11 October 2005
5041 days (13.80 yr)
Sidereal rotation period
Apache Point Observatory
(145480) 2005 TB190
11 October 2005
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104.14 AU (15.579 Tm) (Q)
46.197 AU (6.9110 Tm) (q)
Minor planet category
Detached object (Deep Ecliptic Survey)
(145480) 2005 TB190, provisionally known as 2005 TB190, is a trans-Neptunian object (TNO) with an absolute magnitude of 4.4, making it a likely dwarf planet.
(145480) 2005 TB190 is classified as scattered-extended by the Deep Ecliptic Survey (DES), because its orbit appears to be beyond significant gravitational interactions with Neptune's current orbit. However, if Neptune migrated outward, there would have been a period when Neptune had a higher eccentricity. The aphelion of (145480) 2005 TB190 lies at 104 AU.
Simulations by Emel’yanenko and Kiseleva in 2007 showed that (145480) 2005 TB190 appears to have less than a 1% chance of being in a 4:1 resonance with Neptune.
It has been observed 202 times over seven oppositions. It will come to perihelion in January 2017. There are precovery observations dating back to November 2001.
In 2010, thermal flux from (145480) 2005 TB190 in the far-infrared was measured by the Herschel Space Telescope. As a result, its size was estimated to lie within a range from 335 to 410 km.
In the visible light, (145480) 2005 TB190 has a moderately red spectral slope.
The asteroid was found in 2009 to have a rotation period of 12.68 ±3 hours, a common value for trans-neptunian objects of its size. Similarly-sized (120348) 2004 TY364 has a rotation period of 11.7 ± 3 hours.