(126154) 2001 YH140
| Discovery | |
|---|---|
| Discovered by |
Michael E. Brown, Chadwick A. Trujillo |
| Discovery date | 18 December 2001 |
| Designations | |
| MPC designation | (126154) 2001 YH140 |
| TNO (3:5 resonance) | |
| Orbital characteristics | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 4777 days (13.08 yr) |
| Aphelion | 48.725 AU (7.2892 Tm) |
| Perihelion | 36.428 AU (5.4496 Tm) |
| 42.577 AU (6.3694 Tm) | |
| Eccentricity | 0.14441 |
| 277.82 yr (101475 d) | |
| 19.455° | |
| 0° 0m 12.772s / day | |
| Inclination | 11.069° |
| 108.84° | |
| 356.62° | |
| Earth MOID | 35.4449 AU (5.30248 Tm) |
| Jupiter MOID | 31.219 AU (4.6703 Tm) |
| Jupiter Tisserand parameter | 5.678 |
| Physical characteristics | |
| Dimensions | 345 ± 45 km |
| Mass | ~4.0×1019 kg |
| 13.25 h (0.552 d) | |
|
Sidereal rotation period
|
13.25 ± 0.2 h |
| 0.06–0.10 | |
| Temperature | ~42 K |
| 5.8, 5.5 | |
(126154) 2001 YH140, also written as (126154) 2001 YH140, is a resonant trans-Neptunian object discovered on December 18, 2001 by C. A. Trujillo, M. E. Brown.
(126154) 2001 YH140 is locked in 3:5 mean-motion resonance with Neptune. When it makes three revolutions around the Sun, Neptune makes exactly five. The rotation period of (126154) 2001 YH140 is estimated to be 13.25 ± 0.2 hours.
In 2010 thermal flux from (126154) 2001 YH140 in the far-infrared was measured by the Herschel Space Telescope. As a result, its size has been estimated to be 300–390 km (190–240 mi).
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