Orbit Status of Known Binary TNOs

Color Key:
Known to
be binary
Some additional
astrometric data
Almost
solved
P, a, and e known, but
ambiguous orientation
Full orbit
solution

Object DES Class i HV (combined) V1 V2 Orbit status
26308 (1998 SM165) 2:1E+6:3EII 13.1 6.1±0.1 22.4 25.1 Full orbit
Huya (38628 2000 EB173) 3:2E+6:4II 15.5 5.2±0.2 20.0 21.6 Almost solved
Typhon and Echidna (42355 2002 CR46) CENTAURR 3.8 7.70±0.01 21.5 22.8 Full orbit
Lempo (47171 1999 TC36) 3:2E 6.7 5.35±0.02 20.3 22.6 Special case
48639 (1995 TL8) SCATNEAR 1.9 5.19±0.05 22.0 23.7 Some data
Quaoar and Weywot (50000 2002 LM60) CLASSICAL 8.5 2.737±0.008 19.1 24.7 Mirror-ambiguous orbit
55637 (2002 UX25) SCATEXTD 20.2 3.88±0.01 20.0 22.5 Full orbit
Logos and Zoe (58534 1997 CQ29) CLASSICAL 2.0 7.28±0.05 24.2 24.6 Full orbit
60458 (2000 CM114) SCATNEAR 21.7 7.36±0.02 23.7 24.3 Full orbit
60621 (2000 FE8) 5:2EEE 6.7 6.84±0.01 23.5 24.1 Some data
Ceto and Phorcus (65489 2003 FX128) CENTAURR 21.5 6.59±0.07 23.1 23.6 Mirror-ambiguous orbit
Borasisi and Pabu (66652 1999 RZ253) CLASSICAL 1.6 6.04±0.02 22.8 23.3 Full orbit
Sila and Nunam (79360 1997 CS29) CLASSICAL 3.8 5.50±0.02 22.6 22.7 Full orbit
80806 (2000 CM105) CLASSICAL 2.2 6.9±0.5 24.0 24.0 Almost solved
82075 (2000 YW134) 8:3EEEEE 16.7 4.72±0.03 21.5 23.8 Some data
82157 (2001 FM185) CLASSICAL 3.7 7.2±0.5 23.6 23.9 Some data
Teharonhiawako and Sawiskera (88611 2001 QT297) CLASSICAL 4.2 6.1±0.5 23.1 23.8 Full orbit
Orcus and Vanth (90482 2004 DW) 3:2E 21.2 2.284±0.009 19.2 21.8 Full orbit
119067 (2001 KP76) SCATNEAR 3.6 6.9±0.5 23.7 23.9 Some data
119979 (2002 WC19) 2:1E 7.7 5.0±0.5 21.1 24.2 Mirror-ambiguous orbit
Salacia and Actaea (120347 2004 SB60) SCATEXTD 25.6 4.24±0.02 20.9 23.2 Full orbit
123509 (2000 WK183) CLASSICAL 2.7 6.67±0.02 23.7 23.8 Mirror-ambiguous orbit
134860 (2000 OJ67) CLASSICAL 1.3 6.47±0.02 23.3 23.9 Mirror-ambiguous orbit
Eris and Dysnomia (136199 2003 UB313) SCATNEAR 43.2 -1.158±0.003 18.7 25.4 Full orbit
Makemake (136472 2005 FY9) SCATEXTD 27.6 0.012±0.006 17.2 25.0 Special case
139775 (2001 QG298) 3:2E 6.2 7.3±0.2 23.1 23.1 Special case
Altjira (148780 2001 UQ18) CLASSICAL 5.5 6.32±0.07 23.6 23.8 Full orbit
160091 (2000 OL67) CLASSICAL 3.5 7.1±0.5 24.1 24.6 Mirror-ambiguous orbit
160256 (2002 PD149) CLASSICAL 3.3 6.6±0.5 23.7 24.1 Full orbit
Varda and Ilmarë (174567 2003 MW12) SCATEXTD 21.2 3.57±0.01 20.5 22.0 Mirror-ambiguous orbit
182933 (2002 GZ31) SCATNEAR 0.9 6.7±0.5 23.0 24.3 Almost solved
208996 (2003 AZ84) 3:2E 15.6 3.72±0.01 20.2 25.2 Special case
225088 (2007 OR10) 10:3EEEEEEE 34.7 2.1±0.5 21.6 25.8 Mirror-ambiguous orbit
Gǃkúnǁ’hòmdímà and Gǃò’é ǃhú (229762 2007 UK126) SCATNEAR 21.8 3.68±0.03 19.9 23.7 Full orbit
275809 (2001 QY297) CLASSICAL 1.0 5.91±0.07 23.0 23.2 Full orbit
303712 (2005 PR21) CLASSICAL 2.7 6.5±0.5 23.1 24.2 Mirror-ambiguous orbit
Mors and Somnus (341520 2007 TY430) 3:2E 11.5 6.9±0.5 22.2 22.3 Full orbit
364171 (2006 JZ81) CLASSICAL 3.0 7.0±0.5 23.5 24.5 Full orbit
Manwë and Thorondor (385446 2003 QW111) 7:4EEE 1.1 7.44±0.05 24.1 25.3 Full orbit
469420 (2001 XP254) 5:3EE 6.9 7.7±0.5 23.3 24.1 Discovery only
469505 (2003 FE128) 2:1E 3.4 6.4±0.2 22.4 23.1 Discovery only
469514 (2003 QA91) CLASSICAL 1.0 5.9±0.5 23.1 23.2 Mirror-ambiguous orbit
ǂKá̦gára and ǃHãunu (469705 2005 EF298) CLASSICAL 1.6 6.2±0.5 22.8 23.3 Full orbit
505447 (2013 SQ99) CLASSICAL 2.3 6.7±0.5 24.2 24.2 Special case
506121 (2016 BP81) CLASSICAL 3.5 6.5±0.5 23.5 23.7 Some data
508788 (2000 CQ114) CLASSICAL 2.2 7.2±0.1 24.6 24.7 Full orbit
508869 (2002 VT130) CLASSICAL 2.8 6.0±0.5 22.9 23.3 Mirror-ambiguous orbit
511551 (2014 UD225) CLASSICAL 4.8 7.0±0.5 24.3 24.3 Special case
523624 (2008 CT190) 7:3EEEE 36.9 6.1±0.5 22.3 22.3 Some data
1998 WV24 CLASSICAL 1.9 7.45±0.08 24.0 24.3 Some data
1998 WW31 CLASSICAL 8.3 6.5±0.5 23.8 24.2 Full orbit
1999 OJ4 CLASSICAL 2.6 7.35±0.02 23.8 23.9 Full orbit
1999 RT214 CLASSICAL 2.8 8.1±0.5 24.5 25.5 Full orbit
1999 RY214 SCATEXTD 14.8 7.7±0.5 23.7 24.8 Some data
1999 XY143 CLASSICAL 9.1 6.40±0.05 23.5 23.9 Some data
2000 CF105 CLASSICAL 1.4 8.0±0.1 24.7 25.4 Mirror-ambiguous orbit
2000 QL251 2:1E 5.8 7.15±0.02 23.9 24.1 Full orbit
2000 WT169 CLASSICAL 0.7 6.5±0.5 23.6 24.0 Some data
2001 FL185 CLASSICAL 2.1 7.4±0.5 24.0 25.0 Some data
2001 QC298 SCATEXTD 31.5 6.6±0.5 23.2 23.7 Full orbit
2001 QQ322 CLASSICAL 2.4 6.6±0.5 23.6 23.7 Some data
2001 QW322 CLASSICAL 3.5 8.1±0.5 25.4 25.4 Full orbit
2001 RZ143 CLASSICAL 2.4 6.8±0.5 23.5 23.9 Some data
2001 XR254 CLASSICAL 2.7 6.03±0.03 23.0 23.4 Full orbit
2002 VD131 CLASSICAL 1.0 6.9±0.5 24.1 24.1 Special case
2002 VF130 SCATEXTD 21.1 7.2±0.5 24.3 24.6 Discovery only
2002 XH91 CLASSICAL 3.0 5.8±0.5 22.9 23.9 Full orbit
2003 HG57 CLASSICAL 1.7 6.8±0.5 23.8 23.8 Some data
2003 QR91 CLASSICAL 5.4 6.6±0.5 23.4 23.6 Some data
2003 QY90 CLASSICAL 2.2 6.93±0.03 24.2 24.2 Full orbit
2003 TJ58 CLASSICAL 1.3 7.45±0.03 24.2 24.7 Full orbit
2003 WU188 CLASSICAL 2.1 6.1±0.5 22.9 23.6 Some data
2003 UN284 CLASSICAL 2.1 7.7±0.5 24.4 25.3 Full orbit
2003 YS179 CLASSICAL 2.0 7.3±0.5 24.3 24.6 Discovery only
2003 YU179 CLASSICAL 3.7 7.6±0.5 23.9 25.3 Discovery only
2004 KB19 3:2E 14.2 8.0±0.5 24.2 24.4 Discovery only
2004 PB108 SCATEXTD 19.2 7.04±0.03 23.6 24.9 Full orbit
2005 EO304 CLASSICAL 1.7 6.4±0.5 23.0 24.5 Full orbit
2005 GD187 CLASSICAL 2.1 7.5±0.5 24.5 24.9 Discovery only
2005 SF278 7:4EEE 11.2 7.1±0.5 23.2 23.5 Discovery only
2005 VZ122 SCATNEAR 14.7 7.6±0.5 23.3 25.3 Some data
2006 BR284 CLASSICAL 1.8 7.2±0.5 23.9 24.4 Full orbit
2006 CH69 CLASSICAL 1.6 7.1±0.5 24.2 24.6 Full orbit
2006 SF369 3:1II 27.9 7.0±0.5 24.0 24.1 Some data
2013 FY27 SCATNEAR 33.0 3.3±0.5 22.4 25.4 Some data
2014 LQ28 SCATNEAR 3.5 6.1±0.5 22.7 23.1 Some data
2015 QL14 SCATNEAR 11.4 7.4±0.5 24.2 24.4 Special case

Notes:

For consistency, these orbit solutions are all products of our orbit-fitting code applied to the available astrometry for each binary system (click the object links to see the astrometry). This occasionally results in somewhat different solutions from what has appeared in the literature.

Pluto and Haumea were excluded from this list because those two much more dynamically complex systems are being extensively studied by other groups (see, for example here and here).

Additional binaries are also excluded here, if the identities of the objects have not yet been made public.