187 Lamberta
Lamberta (minor planet designation: 187 Lamberta) is a main-belt asteroid that was discovered by Corsican-born French astronomer Jérôme Eugène Coggia on April 11, 1878, and named after the astronomer Johann Heinrich Lambert. It was the second of Coggia's five asteroid discoveries.
| Discovery | |
|---|---|
| Discovered by | J. Coggia, 1878 |
| Discovery date | 11 April 1878 |
| Designations | |
MPC designation | (187) Lamberta |
| Pronunciation | /læmˈbɜːrtə/ |
Alternative designations | A878 GB; 1946 LB; 1948 XR |
Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.41 yr (41424 d) |
| Aphelion | 3.3856 AU (506.48 Gm) |
| Perihelion | 2.0695 AU (309.59 Gm) |
Semi-major axis | 2.7276 AU (408.04 Gm) |
| Eccentricity | 0.24126 |
Orbital period (sidereal) | 4.50 yr (1645.3 d) |
Mean anomaly | 217.42° |
Mean motion | 0° 13m 7.68s / day |
| Inclination | 10.588° |
Longitude of ascending node | 21.707° |
| 196.93° | |
| Earth MOID | 1.0648 AU (159.29 Gm) |
| Jupiter MOID | 1.60306 AU (239.814 Gm) |
| TJupiter | 3.289 |
| Physical characteristics | |
| Dimensions | c/a = 0.86±0.07 |
Mean diameter | 141±2 km 130.4±2.7 km 131.3±1.1 km |
| Mass | (1.9±0.3)×1018 kg (1.80±0.85)×1018 kg |
Mean density | 1.28±0.22 g/cm3 1.51±0.71 g/cm3 |
Synodic rotation period | 10.670 h (0.4446 d) |
| 0.052 (calculated) 0.0566±0.002 0.0647 ± 0.0135 | |
| C (Tholen) | |
| 8.16, 7.980 | |
The spectrum matches a classification of a C-type asteroid, which may mean it has a composition of primitive carbonaceous materials. It is a dark object as indicated by the low albedo and has an estimated size of about 131 km.
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