Hubble Space Telescope image of 1996 TO66 taken in 2005
|Discovery date||12 October 1996|
|(19308) 1996 TO66|
|Orbital characteristics |
|Epoch 13 January 2016 (JD 2457400.5)|
|Uncertainty parameter 3|
|Observation arc||7322 days (20.05 yr)|
|Aphelion||48.375 AU (7.2368 Tm)|
|Perihelion||37.939 AU (5.6756 Tm)|
|43.157 AU (6.4562 Tm)|
|283.52 yr (103,555 d)|
|0° 0m 12.515s / day|
|Earth MOID||37.0117 AU (5.53687 Tm)|
|Jupiter MOID||33.0091 AU (4.93809 Tm)|
|7.92 h (0.330 d)|
Sidereal rotation period
|7.92 h |
|Temperature||~ 43 K|
(19308) 1996 TO66 (also written (19308) 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-largest known object in the Kuiper belt, after Pluto.
Based on their common pattern of IR water-ice absorptions, neutral visible spectrum 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.
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.
Categories: Minor planet object articles (numbered) | Haumea family | Kuiper belt objects | Discoveries by David C. Jewitt | Discoveries by Jane Luu | Discoveries by Chad Trujillo | Astronomical objects discovered in 1996 | Centaur and trans-Neptunian object stubs