19521 Chaos
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| Discovery | |
|---|---|
| Discovered by |
Deep Ecliptic Survey |
| Discovery date | November 19, 1998 |
| Designations | |
| MPC designation | 19521 Chaos |
| Pronunciation | /ˈkeɪ.ɒs/ |
| Named after | Chaos |
| Alternative names | 1998 WH24 |
| Minor planet category | TNO (cubewano)[1] |
| Adjective | Chaotian |
| Orbital characteristics[2] | |
| Epoch January 30, 2005 (JD 2453400.5) | |
| Aphelion | 50.269 AU |
| Perihelion | 40.929 AU |
| Semi-major axis | 45.599 AU |
| Eccentricity | 0.102 |
| Orbital period | 309.1006 y |
| Average orbital speed | 4.3931 km/s |
| Mean anomaly | 324.2844° |
| Inclination | 12.0550° |
| Longitude of ascending node | 50.0103° |
| Argument of perihelion | 58.6836° |
| Physical characteristics | |
| Dimensions |
600+140 −130 km[3] |
| Sidereal rotation period | 3.985 d |
| Albedo |
0.050+0.030 −0.016[3] |
| Absolute magnitude (H) | 4.9[2] |
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19521 Chaos /ˈkeɪ.ɒs/, is a cubewano, a Kuiper-belt object not in resonance with any planet. It is a likely dwarf planet. Chaos was discovered in 1998 by the Deep Ecliptic Survey, with Kitt Peak's 4 m telescope. Its albedo is 0.050+0.030
−0.016,[3] making it, with its absolute magnitude (H) of 4.9,[2] 600+140
−130 km in diameter.[3] It is named after the primeval state of existence in Greek mythology, from which the first gods appeared.
References
- ↑ Marc W. Buie (2004-11-09). "Orbit Fit and Astrometric record for 19521". SwRI (Space Science Department). Retrieved 2008-09-28.
- ↑ 2.0 2.1 2.2 "JPL Small-Body Database Browser: 19521 Chaos (1998 WH24)". 2007-12-14 last obs. Retrieved 2010-03-13.
- ↑ 3.0 3.1 3.2 3.3 “TNOs are Cool”: A survey of the trans-Neptunian region VI. Herschel/PACS observations and thermal modeling of 19 classical Kuiper belt objects E. Vilenius, C. Kiss, M. Mommert, T. Müller, P. Santos-Sanz, A. Pal, J. Stansberry, M. Mueller, N. Peixinho, S. Fornasier, E. Lellouch, A. Delsanti, A. Thirouin, J. L. Ortiz, R. Duffard, D. Perna, N. Szalai, S. Protopapa, F. Henry, D. Hestroffer, M. Rengel, E. Dotto, & P. Hartogh
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
Size comparison between Earth's Moon and several large TNOs, including Chaos
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