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2754 Efimov, provisionally named 1966 PD, 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.[6] The asteroid was named after Russian aviator Mikhail Efimov.[2]
Discovery [1] | |
---|---|
Discovered by | T. Smirnova |
Discovery site | Crimean Astrophysical Obs. |
Discovery date | 13 August 1966 |
Designations | |
(2754) Efimov | |
Named after | Mikhail Efimov (Russian aviator)[2] |
1966 PD · 1933 WF 1966 RB · 1973 YR1 | |
main-belt · (inner)[3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 66.15 yr (24,160 days) |
Aphelion | 2.7464 AU |
Perihelion | 1.7085 AU |
2.2274 AU | |
Eccentricity | 0.2330 |
3.32 yr (1,214 days) | |
100.35° | |
0° 17m 47.4s / day | |
Inclination | 5.7096° |
275.17° | |
91.098° | |
Known satellites | 1[4] |
Physical characteristics | |
Dimensions | 4.98 km (derived)[3] |
2.44967 h (0.102070 d)[3] | |
0.20 (assumed)[3] | |
SMASS = Sa [1] · S [3] · L [5] | |
13.6[1] · 13.92[3] | |
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.[1]
In the SMASS classification, Efimov is a Sa-type asteroid, which belong to the larger group of S-type asteroids.[1] It is also characterized as a L-type asteroid by PanSTARRS photometric survey.[5]
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.[3]
Efimov is a binary asteroid. In 2006, astronomers discovered a minor-planet moon, designated S/2006 (2754) 1 around Efimov using lightcurve observations, with a diameter of 1.29 kilometers and an orbital period of 14 hours and 46 minutes.[3][4]
This minor planet named in memory of Russian aviator Mikhail Nikiforovich Efimov (Russian: М. Н. Ефимов; 1881–1919), who was the first to realize steep turns and dives.[2][7]
The approved naming citation was published by the Minor Planet Center on 31 May 1988 (M.P.C. 13173).[8]