19521 Chaos

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19521 Chaos
Discovered by Deep Ecliptic
Discovery date November 19, 1998
MPC designation 19521 Chaos
Pronunciation /ˈk.ɒs/
Named after
1998 WH24
Minor planet category TNO (cubewano)[1]
Adjectives Chaotian
Orbital characteristics[2]
Epoch January 30, 2005 (JD 2453400.5)
Aphelion 50.269 AU
Perihelion 40.929 AU
45.599 AU
Eccentricity 0.102
309.1006 y
4.3931 km/s
Inclination 12.0550°
Physical characteristics
Dimensions 600+140
3.985 d
Albedo 0.050+0.030

19521 Chaos /ˈk.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
,[3] making it, with its absolute magnitude (H) of 4.9,[2] 600+140
in diameter.[3] It is named after the primeval state of existence in Greek mythology, from which the first gods appeared.

Size comparison between Earth's Moon and several large TNOs, including Chaos.


  1. ^ Marc W. Buie (2004-11-09). "Orbit Fit and Astrometric record for 19521". SwRI (Space Science Department). Retrieved 2008-09-28. 
  2. ^ a b c "JPL Small-Body Database Browser: 19521 Chaos (1998 WH24)" (2007-12-14 last obs). Retrieved 2010-03-13. 
  3. ^ 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

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