19521 Chaos

19521 Chaos
Discovery
Discovered by Deep Ecliptic Srvy.
Discovery date 19 November 1998
Designations
MPC designation (19521) Chaos
Pronunciation /ˈkeɪ.ɒs/
Named after
 Chaos
1998 WH24
TNO (cubewano)[1][2]
Adjectives Chaotian
Orbital characteristics[3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc 5902 days (16.16 yr)
Earliest precovery date 17 October 1991
Aphelion 50.636 AU (7.5750 Tm)
Perihelion 40.957 AU (6.1271 Tm)
45.796 AU (6.8510 Tm)
Eccentricity 0.10567
309.92 yr (113199 d)
4.3931 km/s
337.2998°
0° 0m 11.449s / day
Inclination 12.0502°
50.0239°
58.4097°
Jupiter MOID 35.8 AU (5.36 Tm)
Neptune MOID 12.5 AU (1.87 Tm)[4]
TJupiter 5.884
Physical characteristics
Dimensions 600+140
−130 km [5]
3.985 d
0.050+0.030
−0.016 [5]
4.8[3]
5.0 [6]

    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    ,[5] making it, with its absolute magnitude (H) of 4.8,[3] 600+140
    −130     km     in diameter.[5] 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 longer, but less 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. Currently, the closest approach possible to Neptune (MOID) is 12.5 AU (1.87 billion km).[4]

    Left: The orbit of 19521 Chaos (blue) compared to those of the four giant planets: Jupiter, Saturn, Uranus and Neptune (red). Right: 19521 Chaos's size compared to several other trans-Neptunian objects (TNOs) and to the Earth's Moon.

    In fiction

    In the online comic Quantum Vibe the lead characters hide on a secret base they have constructed on Chaos to perform experiments undetected.[7]

    References

    1. ↑ "MPEC 2008-O05 : Distant Minor Planets (2008 AUG. 2.0 TT)". Minor Planet Center. 17 July 2008. Retrieved 2011-01-08.
    2. ↑ Marc W. Buie (2004-11-09). "Orbit Fit and Astrometric record for 19521". SwRI (Space Science Department). Retrieved 2008-09-28.
    3. 1 2 3 "JPL Small-Body Database Browser: 19521 Chaos (1998 WH24)" (2007-12-14 last obs). Retrieved 11 April 2016.
    4. 1 2 "(19521) Chaos = 1998 WH24 Orbit". IAU Minor Planet Center. Retrieved 2018-02-10.
    5. 1 2 3 4 “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
    6. ↑ "How many dwarf planets are there in the outer solar system?". Michael E. Brown. Retrieved 15 September 2016.
    7. ↑ http://www.quantumvibe.com/strip?page=1013


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