Table 1
TNOs in a 3/1 MMR with Neptune for at least 100 Myr.
| TNO | Type | Resonant angle | Libration centre (deg) | Libration ampl. (deg) | Libration period (kyr) | a (au) | e | I (deg) | λ (deg) | ϖ (deg) | Ω (deg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2000 SS331 | S | σ0 | 78.4 | 40.4 | 19.1 | 62.771 | 0.514 | 2.984 | 272.899 | 272.990 | 146.809 |
 |
C | σ0 | 180.0 | 165.2 | – | 62.135 | 0.478 | 20.104 | 1.740 | 342.235 | 238.346 |
| 2004 VU130 | S | σ0 | 180.0 | 158.8 | 44.6 | 62.262 | 0.429 | 8.0236 | 325.186 | 271.547 | 42.958 |
 |
S | all | 70.5 | 31.1 | 18.2 | 62.431 | 0.500 | 22.041 | 17.679 | 9.271 | 24.813 |
| 2014 FX71 | C | σ0 | 221.4 | 158.8 | – | 62.517 | 0.459 | 17.726 | 225.553 | 193.391 | 275.858 |
| 2014 SK404 | S | σ0 | 76.4 | 29.1 | 23.9 | 62.524 | 0.415 | 26.162 | 254.756 | 243.124 | 128.143 |
| 2014 SR373 | S | σ0 | 71.7 | 22.4 | 27.9 | 62.486 | 0.383 | 35.583 | 232.502 | 214.479 | 165.746 |
| 2015 GA55 | S | σ0 | 261.2 | 62.5 | 35.6 | 62.625 | 0.387 | 17.958 | 204.417 | 214.371 | 29.045 |
 |
S | σ0 | 273.5 | 44.2 | 24.4 | 62.656 | 0.436 | 8.996 | 119.677 | 135.324 | 152.811 |
| 2015 RA278 | S | σ0 | 86.6 | 43.7 | 23.5 | 62.623 | 0.428 | 11.344 | 140.300 | 112.388 | 202.01 |
| 2015 RZ277 | S | σ0 | 180.0 | 168.5 | 38.1 | 62.247 | 0.445 | 5.827 | 127.120 | 45.786 | 194.182 |
| 2015 UH87 | C | σ0 | 157.9 | 155.1 | – | 62.613 | 0.449 | 12.098 | 260.861 | 11.783 | 98.258 |
| 2015 VN166 | S | σ0 | 76.4 | 31.4 | 20.2 | 62.716 | 0.481 | 6.030 | 146.592 | 119.125 | 227.357 |
| 2016 SO56 | S | σ0 | 74.7 | 14.0 | 24.5 | 62.602 | 0.396 | 16.306 | 204.431 | 174.026 | 164.311 |
| 2019 GZ129 | S | σ0 | 180.0 | 164.4 | 46.7 | 62.224 | 0.367 | 8.523 | 49.577 | 348.889 | 117.442 |
Notes. TNOs that are shown in Fig. 2 are marked with an asterisk. The ‘S’ stands for stable resonance (the libration frequency can be isolated from other perturbations), while ‘C’ indicates that the libration angle displays strong chaotic behaviour. We show the barycentric osculating orbital elements at the epoch JD2460000.5.
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