19521 Chaos
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Discovery
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| Discovered by | Deep Ecliptic Survey |
| Discovery date | November 19, 1998 |
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Designations
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| MPC designation | 19521 Chaos |
| Pronunciation |
 /ˈkeɪ.ɒs/, from Greek: Χάος
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| Named after | Chaos |
| Alternate name(s) | 1998 WH24 |
| Minor planet category |
TNO (cubewano)[1] |
| Adjective | Chaotian |
| 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° |
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Physical characteristics
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| Dimensions | 600+140 −130 km[3] |
| Sidereal rotation period |
3.985 (days) |
| Albedo | 0.050+0.030 −0.016[3] |
| Absolute magnitude (H) | 4.9[2] |
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). http://www.boulder.swri.edu/~buie/kbo/astrom/19521.html. Retrieved 2008-09-28.
- ^ a b c "JPL Small-Body Database Browser: 19521 Chaos (1998 WH24)". 2007-12-14 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Chaos. Retrieved 2010-03-13.
- ^ a b c d “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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