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.
_Tolosa.png) 3D convex shape model of 138 Tolosa | |
| Discovery | |
|---|---|
| Discovered by | Henri Joseph Perrotin |
| Discovery date | 19 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 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) | |
Average orbital speed | 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[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 | |
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]
References
edit- ^ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
- ^ Noah Webster (1884) A Practical Dictionary of the English Language
- ^ a b c d Yeomans, Donald K., "138 Tolosa", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ^ a b c d 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, vol. 181, no. 1, pp. 94–106, Bibcode:2006Icar..181...94H, doi:10.1016/j.icarus.2005.10.003, archived from the original (PDF) on 10 August 2017, retrieved 30 March 2013.
External links
edit- 138 Tolosa at AstDyS-2, Asteroids—Dynamic Site
- 138 Tolosa at the JPL Small-Body Database
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