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(613100) 2005 TN74 (provisional designation 2005 TN74) is a trans-Neptunian object (TNO)[2] in a 3:5 resonance with Neptune.[3][4] It was discovered by Scott S. Sheppard and Chadwick A. Trujillo in 2005.
| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard, Chad Trujillo |
| Discovery date | 8 October 2005 |
| Designations | |
| 2005 TN74 | |
| 3:5 resonant TNO | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 1805 days (4.94 yr) |
| Aphelion | 52.49343 AU (7.852905 Tm) |
| Perihelion | 32.11131 AU (4.803784 Tm) |
| 42.30237 AU (6.328344 Tm) | |
| Eccentricity | 0.24091 |
| 275.14 yr (100495 d) | |
| 351.03607° | |
| 0° 0m 12.896s /day | |
| Inclination | 2.17385° |
| 179.25692° | |
| 224.79728° | |
| Earth MOID | 31.1197 AU (4.65544 Tm) |
| Jupiter MOID | 27.1241 AU (4.05771 Tm) |
| Physical characteristics | |
| Dimensions | 85–240 km |
| 7.3[1] | |
It was initially suspected of being a Neptune trojan since the first observations gave it a semi-major axis of 30 AU and an orbital eccentricity of 0.16,[5] but further observations showed it to have a semi-major axis of 42.7 AU, a perihelion of 32.1 AU, and an aphelion of 53.4 AU.[1]
With an absolute magnitude of 7.2,[1] it has an expected diameter in the range of 85 to 240 km.[6]
It has been observed 19 times over four oppositions.[1]
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