19521 Chaos
A trans-Neptunian object about 600 km across, 46.1 AU out and 312.9 years to a lap of the Sun.
Where it is right now
19521 Chaos is in Auriga, 41.9 AU away, magnitude 21.0.
Computed for 2 August 2026, 17:00 UTC, and recomputed at least hourly. This page is cached, so treat the line above as accurate to the hour rather than to the second. The map shows the live position.
Position from a Kepler propagation of the published elements below, accurate to about an arcminute.
Facts
Every line carries the source it came from.
- Diameter
- 600 kmSource: Published occultation and Herschel/Spitzer radiometry results
- Orbital period
- 312.9 yearsSource: NASA/JPL Small-Body Database
- Distance from the Sun
- 46.090 AU on averageSource: NASA/JPL Small-Body Database
- Orbit shape
- eccentricity 0.110, inclined 12.0 degrees to the eclipticSource: NASA/JPL Small-Body Database
- Class
- Trans-neptunian objectSource: NASA/JPL Small-Body Database
- Discovered
- 1998-Nov-19 by Buie, M. W.Source: NASA/JPL Small-Body Database
Physical size
- Mean radius
- 300 km
- Diameter
- 600 km across
- Absolute magnitude H
- 4.64
Orbit
Elements are heliocentric, referred to the J2000.0 ecliptic.
- Average distance from the Sun
- 46.090 AU (6,895.0 million km)
- Closest and furthest
- 41.007 AU (6,134.6 million km) to 51.173 AU (7,655.4 million km)
- Eccentricity
- 0.1103, slightly elliptical
- Inclination to the ecliptic
- 12.03 degrees
- Orbital period
- 313 years
- Longitude of ascending node
- 49.94 degrees
- Argument of periapsis
- 57.02 degrees
- Mean anomaly at J2000.0
- 320.24 degrees
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Catalog id chaos. 3,172 objects on the map, of which 171 are hand-authored with sourced facts.