[6] According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's WISE space-telescope, Leona measures between 49.943 and 89.00 kilometers in diameter and its surface has an albedo between 0.02 and 0.085.

All of these low-numbered asteroids have numbers between 164 Eva and 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth.

[18] Projections were later refined as more data were analyzed for[19] a totality of approximately five seconds on a 60 km wide path stretching from China, Tajikistan, Armenia, Turkey, Greece, Italy, Spain, the Atlantic Ocean, Miami, Florida and the Florida Keys to parts of Mexico.

[20] Among other programmes, 80 amateur astronomers in Europe were coordinated by astrophysicist Miguel Montargès, et al. of the Paris Observatory for the event.

[21] Light curve studies of the event was expected to help understand the distribution of brightness down to the granular level of Beltegeuse's convection cells,[22] thus providing detailed data on the giant star heretofor inaccessible.

Observations of the earlier September 2023 occultation showed that the asteroid was slightly elliptical; a preliminary 3D model of Leona was able to be constructived.