(145480) 2005 TB190
Trans-Neptunian object
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(145480) 2005 TB190 (provisional designation 2005 TB190) is a trans-Neptunian object (TNO) with an absolute magnitude of 4.4.[1]
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 | |
| (145480) 2005 TB190 | |
| 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) |
| 75.166 AU (11.2447 Tm) (a) | |
| Eccentricity | 0.38540 (e) |
| 651.69 yr (238031 d) | |
| 359.520° (M) | |
| 0° 0m 5.445s / day (n) | |
| Inclination | 26.5376° (i) |
| 180.4280° (Ω) | |
| 171.47° (Ï) | |
| Known satellites | 0 |
| Earth MOID | 45.1927 AU (6.76073 Tm) |
| Jupiter MOID | 41.2446 AU (6.17010 Tm) |
| Physical characteristics | |
| Dimensions | 507+127 â116 km[3] |
| 12.68 h (0.528 d) | |
| 12.68 hours | |
| 0.148+0.051 â0.036 [4] 0.12â0.20 [5] | |
| BâV=0.98 VâR=0.56[6] | |
| 4.40±0.11 ,[4] 4.6[1] | |
Orbit
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 2005 TB190 lies at 104 AU.[5]
Simulations by Emelʹyanenko and Kiseleva in 2007 showed that 2005 TB190 appears to have less than a 1% chance of being in a 4:1 resonance with Neptune.[7]
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 2005 TB190 in the far-infrared was measured by the Herschel Space Telescope. Initially, its size was estimated to lie within a range from 335 to 410 km.[5] Upon further analysis, its size was estimated to be around 507 km (315 mi).[3]
In the visible light, 2005 TB190 has a moderately red spectral slope.[6]
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.
