(19308) 1996 TO66

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(19308) 1996 TO66
File:19308-1996to66 hst.jpg
Hubble Space Telescope image of 1996 TO66 taken in 2005
Discovery
Discovered by
Discovery date12 October 1996
Designations
(19308) 1996 TO66
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc7322 days (20.05 yr)
Aphelion48.375 AU (7.2368 Tm)
Perihelion37.939 AU (5.6756 Tm)
43.157 AU (6.4562 Tm)
Eccentricity0.12090
283.52 yr (103,555 d)
137.16°
0° 0m 12.515s / day
Inclination27.4948°
355.2889°
239.07°
Earth MOID37.0117 AU (5.53687 Tm)
Jupiter MOID33.0091 AU (4.93809 Tm)
Physical characteristics
Dimensions
7.92 h (0.330 d)
7.92 h[2]
0.7 (assumed)
Temperature~43 K
  • Neutral
  • B−V = 0.68, V−R = 0.39[5]
  • B−V = 0.74, V−R = 0.38[6]
4.5

(19308) 1996 TO66 (provisional designation 1996 TO66) is a trans-Neptunian object that was discovered in 1996 by Chadwick Trujillo, David Jewitt and Jane Luu. Until 20000 Varuna was discovered, it was the second-brightest known object in the Kuiper belt, after Pluto.

Origin

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Main article: Haumea family
File:(19308) 1996 TO66 imaged by NTT cut out.jpg
1996 TO66 (center top) imaged by the NTT at La Silla in 1998. Other objects are elongated due to the 4-hour-exposure. The horizontal streak is from a geostationary satellite.

Based on their common pattern of IR water-ice absorptions, neutral visible spectrum[7] and the clustering of their orbital elements, the other KBOs (24835) 1995 SM55, (55636) 2002 TX300, (120178) 2003 OP32 and (145453) 2005 RR43 all appear to be collisional fragments broken off of the dwarf planet Haumea.

Orbit

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The eccentricity of 1996 TO66 varies between ca. 0.110 and 0.125 every 2 million years, with additional variations on the order of ± 0.01 on much shorter time scales. It is in an intermittent 19:11 resonance with Neptune. The resonance breaks every 2 million years when the eccentricity is highest and the orbit is closest to Neptune.[1]

References

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