42355 Typhon
| Discovery | |
|---|---|
| Discovered by | NEAT |
| Discovery date | February 5, 2002 |
| Designations | |
|
Named after
|
Typhon |
| 2002 CR46 | |
| Scattered disc[1][2] 7:10 resonance |
|
| Adjectives | Typhonean, Typhonian |
| Orbital characteristics | |
| Aphelion | 58.799297 AU |
| Perihelion | 17.525714 AU |
| 38.162506 AU | |
| Eccentricity | 0.5407609 |
| 359.6998644° | |
| Inclination | 2.4280935° |
| 351.9923803° | |
| 159.0020803° | |
| Physical characteristics | |
| Dimensions | 162±7 km[4] 134±13 km[citation needed] |
| Albedo | 0.044±0.003[4] 0.10±0.02 |
|
Spectral type
|
B−V=0.74±0.02 V−R=0.52±0.01 |
| 7.65±0.01 | |
42355 Typhon (/ˈtaɪfɒn/; from Greek: Τυφών) is a scattered disc object that was discovered on February 5, 2002, by the NEAT program. It measures 162±7 km in diameter, and is named after Typhon, a monster in Greek mythology.
A large moon was identified in 2006. It is named Echidna—formal designation (42355) Typhon I Echidna, /ᵻˈkɪdnə/, from Greek: Έχιδνα—after Echidna, the monstrous mate of Typhon. It orbits Typhon at ~1300 km, completing one orbit in about 11 days. Its diameter is estimated to be 89±6 km. Typhon is the first known binary centaur,[5] using an extended definition of a centaur as an object on a non-resonant (unstable) orbit with the perihelion inside the orbit of Neptune.[6]
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ (42355) Typhon and Echidna
- ↑ 4.0 4.1 Santos-Sanz, P., Lellouch, E., Fornasier, S., Kiss, C., Pal, A., Müller, T. G., Vilenius, E., Stansberry, J., Mommert, M., Delsanti, A., Mueller, M., Peixinho, N., Henry, F., Ortiz, J. L., Thirouin, A., Protopapa, S., Duffard, R., Szalai, N., Lim, T., Ejeta, C., Hartogh, P., Harris, A. W., & Rengel, M. (2012). “TNOs are Cool”: A Survey of the Transneptunian Region IV - Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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