(145480) 2005 TB190

(145480) 2005 TB190
Discovery[1]
Discovered by Becker, A. C., Puckett, A. W., Kubica, J at Apache Point (705)
Discovery date 2005-10-11
Designations
MPC designation (145480) 2005 TB190
Minor planet
category		 Ext-SDO (DES)[2]
Epoch : Julian date 2455800.5 (August 27, 2011)
Aphelion 106.58 AU (Q)
Perihelion 46.20 AU (q)
Semi-major axis 76.39 AU (a)
Eccentricity 0.395
Orbital period 667.66 yr
Mean anomaly 357.1° (M)
Inclination 26.43°
Longitude of ascending node 180.5°
Argument of perihelion 171.6°
Physical characteristics
Dimensions 372.5 ± 37.5 km[3]
Albedo 0.12–0.20[3]
Spectral type B-V=0.98
V-R=0.56[4]
Absolute magnitude (H) 4.6[3]

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

Contents

Orbit

(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] Though 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.[3]

Simulations by Emel’yanenko and Kiseleva in 2007 show that (145480) 2005 TB190 appears to have less than a 1% chance of being in a 4:1 resonance with Neptune.[5]

It has been observed 156 times over 7 oppositions.[1] It will come to perihelion in January 2017.[1]

Physical properties

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.[3]

In the visible light 2005 TB190 has a moderately red spectral slope.[4]

References

  1. ^ a b c d e "JPL Small-Body Database Browser: 145480 (2005 TB190)". 2008-08-29 last observation used. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=145480. Retrieved 2011-05-22. 
  2. ^ a b Marc W. Buie (2008-08-29). "Orbit Fit and Astrometric record for 145480". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/145480.html. Retrieved 2009-01-24. 
  3. ^ 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. Bibcode 2010A&A...518L.146M. doi:10.1051/0004-6361/201014683. 
  4. ^ 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. 
  5. ^ 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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