(126154) 2001 YH140
Trans-neptunian object
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(126154) 2001 YH140 (provisional designation 2001 YH140) is a resonant trans-Neptunian object discovered on 18 December 2001, by American astronomers Chad Trujillo and Michael Brown at the Palomar Observatory in California. It measures approximately 345 kilometers in diameter.[4]
Discoverydate18 December 2001
(126154) 2001 YH140
| Discovery | |
|---|---|
| Discovered by | Michael E. Brown, Chadwick A. Trujillo[1] |
| Discovery date | 18 December 2001 |
| Designations | |
| (126154) 2001 YH140 | |
| TNO (3:5 resonance)[2] | |
| Orbital characteristics[1][3] | |
| 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° | |
| Known satellites | 0 |
| Physical characteristics | |
| Dimensions | 345 ± 45 km[4] |
| Mass | ~4.0Ã1019 kg |
| 13.25 h (0.552 d) | |
| 13.25 ± 0.2 h[5] | |
| 0.06â0.10[4] | |
| Temperature | ~42 K |
| 5.8,[4] 5.5[3] | |
Orbit and rotation
Physical characteristics
In 2010, thermal flux from 2001 YH140 in the far-infrared was measured by the Herschel Space Telescope. As a result, its size has been estimated to be 300â390 km (190â240 mi).[4]
