(303775) 2005 QU182
Trans-Neptunian object
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(303775) 2005 QU182 (provisional designation 2005 QU182) is a trans-Neptunian object in the scattered disk, estimated to be around 440 to 740 kilometres (270 to 460 miles) in diameter. It was discovered on 30 August 2005 by American astronomers Mike Brown, David Rabinowitz and Chad Trujillo at the Palomar Observatory in California.[1]
| Discovery[1] | |
|---|---|
| Discovered by | |
| Discovery site | Palomar Obs. |
| Discovery date | 30 August 2005 |
| Designations | |
| 2005 QU182 | |
| TNO (SDO)[2][3] | |
| Orbital characteristics[4] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 13642 days (37.35 yr) |
| Aphelion | 184.19 AU (27.554 Tm) (Q) |
| Perihelion | 36.827 AU (5.5092 Tm) (q) |
| 110.51 AU (16.532 Tm) (a) | |
| Eccentricity | 0.66675 (e) |
| 1161.74 yr (424325.7 d) | |
| 13.854° (M) | |
| 0° 0m 3.054s / day (n) | |
| Inclination | 14.032° (i) |
| 78.395° (Ω) | |
| 223.69° (Ï) | |
| Known satellites | 0 |
| Earth MOID | 35.8244 AU (5.35925 Tm) |
| Jupiter MOID | 31.769 AU (4.7526 Tm) |
| TJupiter | 6.711 |
| Physical characteristics | |
| 584+155 â144 km[5] 976 km[6] | |
| 9.61 h (0.400 d) | |
| 9.61 hr[4] | |
| 0.129+0.115 â0.046[5] | |
| 20.9[7] | |
| 3.75[4][2] 3.99±0.02[5] | |
Distance
2005 QU182 came to perihelion in 1971[4] and is currently 51.8 AU from the Sun.[7] In April 2013, it moved beyond 50 AU from the Sun.
As of 2025[update], it has been observed 583 times over 24 oppositions, with precovery images back to 1974.[8]
Physical characteristics
2005 QU182 has a bright absolute magnitude of 3.74.[4]
In 2012, the diameter of 2005 QU182 was initially estimated to be 416±73 km using data from the Herschel Space Telescope.[10] Later in 2020, the data was reanalyzed, which yielded a notably larger nominal diameter and uncertainty of 584+155
â144 km.[5]
