(145480) 2005 TB190

(145480) 2005 TB₁₉₀ (provisional designation 2005 TB₁₉₀) is a trans-Neptunian object (TNO) with an absolute magnitude of 4.4.^[1]

(145480) 2005 TB₁₉₀

Hubble Space Telescope image of 2005 TB190 taken in 2011
Discovery[1]
Discovered by	Becker, A. C., Puckett, A. W., Kubica, J at Apache Point (705)
Discovery date	11 October 2005
Designations
MPC designation	(145480) 2005 TB190
Minor planet category	Ext-SDO (DES)[2]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	5041 days (13.80 yr)
Aphelion	104.14 AU (15.579 Tm) (Q)
Perihelion	46.197 AU (6.9110 Tm) (q)
Semi-major axis	75.166 AU (11.2447 Tm) (a)
Eccentricity	0.38540 (e)
Orbital period (sidereal)	651.69 yr (238031 d)
Mean anomaly	359.520° (M)
Mean motion	0° 0m 5.445s / day (n)
Inclination	26.5376° (i)
Longitude of ascending node	180.4280° (Ω)
Argument of perihelion	171.47° (ω)
Earth MOID	45.1927 AU (6.76073 Tm)
Jupiter MOID	41.2446 AU (6.17010 Tm)
Physical characteristics
Dimensions	464±62 km[3] 372.5±37.5 km[4]
Synodic rotation period	12.68 h (0.528 d)
Sidereal rotation period	12.68 hours
Geometric albedo	0.148+0.051 −0.036 [3] 0.12–0.20 [4]
Spectral type	B−V=0.98 V−R=0.56[5]
Absolute magnitude (H)	4.40±0.11 ,[3] 4.6[1]

Orbit

(145480) 2005 TB190 is located near the "gap", a poorly understood region.

(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.^[2] 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.^[4]

Simulations by Emelʹyanenko 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.^[6]

It has been observed 202 times over seven oppositions.^[1] It will come to perihelion in January 2017.^[1] There are precovery observations dating back to November 2001.

Physical properties

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.^[4]

In the visible light, (145480) 2005 TB₁₉₀ has a moderately red spectral slope.^[5]

The TNO 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.