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187 Lamberta

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° 13 7.68 / day
Inclination	10.588°
Longitude of ascending node	21.707°
Argument of perihelion	196.93°
Earth MOID	1.07102 AU (160.222 Gm)
Jupiter MOID	1.60105 AU (239.514 Gm)
TJupiter	3.289
Physical characteristics
Mean diameter	141±2 km 147.294±1.389 km 131.3±1.1 km
Flattening	0.14
Mass	(1.9±0.3)×10 kg (1.80±0.85)×10 kg
Mean density	1.28±0.22 g/cm 1.51±0.71 g/cm
Synodic rotation period	10.67 h (0.445 d)
Geometric albedo	0.052 (calculated) 0.044±0.007 0.0647 ± 0.0135
Spectral type	C (Tholen)
Absolute magnitude (H)	8.40, 7.980

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.

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.

Notes

1. Flattening derived from the maximum aspect ratio (c/a): ${\displaystyle f=1-{\frac {c}{a}}}$, where (c/a) = 0.86±0.07.

References

1. ^ "187 Lamberta". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
2. ^ P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
3. ^ 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.
4. ^ Pravec, P.; et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan, no. 1667, Bibcode:2012LPICo1667.6089P. See Table 4.

External links

• 187 Lamberta at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 187 Lamberta at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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