7385 Aktsynovia

7385 Aktsynovia, provisional designation 1981 UQ11, is a background asteroid from the inner regions of the asteroid belt, approximately between 4 and 9 kilometers in diameter, depending on its assumed spectral type. It was discovered on 22 October 1981, by Soviet–Russian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula.[9]

7385 Aktsynovia
Discovery [1]
Discovered byN. Chernykh
Discovery siteCrimean Astrophysical Obs.
Discovery date22 October 1981
Designations
(7385) Aktsynovia
Named after
Lyudmila Aktsynova
Arkadij Aktsynov
(Russian painters)[2]
1981 UQ11 · 1990 DP1
main-belt · (inner) [3]
background
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc34.58 yr (12,632 days)
Aphelion2.6909 AU
Perihelion2.0873 AU
2.3891 AU
Eccentricity0.1263
3.69 yr (1,349 days)
222.56°
0° 16m 0.84s / day
Inclination3.7338°
77.933°
357.05°
Physical characteristics
Dimensions3.98 km (calculated)[3]
8.57±2.04 km[4]
8.854±0.115 km[5][6]
4.1186±0.0008 h[7]
0.057±0.011[5][6]
0.073±0.034[4]
0.20 (assumed)[3]
S [3]
14.0[1][5] · 14.02±0.56[8] · 13.80[4] · 13.918±0.002 (R)[7] · 14.37[3]

    Orbit and classification

    Aktsynovia is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,349 days). Its orbit has an eccentricity of 0.13 and an inclination of 4° with respect to the ecliptic.[1] No precovery was ever taken for this asteroid.[9]

    Naming

    This minor planet was named in memory of Russian artist couple Lyudmila and Arkadij Aktsynov (both 1910–1997), who were masters in landscape painting and portrait painting. Their landscape art depicted the regions of Siberia, Baikal, Sayany, Altaj and Volga.[2] The official naming citation was published by the Minor Planet Center on 24 January 2000 (M.P.C. 38196).[10]

    Physical characteristics

    Diameter and albedo

    According to the survey carried out by NASA's spaced-based Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, Aktsynovia measures 8.9 and 8.6 kilometers in diameter, respectively, with a corresponding albedo of 0.06 and 0.07.[4][5][6] However, rather than classifying the body as a C-type asteroid, the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a much smaller diameter of 4.0 kilometers with an absolute magnitude of 14.37.[3]

    Rotation period

    A rotational lightcurve of Aktsynovia was obtained from photometric observations made at the U.S. Palomar Transient Factory in December 2011. The lightcurve gave a rotation period of 4.1186±0.0008 hours with a brightness amplitude of 0.32 in magnitude (U=2).[7]

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    References
    1. "JPL Small-Body Database Browser: 7385 Aktsynovia (1981 UQ11)" (2016-05-23 last obs.). Jet Propulsion Laboratory. Retrieved 22 June 2017.
    2. Schmadel, Lutz D. (2007). "(7385) Aktsynovia". Dictionary of Minor Planet Names – (7385) Aktsynovia. Springer Berlin Heidelberg. p. 594. doi:10.1007/978-3-540-29925-7_6460. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (7385) Aktsynovia". Asteroid Lightcurve Database (LCDB). Retrieved 4 May 2016.
    4. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 4 May 2016.
    5. Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 4 May 2016.
    6. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 5 December 2016.
    7. Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 4 May 2016.
    8. 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 4 May 2016.
    9. "7385 Aktsynovia (1981 UQ11)". Minor Planet Center. Retrieved 4 May 2016.
    10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 May 2016.

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