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(145480) 2005 Tb190

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(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]
Orbital characteristics[1]
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 464±62 km[3]
372.5 ± 37.5 km[4]
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) 4.6[4]

(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.

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.[4]

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.[6]

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.[4]

In the visible light 2005 TB190 has a moderately red spectral slope.[5]

References

External links

  • Horizons Ephemeris
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