138 Tolosa

138 Tolosa
Discovery
Discovered by Henri Joseph Perrotin
Discovery date 19 May 1874
Designations
MPC designation (138) Tolosa
Named after
 Toulouse
 
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 110.38 yr (40315 d)
Aphelion 2.8463 AU (425.80 Gm)
Perihelion 2.05145 AU (306.893 Gm)
2.44887 AU (366.346 Gm)
Eccentricity 0.16229
3.83 yr (1399.7 d)
18.91 km/s
348.297°
0° 15m 25.884s / day
Inclination 3.2038°
54.762°
260.825°
Physical characteristics
Dimensions 51.86 ± 3.07 km[2]
45.50±2.1 km[1][3]
Mass (4.93 ± 2.59) × 1017 kg[2]
Mean density
 6.74 ± 3.74 g/cm3[2]
Equatorial surface gravity
 0.0127 m/s²
Equatorial escape velocity
 0.0241 km/s
10.101 h (0.4209 d)[1]
10.103 h[3]
0.2699±0.027[1][3]
Temperature ~178 K
S
8.75

    138 Tolosa (/toʊˈloʊsə, -zə/, Occitan: [tuˈluzɔ]; Latin: Tolōsa [tɔˈloːsa]) is a brightly coloured, stony background asteroid from the inner region of the asteroid belt. It was discovered by French astronomer Henri Joseph Perrotin on 19 May 1874, and named by the Latin and Occitan name of the French city of Toulouse.

    The spectrum of this asteroid rules out the presence of ordinary chondrites, while leaning in favor of clinopyroxene phases. As of 2006, there are no known meteorites with compositions similar to the spectrum of 138 Tolosa.[3]

    References

    1. 1 2 3 4 Yeomans, Donald K., "138 Tolosa", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
    2. 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    3. 1 2 3 4 Hardersen, Paul S.; et al. (March 2006), "Near-infrared spectral observations and interpretations for S-asteroids 138 Tolosa, 306 Unitas, 346 Hermentaria, and 480 Hansa" (PDF), Icarus, 181 (1), pp. 94–106, Bibcode:2006Icar..181...94H, doi:10.1016/j.icarus.2005.10.003, retrieved 2013-03-30.


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