2754 Efimov
2754 Efimov, provisionally named , is a stony asteroid and binary system from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 13 August 1966, by Russian astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. The asteroid was named after Russian aviator Mikhail Efimov. Orbit and classification. "Efimov" orbits the Sun in the inner main-belt at a distance of 1.7–2.7 AU once every 3 years and 4 months (1,214 days). Its orbit has an eccentricity of 0.23 and an inclination of 6° with respect  to the ecliptic. Physical characteristics. In the SMASS classification, "Efimov" is a Sa-type asteroid, which belong to the larger group of S-type asteroids. It is also characterized as a L-type asteroid by PanSTARRS photometric survey. The "Collaborative Asteroid Lightcurve Link" assumes a standard albedo for stony asteroids of 0.20 and derives a diameter of 4.98 kilometers with an absolute magnitude of 13.92. Satellite. "Efimov" is a binary asteroid. In 2006, astronomers discovered a minor-planet moon, designated around "Efimov" using lightcurve observations, with a diameter of 1.29 kilometers and an orbital period of 14 hours and 46  minutes. Naming. This minor planet named in memory of Russian aviator Mikhail Nikiforovich Efimov (; 1881–1919), who was the first to realize steep turns and dives. The approved naming citation was published by the Minor Planet Center on 31 May 1988 ().