(145480) 2005 TB190

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(145480) 2005 TB190
Discovered by Becker, A. C., Puckett, A. W., Kubica, J at Apache Point (705)
Discovery date 11 October 2005
MPC designation (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° (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]
12.68 h (0.528 d)
12.68 hours
0.12–0.20 [4]
4.40±0.11 ,[3] 4.6[1]

(145480) 2005 TB190, provisionally known as 2005 TB190, is a trans-Neptunian object (TNO) with an absolute magnitude of 4.4,[1] making it a likely dwarf planet.[6]


(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 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.[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[edit]

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.


  1. ^ a b c d e f "JPL Small-Body Database Browser: 145480 (2005 TB190)" (2008-08-29 last observation used). Retrieved 7 April 2016. 
  2. ^ a b Marc W. Buie (2008-08-29). "Orbit Fit and Astrometric record for 145480". SwRI (Space Science Department). Retrieved 2009-01-24. 
  3. ^ a b c Santos-Sanz, P., Lellouch, E., Fornasier, S., Kiss, C., Pal, A., Müller, T. G., Vilenius, E., Stansberry, J., Mommert, M., Delsanti, A., Mueller, M., Peixinho, N., Henry, F., Ortiz, J. L., Thirouin, A., Protopapa, S., Duffard, R., Szalai, N., Lim, T., Ejeta, C., Hartogh, P., Harris, A. W., & Rengel, M. (2012). “TNOs are Cool”: A Survey of the Transneptunian Region IV - Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS arXiv:1202.1481
  4. ^ a b c d Muller, T.G.; Lellouch, E.; Stansberry, J.; et al. (2010). ""TNOs are Cool": A survey of the trans-Neptunian region I. Results from the Herschel science demonstration phase (SDP)". Astronomy and Astrophysics. 518: L146. arXiv:1005.2923Freely accessible. Bibcode:2010A&A...518L.146M. doi:10.1051/0004-6361/201014683. 
  5. ^ a b Sheppard, Scott S. (2010). "The colors of extreme outer Solar System objects". The Astronomical Journal. 139 (4): 1394–1405. arXiv:1001.3674Freely accessible. Bibcode:2010AJ....139.1394S. doi:10.1088/0004-6256/139/4/1394. 
  6. ^ "How many dwarf planets are there in the outer solar system?". Gps.caltech.edu. 2015-07-21. Archived from the original on 2011-10-18. Retrieved 2015-07-22. 
  7. ^ Emel’yanenko, V. V; Kiseleva, E. L. (2008). "Resonant motion of trans-Neptunian objects in high-eccentricity orbits". Astronomy Letters. 34: 271–279. Bibcode:2008AstL...34..271E. doi:10.1134/S1063773708040075. 

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