341520 Mors–Somnus
341520 Mors–Somnus /ˌmɔːrs ˈsɒmnəs/, provisional designation 2007 TY430, is a binary and plutino. It consists of two components less than 60 kilometers in diameter, orbiting at a distance of 21000 km.
| Discovery | |
|---|---|
| Discovered by | S. S. Sheppard C. Trujillo |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 14 October 2007 |
| Designations | |
| (341520) Mors-Somnus | |
Named after | Mors and Somnus (Roman mythology) |
| 2007 TY430 | |
| TNO · Plutino | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 6.12 yr (2,235 days) |
| Aphelion | 49.184 AU |
| Perihelion | 28.839 AU |
| 39.012 AU | |
| Eccentricity | 0.2607 |
| 243.67 yr (89,000 days) | |
| 0.4680° | |
| 0° 0m 14.4s / day | |
| Inclination | 11.304° |
| 196.75° | |
| 205.32° | |
| Known satellites | 1 |
| Physical characteristics | |
| Dimensions | 102 km (derived) 175.20 km (calculated) <60 km (each component) |
Mean density | >0.5 g/cm3 |
| 9.28±0.05 h | |
| 0.10 (assumed) 0.23 | |
| B–V = 1.290±0.014 V–R = 0.740±0.010 V–I = 1.370±0.014 C | |
| 6.9 6.94±0.02 | |
Mors–Somnus was discovered on 14 October 2007, by American astronomers Scott Sheppard and Chad Trujillo with the Subaru telescope at Mauna Kea Observatories in Hawaii, United States. It was later named after the twins Mors and Somnus from Roman mythology.
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