(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 2005-10-11
MPC designation (145480) 2005 TB190
Minor planet category Ext-SDO (DES)[2]
Orbital characteristics[1]
Epoch : Julian date 2455800.5 (August 27, 2011)
Aphelion 106.58 AU (Q)
Perihelion 46.20 AU (q)
76.39 AU (a)
Eccentricity 0.395
667.66 yr
357.1° (M)
Inclination 26.43°
Physical characteristics
Dimensions 464±62 km[3]
372.5 ± 37.5 km[4]
Albedo 0.148+0.051
Spectral type

(145480) 2005 TB190, provisionally known as 2005 TB190, is a trans-Neptunian object (TNO) with an absolute magnitude of 4.7,[1] making it a likely dwarf planet.


(145480) 2005 TB190 is classified as scattered-extended by the Deep Ecliptic Survey (DES), since 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 beyond 106 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.[6]

It has been observed 156 times over seven oppositions.[1] It will come to perihelion in January 2017.[1]

Physical properties[edit]

In 2010, thermal flux from 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, 2005 TB190 has a moderately red spectral slope.[5]


  1. ^ a b c d e "JPL Small-Body Database Browser: 145480 (2005 TB190)" (2008-08-29 last observation used). Retrieved 2011-05-22. 
  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 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
  4. ^ a b c d e 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:1005.2923. 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:1001.3674. Bibcode:2010AJ....139.1394S. doi:10.1088/0004-6256/139/4/1394. 
  6. ^ 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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