138 Tolosa

138 Tolosa
3D convex shape model of 138 Tolosa
Discovery
Discovered byHenri Joseph Perrotin
Discovery date19 May 1874
Designations
(138) Tolosa
Pronunciation/toʊˈloʊsə/[1][2]
Named after
Toulouse (Tolōsa)
A874 KA; 1909 SB
Main belt
Orbital characteristics[3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc110.38 yr (40315 d)
Aphelion2.8463 AU (425.80 Gm)
Perihelion2.05145 AU (306.893 Gm)
2.44887 AU (366.346 Gm)
Eccentricity0.16229
3.83 yr (1399.7 d)
18.91 km/s
348.297°
0° 15m 25.884s / day
Inclination3.2038°
54.762°
260.825°
Physical characteristics
Dimensions51.86 ± 3.07 km[4]
45.50±2.1 km[3][5]
Mass(4.93 ± 2.59) × 1017 kg[4]
Mean density
6.74 ± 3.74 g/cm3[4]
Equatorial surface gravity
0.0127 m/s²
Equatorial escape velocity
0.0241 km/s
10.101 h (0.4209 d)[3]
10.103 h[5]
0.2699±0.027[3][5]
Temperature~178 K
S
8.75

138 Tolosa 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 ([tɔˈloːsa] and [tuˈluzɔ]) 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.[5]

  1. ^ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
  2. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  3. ^ a b c d Cite error: The named reference JPL was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Carry2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Hardersen2006 was invoked but never defined (see the help page).