1597 Laugier
Main-belt asteroid
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1597 Laugier, provisional designation 1949 EB, is an asteroid from the outer region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 7 March 1949, by French astronomer Louis Boyer at the north African Algiers Observatory in Algeria.[6] It was later named after French astronomer Marguerite Laugier.[2]
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Shape model of Laugier from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | L. Boyer |
| Discovery site | Algiers Obs. |
| Discovery date | 7 March 1949 |
| Designations | |
| (1597) Laugier | |
Named after | Marguerite Laugier (French astronomer)[2] |
| 1949 EB | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 68.01 yr (24,840 days) |
| Aphelion | 3.1024 AU |
| Perihelion | 2.5869 AU |
| 2.8446 AU | |
| Eccentricity | 0.0906 |
| 4.80 yr (1,752 days) | |
| 67.764° | |
| 0° 12m 19.44s / day | |
| Inclination | 11.812° |
| 158.63° | |
| 52.042° | |
| Physical characteristics | |
| Dimensions | 12.885±0.169[4] 24.30 km (calculated)[3] |
| 8.0199 h[3] 8.02272 h[5] | |
| 0.057 (assumed)[3] 0.244±0.033[4] | |
| C[3] | |
| 11.7[1] · 11.8[3] | |
Orbit and classification
This asteroid orbits the Sun in the outer main-belt at a distance of 2.6â3.1 AU once every 4 years and 10 months (1,752 days). Its orbit has an eccentricity of 0.09 and an inclination of 12° with respect to the ecliptic.[1] As no precoveries were taken and no prior identifications were made, Laugier's observation arc begins with its official discovery observation in 1949.[6]
Physical characteristics
Laugier is a presumed C-type asteroid[3]
Lightcurves
A rotational lightcurve for this asteroid from an unpublished source at the Asteroid Light Curve Database gave a well-defined rotation period of 8.020 hours with a brightness amplitude between 0.68 and 0.71 in magnitude (U=3).[3] A similar period of 8.023 hours was previously obtained from remodeled data of the Lowell photometric database in March 2016.[1][5]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Laugier measures 12.9 kilometers in diameter and its surface has an albedo of 0.244,[4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057, and calculates a diameter of 24.3 kilometers based on an absolute magnitude of 11.8.[3]
Naming
This minor planet was named after French astronomer and asteroid discoverer Marguerite Laugier (1896â1976). The official naming citation was published by the Minor Planet Center on 1 August 1978 (M.P.C. 4418).[7]
