Mikhail Efimov
| Discovery | |
|---|---|
| Discovered by | T. Smirnova |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 13 August 1966 |
| Designations | |
| MPC designation | (2754) Efimov |
|
Named after
|
Mikhail Efimov (Russian aviator) |
| 1966 PD · 1933 WF 1966 RB · 1973 YR1 |
|
| main-belt · (inner) | |
| Orbital characteristics | |
| 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 |
| Physical characteristics | |
| Dimensions | 4.98 km (derived) |
| 2.44967 h (0.102070 d) | |
| 0.20 (assumed) | |
| SMASS = Sa · S · L | |
| 13.6 · 13.92 | |
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. The asteroid was named after Russian aviator Mikhail Efimov.
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.
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.
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.
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