan 2006
(5474) Gingasen MB 2.384 3.6800.067 8.7? 3.624 ? ? ? LC 2008
2006 VV2 NEA APO 2.386 3.6860.605 1.8 2.41 1.5? [0.23?] >0.3 R 27 Mar 2007 5 Apr 2007
(16525) Shumarinaiko MB 2.399 3.7160.139 5.25 2.593 [8?] 0.6004 >0.83 LC 9 Jan 2013 Feb 2013
(3782) Celle MB 2.415 3.7520.095 5.4 3.839 [18?] 1.524 2.3 LC 18 Sep 2001 3 May 2003
(285263) 1998 QE2 NEA AMO 2.422 3.7680.571 2.7 4 6.4 1.3 0.6 R 29 May 201330 May 2013
(4383) Suruga MB 2.424 3.7740.064 6.5 3.407 [11?] 0.6828 >1.3 LC 1 Feb 2013 Feb 2013
(7888) 1993 UC NEA APO 2.436 3.8010.664 3.0? 2.340 ? ? ? R Feb 2013 Feb 2013
(6708) Bobbievaile MB 2.445 3.8230.182 8.0 8.221 [19?] 1.029 4.6 LC 16 Apr 2009 7 May 2009
(4029) Bridges MB 2.526 4.0150.131 7.8 3.575 [13?] 0.6796 1.9 LC 11 Apr 2006 8 May 2006
(11264) Claudiomaccone MB 2.579 4.1410.234 <4 3.187 6? 0.6296 >1.2 LC 4 Nov 2005 Dec 2005
(1333) Cevenola MB 2.633 4.2720.134 17 4.88 ? ? ? LC 200812 Oct 2008
(1313) Berna MB 2.655 4.3260.209 11 25.464 [25?] 1.061 8.4 LC 6 Feb 200423 Feb 2004
(45) Eugenia
S/2004 (45) 1
Petit-Prince
MB 2.720 4.4860.083 215 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 4.5730.141 142 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 4.5890.275 174 5.988 440? 1.1 <2 AOT 28 Mar 200831 Mar 2008
(4492) Debussy MB 2.765 4.5980.181 15 26.606 [31?] 1.109 9.4 LC 30 Oct 200215 Jun 2004
(216) Kleopatra
Cleoselene
Alexhelios
MB 2.795 4.6740.249 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 4.7880.021 4.5 ? 228 90 1.0 HST 14 Jan 200424 Feb 2004
(22899) 1999 TO14
S/2003 (22899) 1
MB 2.845 4.7980.081 5.5 4.030 182 56 1.2 HST 26 Jul 200326 Oct 2003
(243) Ida
Dactyl
MB 2.862 4.8420.042 60x25x19 4.634 108 1.54 1.6x1.4x1.2SP 28 Aug 199312 Mar 1994
(22) Kalliope
Linus
MB 2.909 4.9620.100 181 4.148 1,095 3.596 26 AOT 29 Aug 2001 3 Sep 2001
(283) Emma
S/2003 (283) 1
MB 3.047 5.3200.149 135 6.888 581 3.353 9.0 AOT 14 Jul 200327 Jul 2003
(130) Elektra
S/2003 (130) 1
MB 3.124 5.5230.209 182 5.225 1,318 5.258 7.0 AOT 15 Aug 200317 Aug 2003
(379) Huenna
S/2003 (379) 1
MB 3.137 5.5570.187 92 7.022 3,340 87.6 5.8 AOT 14 Aug 200315 Aug 2003
(762) Pulcova MB 3.157 5.6100.103 137 5.839 703 4.438 19 AOT 22 Feb 200024 Oct 2000
(90) Antiope
S/2000 (90) 1
MB 3.164 5.6270.159 88 16.505 171 0.6877 84 AOT 10 Aug 2000 3 Oct 2000
(702) Alauda
S/2007 (702) 1
MB 3.193 5.7070.020 195 8.354 1,227 4.914 3.4 AOT 26 Jul 2007 2 Aug 2007
2005 AB NEA AMO 3.218 5.7730.655 >1.9 3.339 [3.4?] 0.7471 0.46 LC Feb 200511 Feb 2005
(8373) Stephengould MB 3.281 5.9440.554 5? 4.435 [15?] 1.423 1.4? LC 4 Mar 2010
(121) Hermione
S/2002 (121) 1
MB 3.450 6.4080.135 240x150 5.551 747 2.563 32 AOT 28 Sep 200230 Sep 2002
(87) Sylvia
Remus
Romulus
MB 3.490 6.5210.089 286 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 6.5240.068 223 4.844 1,250 3.722 16 HST 1 Mar 200119 Mar 2001
(617) Patroclus
Menoetius
JTA L5 5.217 11.9160.140 106 103.2 680 4.283 98 AOT 22 Sep 200129 Oct 2001
(624) Hektor
S/2006 (624) 1
JTA L4 5.243 12.0060.024 363x207 6.923 1,200? [2.6?] 15 AOT 16 Jul 200621 Jul 2006
(17365) 1978 VF11 JTA L5 5.266 12.0860.079 33 12.672 [43?] 0.528 28 LC Apr 2005 Sep 2007
(29314) Eurydamas JTA L5 5.274 12.1110.073 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 200615 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 200729 Oct 2008
(38628) Huya TNO PLU 39.297 246.3 0.274 472 6.75 [1,700?] [2.6?] 248? HST 6 May 201212 Jul 2012
(134340) Pluto
Charon
Styx
Nix
Kerberos
Hydra
TNO*PLU 39.348 246.8 0.2472346 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 200527 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 0.5739117 LC 200412 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 200522 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 200619 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 200629 Sep 2006
2002 VT130 TNO CUB 42.691 278.9 0.030 186? ? [2,500?] [15?] 152? HST 200924 Sep 2009
2003 QY90 TNO CUB 42.723 279.3 0.053 81 3.4 8,550 309.7 80 IMG 23 Oct 200329 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 200522 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 200731 Aug 2007
(136108) Haumea
Namaka
Hi'iaka
TNO 43.058 282.5 0.1951960x1520x1000?3.91525,660
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 200622 Feb 2007
2001 XR254 TNO CUB 43.188 283.8 0.028 169 ? 9,310 125.6 140 HST 20 Dec 200614 Mar 2007
1999 XY143 TNO CUB 43.259 284.5 0.079 213? ? [2,700?] [14?] 179? HST 200924 Sep 2009
(119067) 2001 KP76 TNO 4:7 43.386 285.8 0.189 153? ? [8,900?] [130?] 146? HST 8 May 200719 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 200714 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 200115 Oct 2001
2006 BR284 TNO CUB 44.023 292.1 0.044 90 ? 25,300 1,501 71 IMG 200611 Aug 2011
2000 CF105 TNO CUB 44.051 292.4 0.041 64 ? 33,300 3,990 50 HST 12 Jan 200222 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 200827 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 200714 Mar 2007
2001 RZ143 TNO CUB 44.264 294.5 0.068 108? ? [1,600?] [17?] 90? HST < Mar 200714 Mar 2007
2003 QA91 TNO CUB 44.371 295.6 0.071 253? ? [1,900?] [6?] 242? HST < Mar 200714 Mar 2007
2003 WU188 TNO CUB 44.414 296.0 0.043 258? ? [1,300?] [4?] 187? HST < Mar 200714 Mar 2007
(148780) Altjira TNO CUB 44.491 296.8 0.058 164 ? 9,900 139.6 148 HST < Mar 200714 Mar 2007
(364171) 2006 JZ81 TNO CUB 44.595 297.8 0.078 122 ? 32,300 1,500 78 AOT 200611 Aug 2011
(123509) 2000 WK183 TNO CUB 44.673 298.6 0.050 106 ? 2,370 30.92 101 HST 24 Nov 200521 Feb 2007
2003 TJ58 TNO CUB 44.708 298.9 0.092 65 ? 3,770 137.3 51 HST 22 Nov 200614 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 200016 Apr 2001
(160091) 2000 OL67 TNO CUB 45.118 303.1 0.108 153? ? [7,800?] [120?] 116? HST 26 Jun 200719 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 200927 Sep 2009
(58534) Logos
Zoe
TNO CUB 45.276 304.7 0.123 82 ? 8,220 309.9 63 HST 17 Nov 200111 Feb 2002
1999 RY214 TNO CUB 45.378 305.7 0.183 125? ? [1,500?] [15?] 76? HST 200924 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 200510 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 200316 Feb 2004
2001 QC298 TNO CUB 46.336 315.4 0.124 243 ? 3,810 19.23 198 HST 4 Oct 200217 Dec 2002
2003 QR91 TNO CUB 46.476 316.8 0.181 163? ? [1,800?] [11?] 149? HST < Mar 200714 Mar 2007
2003 YU179 TNO CUB 47.065 322.9 0.165 146? ? [2,000?] [18?] 80? HST 200927 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 200124 Jan 2002
2000 QL251 TNO 1:2 47.873 331.2 0.217 148 ? 5,000 56.45 143 HST 25 Jul 200612 Sep 2006
(119979) 2002 WC19 TNO 1:2 48.225 334.9 0.265 440? ? [2,800?] [6?] 139? HST 5 Nov 200627 Feb 2007
(182933) 2002 GZ31 TNO SDO 50.248 356.2 0.238 195? ? [2,100?] [12?] 123? HST 23 Apr 200628 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 200618 Mar 2006
2006 SF369 TNO 1:3 63.161 502.0 0.381 144? ? [3,100?] [28?] 141? HST 13 Nov 200719 Feb 2008
(136199) Eris
Dysnomia
TNO*SDO 67.958 560.2 0.4372326 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 100.9811014.8 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:

Detection method for secondaries:

Other reports of asteroid/TNO companions


© 2001-2012, 2013 by Wm. Robert Johnston.
Last modified 13 July 2013.
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