2754 Efimov

2754 Efimov

Discovery [1]
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)[2]
Alternative designations	1966 PD · 1933 WF 1966 RB · 1973 YR1
Minor planet category	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
Semi-major axis	2.2274 AU
Eccentricity	0.2330
Orbital period (sidereal)	3.32 yr (1,214 days)
Mean anomaly	100.35°
Mean motion	0° 17^m 47.4^s / day
Inclination	5.7096°
Longitude of ascending node	275.17°
Argument of perihelion	91.098°
Known satellites	1[4]
Physical characteristics
Dimensions	4.98 km (derived)[3]
Synodic rotation period	2.44967 h (0.102070 d)[3]
Geometric albedo	0.20 (assumed)[3]
Spectral type	SMASS = Sa [1] · S [3] · L [5]
Absolute magnitude (H)	13.6[1] · 13.92[3]

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]

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, 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

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]

References

1. "JPL Small-Body Database Browser: 2754 Efimov (1966 PD)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Archived from the original on 20 September 2020. 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.

External links

• First in the sky: Mikhail Efimov is a pioneer of Russian aviation
• Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 2754 Efimov at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2754 Efimov at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters