| Minorplanet: | yes |
| 1851 Lacroute | |
| Background: |
|
| Discovered: | 9 November 1950 |
| Mpc Name: | (1851) Lacroute |
| Alt Names: | 1950 VA |
| Named After: | Pierre Lacroute |
| Epoch: | 4 September 2017 (JD 2458000.5) |
| Uncertainty: | 0 |
| Observation Arc: | 66.35 yr (24,236 days) |
| Perihelion: | 2.5044 AU |
| Semimajor: | 3.1024 AU |
| Eccentricity: | 0.1927 |
| Period: | 5.46 yr (1,996 days) |
| Mean Motion: | / day |
| Inclination: | 1.6660° |
| Asc Node: | 24.766° |
| Arg Peri: | 343.20° |
| Dimensions: | 16.89 km km |
| Albedo: | |
| Abs Magnitude: | 12.7 |
1851 Lacroute, provisional designation, is an asteroid from the outer region of the asteroid belt, approximately 17 kilometers in diameter.
It was discovered on 9 November 1950, by French astronomer Louis Boyer at the Algiers Observatory in the capital of Algeria, Northern Africa, and named after French astronomer Pierre Lacroute.
Lacroute orbits the Sun in the outer main-belt at a distance of 2.5–3.7 AU once every 5 years and 6 months (1,996 days). Its orbit has an eccentricity of 0.19 and an inclination of 2° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its official discovery observation in 1950.
According to the surveys carried out by the Infrared Astronomical Satellite (IRAS) and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Lacroute measures 16.9 and 18.2 kilometers in diameter, and its surface has an albedo of 0.049 and 0.074, respectively. As of 2016, the body's spectral type, as well as its rotation period and shape remain unknown.
This minor planet was named in honor of French astronomer Pierre Lacroute (1906–1993), a known astrometrist, president of IAU's Commission 24 in the 1970s, and director of the Observatory of Strasbourg, instrumental in the establishment of the Stellar Data Center (also see SIMBAD).
Lacroute also made an independent reduction of the astrometric star catalogue AGK3, using a technique involving overlapping photographic plates. The official was published by the Minor Planet Center on 1 August 1978 .