2754 Efimov
Main-belt asteroid
From Wikipedia, the free encyclopedia
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] | |
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]
Satellite
Efimov is a binary asteroid. In 2006, astronomers discovered a minor-planet moon around Efimov using lightcurve observations, with a diameter of 1.29 kilometers and an orbital period of 14 hours and 46 minutes.[3][4]
Naming
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]
