Orbit Status of Known Binary TNOs

Color Key:
Known to
be binary
Some additional
astrometric data
Anchor pair
obtained
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 22.2 24.9 Full orbit
Huya (38628 2000 EB173) 3:2E+6:4II 15.5 5.2±0.2 20.0 21.6 Anchor pair plus
Typhon (42355 2002 CR46) CENTAURR 3.8 7.70±0.01 20.9 22.2 Full orbit
47171 (1999 TC36) 3:2E 6.7 5.35±0.02 20.3 22.5 Special case
48639 (1995 TL8) SCATNEAR 1.9 5.19±0.05 21.9 23.6 Some data
Quaoar (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 20.1 22.6 Full orbit
Logos (58534 1997 CQ29) CLASSICAL 2.0 7.28±0.05 24.1 24.6 Full orbit
60458 (2000 CM114) SCATNEAR 21.7 7.36±0.02 23.8 24.4 Anchor pair plus
60621 (2000 FE8) 5:2EEE 6.7 6.84±0.01 23.3 23.9 Some data
Ceto (65489 2003 FX128) CENTAURR 21.3 6.59±0.07 22.5 23.1 Mirror-ambiguous orbit
Borasisi (66652 1999 RZ253) SCATNEAR 1.6 6.04±0.02 22.8 23.3 Full orbit
Sila-Nunam (79360 1997 CS29) CLASSICAL 3.8 5.50±0.02 22.6 22.7 Full orbit
80806 (2000 CM105) CLASSICAL 2.1 7.0±0.5 24.0 24.0 Anchor pair plus
82075 (2000 YW134) 8:3EEEEE 16.7 4.72±0.03 21.4 23.7 Some data
82157 (2001 FM185) CLASSICAL 3.7 7.2±0.5 23.6 23.9 Discovery only
Teharonhiawako (88611 2001 QT297) CLASSICAL 4.2 6.1±0.5 23.1 23.8 Full orbit
Orcus (90482 2004 DW) 3:2E 21.2 2.284±0.009 19.2 21.8 Mirror-ambiguous orbit
119067 (2001 KP76) SCATNEAR 3.6 6.9±0.5 23.8 24.0 Some data
119979 (2002 WC19) 2:1E 7.7 5.2±0.5 21.4 24.5 Mirror-ambiguous orbit
Salacia (120347 2004 SB60) SCATEXTD 25.6 4.24±0.02 20.8 23.2 Mirror-ambiguous 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 (136199 2003 UB313) SCATEXTD 43.2 -1.158±0.003 18.7 25.4 Mirror-ambiguous orbit
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 24.0 24.6 Some data
160256 (2002 PD149) CLASSICAL 3.3 6.6±0.5 23.7 24.1 Some data
Varda (174567 2003 MW12) SCATEXTD 21.2 3.57±0.01 20.6 22.0 Full orbit
182933 (2002 GZ31) SCATNEAR 0.9 6.7±0.5 23.0 24.4 Anchor pair plus
208996 (2003 AZ84) 3:2E 15.6 3.72±0.01 20.3 25.3 Special case
229762 (2007 UK126) SCATNEAR 21.3 3.68±0.03 20.1 23.9 Some data
275809 (2001 QY297) CLASSICAL 1.0 5.91±0.07 22.9 23.2 Full orbit
303712 (2005 PR21) CLASSICAL 2.7 6.4±0.5 22.9 24.0 Anchor pair plus
341520 (2007 TY430) 3:2E 11.4 7.1±0.5 22.4 22.5 Mirror-ambiguous orbit
364171 (2006 JZ81) CLASSICAL 3.0 7.0±0.5 23.5 24.5 Full orbit
Manwe (385446 2003 QW111) 7:4EEE 1.1 7.44±0.05 24.2 25.4 Full orbit
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 Mirror-ambiguous orbit
1999 RT214 CLASSICAL 2.8 8.1±0.5 24.5 25.5 Some data
1999 RY214 SCATEXTD 14.9 7.7±0.5 23.7 24.8 Some data
1999 XY143 CLASSICAL 9.1 6.40±0.05 23.5 23.8 Discovery only
2000 CF105 CLASSICAL 1.4 8.0±0.1 24.7 25.4 Mirror-ambiguous orbit
2000 CQ114 CLASSICAL 2.2 7.2±0.1 24.6 24.7 Mirror-ambiguous orbit
2000 QL251 2:1E 5.8 7.15±0.02 23.8 24.0 Mirror-ambiguous orbit
2000 WT169 CLASSICAL 0.7 6.4±0.5 23.5 24.0 Some data
2001 FL185 CLASSICAL 2.1 7.4±0.5 23.9 25.0 Some data
2001 QC298 SCATEXTD 31.5 6.6±0.5 23.2 23.7 Full orbit
2001 QQ322 CLASSICAL 2.4 6.5±0.5 23.5 23.7 Some data
2001 QW322 CLASSICAL 3.5 8.1±0.5 25.4 25.4 Full orbit
2001 RZ143 CLASSICAL 2.4 6.4±0.5 23.1 23.5 Some data
2001 XP254 5:3EE 4.8 8.1±0.5 23.8 24.5 Discovery only
2001 XR254 CLASSICAL 2.7 6.03±0.03 23.0 23.5 Full orbit
2002 VF130 SCATEXTD 21.1 7.4±0.5 24.4 24.7 Discovery only
2002 VT130 CLASSICAL 2.8 6.1±0.5 23.0 23.4 Mirror-ambiguous orbit
2002 XH91 CLASSICAL 3.0 5.8±0.5 22.9 24.0 Some data
2003 FE128 2:1E 3.3 6.4±0.2 22.4 23.1 Discovery only
2003 HG57 CLASSICAL 1.7 6.8±0.5 23.8 23.8 Some data
2003 QA91 CLASSICAL 1.0 5.8±0.5 23.0 23.1 Anchor pair plus
2003 QR91 CLASSICAL 5.4 6.6±0.5 23.3 23.5 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 24.1 24.6 Mirror-ambiguous orbit
2003 WU188 CLASSICAL 2.1 6.0±0.5 22.8 23.5 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 24.4 24.7 Discovery only
2003 YU179 CLASSICAL 3.6 7.6±0.5 24.0 25.3 Discovery only
2004 PB108 SCATEXTD 19.2 7.04±0.03 23.6 25.0 Full orbit
2005 EF298 CLASSICAL 1.6 6.3±0.5 22.9 23.5 Full orbit
2005 EO304 CLASSICAL 1.7 6.6±0.5 23.2 24.6 Mirror-ambiguous orbit
2005 GD187 CLASSICAL 2.1 7.5±0.5 24.5 24.9 Discovery only
2005 VZ122 SCATNEAR 14.6 7.8±0.5 23.4 25.4 Discovery only
2006 BR284 CLASSICAL 1.8 7.2±0.5 23.9 24.4 Mirror-ambiguous orbit
2006 CH69 CLASSICAL 1.6 7.1±0.5 24.2 24.6 Full orbit
2006 SF369 3:1II 28.8 7.0±0.5 23.9 24.0 Discovery only

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 already 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.