2754 Efimov

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]

2754 Efimov
Discovered byT. Smirnova
Discovery siteCrimean Astrophysical Obs.
Discovery date13 August 1966
(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 arc66.15 yr (24,160 days)
Aphelion2.7464 AU
Perihelion1.7085 AU
2.2274 AU
3.32 yr (1,214 days)
0° 17m 47.4s / day
Known satellites1[4]
Physical characteristics
Dimensions4.98 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]

    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.[1]

    Physical characteristics

    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]

    Mikhail Efimov (right) in 1910


    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]


    1. "JPL Small-Body Database Browser: 2754 Efimov (1966 PD)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 17 June 2017.
    2. Schmadel, Lutz D. (2007). "(2754) Efimov". Dictionary of Minor Planet Names – (2754) Efimov. Springer Berlin Heidelberg. p. 226. doi:10.1007/978-3-540-29925-7_2755. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (2754) Efimov". Asteroid Lightcurve Database (LCDB). Retrieved 17 June 2017.
    4. Johnston, Robert (21 September 2014). "(2754) Efimov". johnstonsarchive.net. Retrieved 17 June 2017.
    5. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 6 December 2016.
    6. "2754 Efimov (1966 PD)". Minor Planet Center. Retrieved 17 June 2017.
    7. "First Russian Aviator – Mikhail Nikiforovich Efimov (1881-1919) Bolshevik Revolutionary". thesanghakommune.org. Retrieved 17 June 2017.
    8. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 June 2017.

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