Asteroids/TNOs with Satellites: Summary Data

compiled by Wm. Robert Johnston
last updated 27 July 2014

(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 1.6 3.594 2.9 0.6723 0.45 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 5.12 [0.6] [0.3?] 0.045 R 26 Sep 2009 2 Oct 2009
(385186) 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 [0.6?] 0.08 R 29 Oct 2005 4 Nov 2005
1994 CJ1 NEA APO 1.489 1.8180.325 0.13? ? ? ? 0.13? R Jun 2014 Jul 2014
(363599) 2004 FG11 NEA APO 1.588 2.0010.724 0.15 <4.0 0.25 0.833 <0.08 R 7 Apr 201225 Apr 2012
(311066) 2004 DC NEA APO 1.634 2.0880.399 0.36 2.6 0.75 0.958 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
0.11
0.08
R
R
12 Jun 2009
12 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 2.1290.624 0.6 13.894 [1.1?] 0.5789 0.54 R 18 Oct 200320 Oct 2003
(162000) 1990 OS NEA APO 1.678 2.1750.462 0.30 2.536 >0.6 0.88 0.045 R 5 Nov 200310 Nov 2003
(153958) 2002 AM31 NEA APO 1.703 2.2230.452 0.45 2.817 1.5 1.096 0.11 R 12 Jul 2012 Jul 2012
(138095) 2000 DK79 NEA AMO 1.777 2.3680.414 2.2? 4.243 ? ? ? R 13 Nov 2013 Nov 2013
(26074) Carlwirtz MCA 1.811 2.4370.089 3.6? 2.459 [6?] 0.6713 ? LC 6 Jun 2013 Sep 2013
(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 1.817 2.4500.053 4.9? 2.504 [9?] 0.7700 1.3 LC 25 Oct 2005 7 Nov 2005
2002 BM26 NEA AMO 1.832 2.4810.444 0.6 2.7 [1.4?] 1.075 0.10 R 9 Feb 200211 Feb 2002
(5143) Heracles NEA APO 1.834 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 Feb 2013 Mar 2013
(5407) 1992 AX MCA 1.838 2.4930.278 3.9 2.549 [6?] 0.5633 0.8 LC 7 Jan 1997 1997
2007 LE NEA APO 1.839 2.4940.517 0.5 2.603 [1.4] 1.396 0.18 R 31 May 2012 Jun 2012
(69406) 1995 SX48 MB 1.844 2.5040.022 3.12 4.486 [5?] 0.6713 0.6 LC 26 Dec 2013 Mar 2014
(85938) 1999 DJ4 NEA APO 1.853 2.5230.484 0.43 2.514 [0.8?] 0.7388 0.21 LC 21 Feb 200423 Apr 2004
(1727) Mette MCA 1.854 2.5250.102 10.2 2.981 [21?] 0.875 2.1 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 2.5500.032 7.8 3.253 140? [23?] 2.6 AOT 13 Feb 200318 Feb 2003
(53432) 1999 UT55 MCA 1.872 2.5610.116 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 2.8 2.348 [10?] 2.10 0.8 LC 13 Jun 2012 Oct 2012
(2131) Mayall MB 1.887 2.5930.111 8.3 2.568 [18?] 0.9783 2.2 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 7.2 2.480 [14?] 0.8017 2.0 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
--
S/2012 (2577) 1
MCA 1.904 2.6280.138 4.0 2.813 [21?]
378
1.495
214
1.4
1.2
LC 28 Feb 200911 Mar 2009
(5905) Johnson MB 1.910 2.6400.072 4.4 3.782 [9?] 0.9077 1.8 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 2.6560.154 5.7 2.687 [18?] 1.637 2.0 LC 13 Jul 200920 Jul 2009
(4440) Tchantches MB 1.921 2.6630.077 2.0 2.788 [4?] 0.779 0.5 LC 27 Sep 2005 Jul 2013
(8026) Johnmckay MB 1.925 2.6720.075 1.7 372.0 ? ? ? LC 11 Jul 2010 6 Aug 2010
2000 UG11 NEA APO 1.928 2.6780.573 0.26 4.44 0.426 0.767 0.13 R 3 Nov 200010 Nov 2000
(5899) Jedicke MB 1.929 2.6790.117 2.5 2.75? [4.4?] 0.696 0.8 LC 2 Feb 201025 Feb 2010
(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 1.930 2.6820.571 0.12 ? [0.3?] 1.0? 0.06 R 4 Oct 200310 Oct 2003
(7187) Isobe MB 1.937 2.6970.086 6.0 4.243 [19?] 1.3842 ? LC 26 Aug 2012 Jan 2013
(11217) 1999 JC4 MB 1.944 2.7100.070 3.3? 4.822 [6?] 0.7988 ? LC 7 Jul 2013 Dec 2013
(4765) Wasserburg MB 1.945 2.7130.060 1.8 3.623 [3?] 0.6654 0.3 LC 23 Apr 2013 Sep 2013
(1139) Atami MCA 1.948 2.7180.256 6.0 27.45 >15 1.144 5.0 LC 31 Aug 2005 1 Sep 2005
(15822) 1994 TV15 MB 1.948 2.7190.080 1.7 2.96 [3.3?] 0.8388 0.3 LC 22 Jun 201020 Dec 2010
2002 KK8 NEA AMO 1.953 2.7300.466 0.5 ? ? ? 0.10 R 8 Jun 200217 Jun 2002
(79472) 1998 AX4 MB 1.962 2.7490.080 3.8? 2.880 [8?] 1.08 1.1? LC 17 Mar 2012 Oct 2012
(27568) 2000 PT6 MB 1.964 2.7510.028 1.8 3.488 [3.1?] 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 2.8010.478 2.6 3.425 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 2.015 2.8600.392 0.9 2.516 [1.4?] 0.583? 0.3 LC 29 Aug 1998 1998
(399774) 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 2.142 3.1350.437 2.7 3.200 [5?] 0.8113 0.5? LC 22 Nov 2012 Mar 2013
(6244) Okamoto MB 2.159 3.1730.153 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 3.1970.126 3.1 2.325 [10?] 1.668 ? LC 14 Apr 2007 Oct 2007
(2121) Sevastopol MB 2.183 3.2260.179 8.6 2.906 [26?] 1.546 3.5 LC 23 Jul 201026 Aug 2010
(1830) Pogson MB 2.189 3.2380.056 7.9 2.570 [18?] 1.010 2.5 LC 18 Apr 200710 May 2007
(32008) 2000 HM53 MB 2.192 3.2460.192 4.2? 3.017 [13?] 1.677? 1.7? LC 5 Aug 200720 Sep 2007
(1717) Arlon MB 2.196 3.2540.129 9.1 5.148 [17?] 0.7598 ? LC 4 Dec 200517 Jan 2006
(3671) Dionysus
S/1997 (3671) 1
NEA APO 2.198 3.2580.542 1.4 2.705 3.4 1.156 0.3 LC 30 May 199710 Jun 1997
(17260) 2000 JQ58 MB 2.205 3.2730.183 4.6? 3.129 [7?] 0.6149 1.2? LC 29 Jan 200614 Mar 2006
2007 DT103 NEA APO 2.206 3.2760.576 0.3 2.703 0.45? [0.6?] >0.08 R 26 Jul 2007 3 Aug 2007
(15700) 1987 QD MCA 2.208 3.2820.316 4.2? 3.059 ? ? ? LC 6 Sep 2010 6 Oct 2010
(1089) Tama MB 2.214 3.2940.128 10.7 16.444 20.7 0.6852 7.3 LC 24 Dec 200312 Jan 2004
(15430) 1998 UR31 MB 2.222 3.3120.170 3.7 2.527 [8?] 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
2008 BT18 NEA APO 2.223 3.3140.593 0.6 2.726 [1.5] [1.2?] >0.2 R 6 Jul 200829 Jul 2008
(9617) Grahamchapman MB 2.225 3.3180.113 2.7 2.286 [5.2?] 0.8077 0.7 LC 27 Jan 2006 1 Mar 2006
(2478) Tokai MB 2.225 3.3200.068 8.1 25.885 [21?] 1.079 5.8 LC 20 Jan 200730 Jan 2007
(2754) Efimov MB 2.229 3.3270.232 6.5? 2.450 [10?] 0.6152 1.3? LC 14 Aug 2006 4 Sep 2006
(2815) Soma MB 2.233 3.3360.169 7.0 2.733 [13?] 0.7465 1.7 LC 7 Mar 201121 Apr 2011
(276049) 2002 CE26 NEA APO 2.234 3.3390.559 3.5 3.293 4.7 0.65 0.3 R 30 Aug 2004 4 Sep 2004
(10208) Germanicus MB 2.235 3.3420.201 3.2 3.348 [13?] 2.440 1.5 LC 6 Aug 200725 Sep 2007
(1052) Belgica MB 2.236 3.3430.144 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 3.3450.109 4.0 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
(8306) Shoko MB 2.242 3.3570.220 3.2? 3.350 [9?] 1.508 1.3? LC Sep 201328 Dec 2013
(3073) Kursk MB 2.242 3.3580.137 6.7? 3.447 [22?] 1.873 1.7? LC 11 Dec 2006 3 Jan 2007
(2691) Sersic MB 2.244 3.3620.112 5.0 3.881 [12?] 1.117 2.2 LC 3 Jun 201116 Jul 2011
(939) Isberga MB 2.247 3.3680.178 11.0 2.917 [26?] 1.117 ? LC 26 Feb 2006 2007
(8116) Jeanperrin MB 2.250 3.3740.158 4.5 3.617 [13?] 1.506 1.5 LC 4 Oct 2007 9 Nov 2007
(34706) 2001 OP83 MCA 2.253 3.3820.383 3.5? 2.594 [7?] 0.865 1.0? LC 11 Dec 200529 Dec 2005
(114319) 2002 XD58 MCA 2.256 3.3890.275 2.6? 7.954 ? ? ? LC 25 Aug 200523 Dec 2005
(4951) Iwamoto MB 2.256 3.3900.167 4.4 118.0 [31?] 4.917 3.3 LC 11 May 200711 May 2007
(3982) Kastel MB 2.259 3.3950.219 6.8 5.835 ? ? ? LC 24 Sep 2005 1 Oct 2005
2013 WT44 NEA APO 2.260 3.3970.568 1.0 ? ? ? ? R 20 Mar 201422 Mar 2014
(1338) Duponta MB 2.264 3.4050.112 7.7 3.855 [14?] 0.7321 1.8 LC 6 Mar 200727 Mar 2007
(4607) Seilandfarm MB 2.264 3.4060.019 7.1 3.968 [19?] 1.318 2.1 LC 17 Jan 200911 Mar 2009
(2486) Metsahovi MB 2.268 3.4160.080 8.42 4.452 ? ? ? LC 12 Dec 200626 Feb 2007
(809) Lundia MB 2.282 3.4480.193 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 3.4580.086 19.9 8.169 257 [14?] 5.3 AOT 24 Nov 200926 Nov 2009
(9260) Edwardolson MB 2.289 3.4640.230 4.0 3.085 [7?] 0.741 1.1 LC 6 Oct 2005 2 Nov 2005
(99913) 1997 CZ5 MCA 2.294 3.4740.397 6.8? 2.835 [11?] 0.6117 1.3? LC 31 Dec 2010 3 Feb 2011
(16635) 1993 QO MCA 2.299 3.4850.284 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 Mar 2010 Jul 2010
(136993) 1998 ST49 NEA APO 2.310 3.5120.593 0.7 2.302 ? ? 0.08 R Oct 2012 Oct 2012
(6084) Bascom MB 2.313 3.5170.235 6.0 2.745 [20?] 1.813 2.2 LC 29 Dec 2005 6 Feb 2006
(2006) Polonskaya MB 2.324 3.5430.193 4.5 3.118 [8?] 0.7979 1.0 LC 1 Nov 200510 Nov 2005
(3034) Climenhaga MB 2.326 3.5460.209 10.0? 2.737 [19?] 0.7898 ? LC 1 May 2009 Jul 2013
(3703) Volkonskaya MB 2.331 3.5600.134 3.5 3.235 [8?] 1 1.4 LC 2005 Dec 2005
(3868) Mendoza MB 2.334 3.5650.098 9.1 2.771 [20?] 1.016 2.0 LC 25 Apr 2009 6 Jun 2009
(5481) Kiuchi MB 2.339 3.5780.063 7.5? 3.620 [15?] 0.8708 2.5 LC 13 Mar 200816 Apr 2008
(3951) Zichichi MB 2.340 3.5790.174 6.4 3.394 [16?] 1.150 2.1 LC 29 Nov 200614 Apr 2011
(7225) Huntress MB 2.341 3.5810.203 6.5 2.440 [10?] 0.6113 1.4 LC 7 Dec 200731 Jan 2008
(3673) Levy MB 2.345 3.5920.184 6.2 2.688 [13?] 0.900 1.7 LC 5 Dec 200712 Dec 2007
1994 XD NEA APO 2.347 3.5960.733 0.6 2.736 [0.6] 0.749 >0.15 R 24 Jun 200511 Jul 2005
(4786) Tatianina MB 2.358 3.6210.194 3.2 2.923 [7?] 0.9029 0.6 LC 20 Mar 200611 Apr 2006
(15268) Wendelinefroger MB 2.365 3.6370.235 3.8? 2.422 [9?] 1.045 1.0 LC 24 Sep 200820 Oct 2008
(854) Frostia MB 2.369 3.6450.174 6.4 37.728 [17?] 1.572 4.6 LC 17 Jul 2004 Aug 2004
(7369) Gavrilin MCA 2.370 3.6500.318 7.5? 49.12 [27?] 2.047 2.4 LC 28 Dec 2007 Oct 2008
(2044) Wirt MCA 2.380 3.6730.344 6.5 3.690 [12?] 0.7904 1.62 LC 8 Dec 2005 6 Jan 2006
(5474) Gingasen MB 2.383 3.6780.067 5.0 3.624 ? ? ? LC 7 Mar 2008 Oct 2008
(374851) 2006 VV2 NEA APO 2.386 3.6870.605 1.1 2.41 [1.5] [0.23?] >0.3 R 27 Mar 2007 5 Apr 2007
(16525) Shumarinaiko MB 2.400 3.7170.139 5.2 2.593 [8?] 0.6004 0.83 LC 9 Jan 2013 Feb 2013
(3782) Celle MB 2.417 3.7570.093 5.4 3.839 18 1.524 2.34 LC 18 Sep 2001 3 May 2003
(285263) 1998 QE2 NEA AMO 2.423 3.7730.571 3.0 4.751 6.21 1.304 0.75 R 29 May 201330 May 2013
(4383) Suruga MB 2.425 3.7750.064 6.3 3.407 [11?] 0.6828 1.3 LC 1 Feb 2013 Feb 2013
(7888) 1993 UC NEA APO 2.436 3.8020.664 2.7 2.340 ? ? ? R Mar 2013 Mar 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 2.525 4.0130.131 7.8 3.575 [13?] 0.6796 1.9 LC 11 Apr 2006 8 May 2006
(3905) Doppler MB 2.560 4.0960.258 6.3 50.8 [26?] 2.117 4.8 LC 20 Oct 201316 Dec 2013
(11264) Claudiomaccone MB 2.578 4.1380.234 <4 3.187 6 0.6296 >1.2 LC 4 Nov 2005 Dec 2005
(1333) Cevenola MB 2.632 4.2700.134 17.2 4.88 ? ? ? LC 200812 Oct 2008
(1313) Berna MB 2.656 4.3280.208 10.6 25.464 [25?] 1.061 8.4 LC 6 Feb 200423 Feb 2004
(45) Eugenia
S/2004 (45) 1
Petit-Prince
MB 2.720 4.4870.083 206 5.699 611.1
1,165.0
1.793
4.716
5
7
AOT
AOT
14 Feb 2004
1 Nov 1998
7 Mar 2007
20 Mar 1999
(93) Minerva
Gorgoneion
Aegis
MB 2.754 4.5710.141 142 5.982 375
624
1.115
2.406
3.2
3.6
AOT
AOT
16 Aug 2009
16 Aug 2009
31 Aug 2009
31 Aug 2009
(41) Daphne
S/2008 (41) 1
MB 2.761 4.5870.275 174 5.988 [440] 1.1 <2 AOT 28 Mar 200831 Mar 2008
(4492) Debussy MB 2.766 4.6000.180 14.6 26.606 [31?] 1.109 9.4 LC 30 Oct 200215 Jun 2004
(216) Kleopatra
Cleoselene
Alexhelios
MB 2.797 4.6770.249 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 2.839 4.7840.021 4.5 >5 228 90 1.0 HST 14 Jan 200424 Feb 2004
(22899) 1999 TO14
S/2003 (22899) 1
MB 2.844 4.7970.081 5.5 4.030 182 56 1.23 HST 26 Jul 200326 Oct 2003
(243) Ida
Dactyl
MB 2.862 4.8430.041 60x25x19 4.634 108 1.54 1.6x1.4x1.2SP 28 Aug 199312 Mar 1994
(22) Kalliope
Linus
MB 2.910 4.9650.100 166 4.148 1,095 3.596 28 AOT 29 Aug 2001 3 Sep 2001
(283) Emma
S/2003 (283) 1
MB 3.047 5.3190.148 135 6.888 581 3.353 9 AOT 14 Jul 200327 Jul 2003
(130) Elektra
S/2003 (130) 1
MB 3.123 5.5200.208 199 5.225 1,318 5.258 7 AOT 15 Aug 200317 Aug 2003
(379) Huenna
S/2003 (379) 1
MB 3.137 5.5560.186 87 7.022 3,340 87.6 5.8 AOT 14 Aug 200315 Aug 2003
(90) Antiope
S/2000 (90) 1
MB 3.164 5.6030.163 88 16.505 171 0.6877 84 AOT 10 Aug 2000 3 Oct 2000
(762) Pulcova MB 3.156 5.6070.103 142 5.839 703 4.438 19 AOT 22 Feb 200024 Oct 2000
(702) Alauda
Pichi unem
MB 3.192 5.7030.020 202 8.354 1,227 4.914 3.5 AOT 26 Jul 2007 2 Aug 2007
2005 AB NEA AMO 3.217 5.7710.655 >1.9 3.339 [3.4?] 0.7471 0.46 LC Feb 200511 Feb 2005
(8373) Stephengould MCA 3.280 5.9410.555 5.3? 4.435 [15?] 1.423 1.4? LC 16 Jan 2010 4 Mar 2010
(121) Hermione
S/2002 (121) 1
MB 3.450 6.4090.134 240x150 5.551 747 2.563 32 AOT 28 Sep 200230 Sep 2002
(87) Sylvia
Remus
Romulus
MB 3.482 6.4970.091 286 5.184 706
1,357
1.373
3.654
11
11
AOT
AOT
9 Aug 2004
18 Feb 2001
11 Aug 2005
23 Feb 2001
(107) Camilla
S/2001 (107) 1
MB 3.487 6.5120.067 219 4.844 1,250 3.722 16 HST 1 Mar 200119 Mar 2001
(617) Patroclus
Menoetius
JTA L5 5.217 11.9170.140 106 103.02 680 4.283 98 AOT 22 Sep 200129 Oct 2001
(624) Hektor
S/2006 (624) 1
JTA L4 5.249 12.0240.024 363x207 6.921 6,235 2.965 12 AOT 16 Jul 200621 Jul 2006
(17365) 1978 VF11 JTA L5 5.268 12.0900.079 32.6 12.672 [43?] 0.528 28 LC 9 Apr 2005 1 Jun 2007
(29314) Eurydamas JTA L5 5.280 12.1320.073 32 15.035 [41?] 0.6265 24 LC 14 Apr 2005 1 Jun 2007
(10199) Chariklo CEN 15.754 62.5320.172 248 ? ? ? ? OCC 3 Jun 201326 Mar 2014
1999 OJ4 TNO 37.915 233.5 0.026 75 ? 3,267 84.12 72 HST 4 Oct 2002 6 Oct 2005
(42355) Typhon
Echidna
CEN 38.108 235.2 0.540 162 9.67 1,628 18.971 89 HST 20 Jan 200615 Feb 2006
(82157) 2001 FM185 TNO 38.718 240.9 0.058 138? ? [3,100?] [33?] 120? HST 28 Nov 2008 2011
1998 WV24 TNO PLU 39.123 244.7 0.037 110? ? [1,400?] [14?] 96? HST 27 Aug 200729 Oct 2008
(341520) 2007 TY430 TNO PLU 39.323 246.6 0.267 102 ? 21,000 961.2 97 AOT 14 Oct 2007 1 Aug 2008
(139775) 2001 QG298 TNO PLU 39.363 247.0 0.193 135 13.774 172 0.5739117 LC 12 Sep 200312 Feb 2004
(38628) Huya TNO PLU 39.413 247.4 0.276 406 6.75 [1,700?] [3.2?] 213 HST 6 May 201212 Jul 2012
(90482) Orcus
Vanth
TNO PLU 39.439 247.7 0.219 917 13.188 9,006 9.539 276 HST 13 Nov 200527 Feb 2007
(134340) Pluto
Charon
Styx
Nix
Kerberos
Hydra
TNO*PLU 39.445 247.7 0.2502346 153.293 19,570
42,490
48,840
57,730
64,740
6.3872
20.16
24.855
32.17
38.202
1207
18
93
29
115
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
(47171) 1999 TC36
--
S/2001 (1999 TC36) 1
TNO PLU 39.472 248.0 0.226 272 45.763 867
7,411
1.907
50.38
251
132
HST
HST
Oct 2007
8 Dec 2001
Oct 2007
10 Jan 2002
(208996) 2003 AZ84 TNO PLU 39.680 250.0 0.174 723 13.44 [7,200] [12?] 72 HST 2 Dec 200522 Feb 2007
2004 KH19 TNO 40.761 260.2 0.119 179? ? [13,000] [210?] 129? IMG 12 Dec 2011
2005 VZ122 TNO CUB 41.497 267.3 0.182 124? ? [2,300] [30?] 49? HST 25 Sep 2008 2011
(120347) Salacia
Actaea
TNO CUB 41.962 271.8 0.106 854 ? 5,620 5.494 286 HST 21 Jul 200619 Sep 2006
(80806) 2000 CM105 TNO CUB 42.403 276.1 0.067 160? ? [2,700] [23?] 121? HST 5 Oct 2002 6 Oct 2005
1999 RT214 TNO CUB 42.413 276.2 0.044 100? ? [3,300] [64?] 69? HST 25 Jul 200629 Sep 2006
2001 XP254 TNO 3:5 42.564 277.7 0.224 108? ? [1,200] [12?] 77? HST 11 Nov 2008 2011
2002 VT130 TNO CUB 42.623 278.3 0.030 251 ? [2,500] [10?] 205 HST 21 Sep 200824 Sep 2009
2003 QY90 TNO CUB 42.626 278.3 0.055 81 3.4 8,550 309.7 80 IMG 23 Oct 200329 Oct 2003
(134860) 2000 OJ67 TNO CUB 42.713 279.2 0.020 138 ? 2,360 22.041 108 HST 25 Jun 2003 6 Oct 2005
(55637) 2002 UX25 TNO CUB 42.785 279.9 0.145 665 14.38? 4,770 8.309 210 HST 26 Aug 200522 Feb 2007
2003 UN284 TNO CUB 42.793 279.9 0.007 124 ? [56,000] 3,200 83 IMG 24 Oct 2003 5 Dec 2003
[hst5] TNO 42.9 281 0.0 135? ? [16,000] ? 135? HST 3 Aug 2005 1 Oct 2010
(160256) 2002 PD149 TNO CUB 42.903 281.0 0.064 186? ? [24,400] [470?] 155? HST 22 May 200731 Aug 2007
(136108) Haumea
Namaka
Hi'iaka
TNO* 43.166 283.6 0.1921960x1520x1000?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
2001 XR254 TNO CUB 43.215 284.1 0.029 171 ? 9,310 125.6 140 HST 20 Dec 200614 Mar 2007
(50000) Quaoar
Weywot
TNO CUB 43.219 284.1 0.0351070 8.839 13,800 12.26 81 HST 14 Feb 200622 Feb 2007
1999 XY143 TNO CUB 43.224 284.2 0.078 213? ? [2,700] [14?] 179? HST 19 Sep 200924 Sep 2009
2005 GD187 TNO CUB 43.253 284.5 0.015 123? ? [7,600] [150?] 102? HST 21 Jan 2009 2011
(119067) 2001 KP76 TNO 4:7 43.422 286.1 0.187 153? ? [8,900] [130?] 146? HST 8 May 200719 Feb 2008
(66652) Borasisi
Pabu
TNO CUB 43.616 288.1 0.085 126 ? 4,530 46.289 103 HST 23 Apr 2003 6 Jun 2003
(385446) Manwe
Thorondor
TNO 4:7 43.635 288.2 0.115 160 ? 6,670 110.176 92 HST 25 Jul 2006 7 Sep 2006
2003 HG57 TNO CUB 43.677 288.7 0.032 156? ? [13,200] [210?] 156? HST 22 Dec 2010 2012
(275809) 2001 QY297 TNO CUB 43.682 288.7 0.082 169 11.68 9,960 138.11 154 HST 18 Apr 200614 Mar 2007
2001 QW322 TNO CUB 43.846 290.3 0.026 128 ? 102,000 6,280 126 AOT 24 Aug 2001 9 Nov 2001
2003 YS179 TNO CUB 43.863 290.5 0.025 126? ? [7,800] [150?] 110? HST 2 Nov 2008 2011
(88611) Teharonhiawako
Sawiskera
TNO CUB 43.894 290.8 0.030 178 9.50? 27,700 828.8 129 IMG 11 Oct 200115 Oct 2001
2001 QQ322 TNO CUB 43.930 291.2 0.054 171? ? [3,900] [32?] 156? HST 15 Jun 2007 4 Mar 2008
(303712) 2005 PR21 TNO CUB 44.045 292.3 0.101 227? ? [3,600] [22?] 137? HST 20 May 2007 4 Mar 2008
2006 BR284 TNO CUB 44.098 292.8 0.046 90 ? 25,300 1,501 71 IMG 31 Jan 200611 Aug 2011
2001 RZ143 TNO CUB 44.125 293.1 0.065 108 ? [1,600] [17?] 90 HST 4 Sep 200514 Mar 2007
2000 CF105 TNO CUB 44.129 293.2 0.042 64 ? 33,300 3,990 50 HST 12 Jan 200222 Mar 2002
(79360) Sila-Nunam TNO CUB 44.133 293.2 0.016 249 ? 2,780 12.51 236 HST 22 Oct 2002 6 Oct 2005
2002 XH91 TNO CUB 44.182 293.7 0.084 298? ? [20,000] [190?] 185? HST 8 Nov 200827 May 2009
2003 QA91 TNO CUB 44.257 294.4 0.070 188 ? [1,900] [9?] 180 HST 19 Jun 200614 Mar 2007
2005 EF298 TNO CUB 44.262 294.5 0.094 138? 9.65 [3,300] [38?] 105? HST 21 Jan 2009 2011
2001 FL185 TNO CUB 44.326 295.1 0.080 142? ? [1,900] [17?] 88? HST 24 Jan 200614 Mar 2007
(148780) Altjira TNO CUB 44.401 295.9 0.058 246 ? 9,900 139.56 221 HST 6 Aug 200614 Mar 2007
2003 WU188 TNO CUB 44.410 296.0 0.042 178 ? [1,300] [6?] 129 HST < Mar 200714 Mar 2007
(123509) 2000 WK183 TNO CUB 44.619 298.0 0.050 106 ? 2,370 30.917 101 HST 24 Nov 200521 Feb 2007
2003 TJ58 TNO CUB 44.649 298.4 0.090 65 ? 3,770 137.3 51 HST 22 Nov 200614 Mar 2007
(364171) 2006 JZ81 TNO CUB 44.723 299.1 0.081 122 ? 32,300 1,500 78 AOT 1 May 200611 Aug 2011
1998 WW31
S/2000 (1998 WW31) 1
TNO CUB 44.816 300.0 0.082 148 ? 22,620 587.3 123 IMG 22 Dec 200016 Apr 2001
(160091) 2000 OL67 TNO CUB 44.992 301.8 0.107 153? ? [7,800] [120?] 116? HST 26 Jun 200719 Feb 2008
2004 PB108 TNO CUB 45.025 302.1 0.110 243 ? 10,400 97.02 132 HST 4 Aug 2006 3 Mar 2007
2000 WT169 TNO CUB 45.121 303.1 0.009 205? ? [2,600] [14?] 168? HST 24 Sep 200827 Sep 2009
1999 RY214 TNO CUB 45.224 304.1 0.180 125? ? [1,500] [15?] 76? HST 20 Sep 200824 Sep 2009
(58534) Logos
Zoe
TNO CUB 45.443 306.3 0.124 82 ? 8,220 309.9 67 HST 17 Nov 200111 Feb 2002
(174567) Varda
Ilmare
TNO CUB 45.634 308.3 0.142 705 11.8 [4,200] [5?] 361 HST 26 Apr 2009 2011
2005 EO304 TNO CUB 45.734 309.3 0.068 152 ? 69,800 3,580 78 IMG 15 Apr 200510 Mar 2005
2002 VF130 TNO CUB 46.024 312.2 0.117 121? ? [22,400] [760?] 105? HST 3 Nov 2008 3 May 2009
2006 CH69 TNO CUB 46.045 312.4 0.042 100 ? 27,000 1,421 82 AOT 17 Dec 2004 5 Aug 2010
2001 QC298 TNO CUB 46.191 313.9 0.122 235 ? 3,810 19.23 192 HST 4 Oct 200217 Dec 2002
2000 CQ114 TNO CUB 46.323 315.3 0.115 132? ? [5,900] [90?] 115? HST 6 Jun 200316 Feb 2004
2003 QR91 TNO CUB 46.376 315.8 0.180 207 ? [1,800] [8?] 189 HST < Mar 200714 Mar 2007
2003 YU179 TNO CUB 47.111 323.4 0.165 146? ? [2,000] [18?] 80? HST 27 Sep 200827 Sep 2009
(26308) 1998 SM165
S/2001 (26308) 1
TNO 1:2 47.675 329.2 0.369 268 8.4 11,370 130.2 81 HST 22 Dec 200124 Jan 2002
2000 QL251 TNO 1:2 47.695 329.4 0.214 148 ? 5,000 56.45 143 HST 25 Jul 200612 Sep 2006
2003 FE128 TNO 1:2 47.949 332.0 0.253 178? ? [2,100] [14?] 131? HST 26 Jun 2010 2012
(119979) 2002 WC19 TNO 1:2 48.182 334.5 0.265 440? ? [2,800] [6?] 139? HST 5 Nov 200627 Feb 2007
(182933) 2002 GZ31 TNO SDO 50.378 357.6 0.239 195? ? [2,100] [12?] 123? HST 23 Apr 200628 Feb 2007
(48639) 1995 TL8 TNO 52.560 381.1 0.236 176 ? [420] [1.4?] 80 HST 9 Nov 2002 6 Oct 2005
(60621) 2000 FE8 TNO 2:5 55.580 414.4 0.406 146? ? [1,200] [8?] 111? HST 15 Jan 2007 3 Mar 2007
(82075) 2000 YW134 TNO 3:8 58.340 445.6 0.294 216 ? [1,900] [10?] 75 HST 25 Oct 2002 6 Oct 2005
(60458) 2000 CM114 TNO SDO 59.923 463.9 0.407 167? ? [2,200] [15?] 128? HST 16 Jan 200618 Mar 2006
2006 SF369 TNO 1:3 62.893 498.8 0.378 144? ? [3,100] [28?] 141? HST 13 Nov 200719 Feb 2008
(136199) Eris
Dysnomia
TNO*SDO 67.836 558.7 0.4402326 25.92 37,600 15.79 514 AOT 10 Sep 2005 2 Oct 2005
(229762) 2007 UK126 TNO SDO 74.158 638.6 0.494 590 ? [3,600] [6?] 103 HST 13 Nov 2008 2011
(65489) Ceto
Phorcys
CEN 101.9031028.7 0.825 223 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


© 2001-2013, 2014 by Wm. Robert Johnston.
Last modified 27 July 2014.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.