What does this number measure?
Effective diameter estimated in the NASA/JPL SBDB database. This describes an overall size and does not assume a spherical shape. A resolved image of its surface is not necessarily available.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Catalogue value: a source is provided, but the measurement has not been individually audited in this project.
511 Davida: interpretation of an irregular silhouette; conjectural craters, surface details and colours, with an indicative effective diameter.