|Discovered by||Deep Ecliptic
|Discovery date||19 November 1998|
|MPC designation||19521 Chaos|
|Epoch 13 January 2016 (JD 2457400.5)|
|Uncertainty parameter 3|
|Observation arc||5902 days (16.16 yr)|
|Aphelion||50.636 AU (7.5750 Tm)|
|Perihelion||40.957 AU (6.1271 Tm)|
|45.796 AU (6.8510 Tm)|
|309.92 yr (113199 d)|
Average orbital speed
|0° 0m 11.449s / day|
|Earth MOID||39.9896 AU (5.98236 Tm)|
|Jupiter MOID||35.8316 AU (5.36033 Tm)|
|Jupiter Tisserand parameter||5.884|
−130 km 600
Sidereal rotation period
19521 Chaos // 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 +0.030
−0.016, 0.050 making it, with its absolute magnitude (H) of 4.8, +140
−130 km in diameter. 600 It is named after the primeval state of existence in Greek mythology, from which the first gods appeared.
Orbit and rotation
19521 Chaos has an orbital period of approximately 309 years. Its orbit is not much more eccentric than the orbit of Pluto. 19521 Chaos's orbit is inclined approximately 12° to the ecliptic. Its orbit never crosses the orbit of Neptune.
- Marc W. Buie (2004-11-09). "Orbit Fit and Astrometric record for 19521". SwRI (Space Science Department). Retrieved 2008-09-28.
- "JPL Small-Body Database Browser: 19521 Chaos (1998 WH24)" (2007-12-14 last obs). Retrieved 11 April 2016.
- “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
- "How many dwarf planets are there in the outer solar system?". Michael E. Brown. Retrieved 15 September 2016.
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- Original Minor Planet Electronic Circular (1998-X08) for 19521 Chaos
- Revised Minor Planet Electronic Circular (1999-V03) 19521 Chaos
- 19521 Chaos at the JPL Small-Body Database
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