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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 | /ˈkeɪɒs/, from Greek: Χάος |
| Alternate name | 1998 WH24 |
| Minor planet category |
TNO (cubewano)[1] |
| 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 | ~560 km |
| Sidereal rotation period |
3.985 (days) |
| Absolute magnitude (H) | 4.9 |
19521 Chaos is a cubewano, a Kuiper belt object not in resonance with any planet. Chaos was discovered in 1998 by the Deep Ecliptic Survey, with Kitt Peak's 4 m telescope. It is large at about 560 km, and bright at H=4.755. 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.
- original MPEC circular 1998-X08and the revision, 1999-V03
- AstDys
- NASA JPL Small-Body Database Browser on 19521 Chaos
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