2296 Kugultinov

2296 Kugultinov, provisional designation 1975 BA1, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 20 kilometers in diameter.

2296 Kugultinov
Discovery [1]
Discovered byL. Chernykh
Discovery siteCrimean Astrophysical Obs.
Discovery date18 January 1975
Designations
(2296) Kugultinov
Named after
David Kugultinov
(Soviet poet)[2]
1975 BA1 · 1941 FM
1958 DF · 1975 CE
1978 RM1
main-belt · Themis [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc75.44 yr (27,556 days)
Aphelion3.7113 AU
Perihelion2.6512 AU
3.1813 AU
Eccentricity0.1666
5.67 yr (2,073 days)
180.53°
0° 10m 25.32s / day
Inclination1.2545°
42.238°
100.14°
Physical characteristics
Dimensions15.10±4.45 km[4]
20.51 km (calculated)[3]
21.07±1.77 km[5]
21.566±0.067 km[6][7]
8.43±0.02 h[8]
10 h[9]
16.850±0.004 h[10]
0.08 (assumed)[3]
0.083±0.004[6][7]
0.120±0.021[5]
0.12±0.06[4]
C [3]
11.3[5] · 11.6[6] · 11.7[1][3] · 11.77±0.23[11] · 1.80[3] · 11.94[4]

    It was discovered on 18 January 1975, by Russian astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory on the Crimean peninsula in Nauchnyj, and named after Soviet poet David Nikitich Kugultinov.[2][12]

    Classification and orbit

    Kugultinov is a carbonaceous C-type asteroid and member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.7–3.7 AU once every 5 years and 8 months (2,073 days). Its orbit has an eccentricity of 0.17 and an inclination of 1° with respect to the ecliptic.[1]

    Physical characteristics

    Diameter and albedo

    According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer and the Japanese Akari satellite, Kugultinov measures between 15.10 and 21.566 kilometers in diameter and its surface has an albedo between 0.083 and 0.12.[4][5][6][7] The Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.08 and calculates a diameter of 20.51 kilometers based an absolute magnitude of 11.8.[3]

    Lightcurves

    Three different rotational lightcurves of Kugultinov were obtain from photometric observations. The first, fragmentary lightcurve by Roberto Crippa and Federico Manzini in December 2013, gave a rotation period of 10 hours with a brightness variation of 0.03 magnitude (U=1).[9] In April 2015, the result was superseded by observations made by Kim Lang at the Klokkerholm Observatory in Denmark,[lower-alpha 1] and by a team at the U.S. University of Maryland using the iTelescope network,[lower-alpha 2] obtaining a period of 16.850 (U=2) and 8.4332±0.0224 hours (U=2+) with an amplitude of 0.23 and 0.19, respectively.[8][10] CALL considers the shorter period solution the better result.[3]

    Naming

    This minor planet was named after David Nikitich Kugultinov (1922–2006), prominent Soviet poet and national poet of the Republic of Kalmykia (also see 2287 Kalmykia).[2] The approved naming citation was published by the Minor Planet Center on 2 December 1990 (M.P.C. 17465).[13]

    Notes
    1. The minor planet 2296 Kugultinov was observed on 13 nights between 2015 March 13 and April 21. The analysis yielded a synodic period of rotation of P = 16.850 ± 0.004 h and amplitude of A = 0.23 mag. This result is in disagreement with a previously reported period of P = 10.41 h.
    2. Photometric observations of main-belt asteroid 2296 Kugultinov were made over a period of five nights spanning 2015 March 27 to April 20. The measured rotation period is 8.4332 ± 0.0224 h.

    References
    1. "JPL Small-Body Database Browser: 2296 Kugultinov (1975 BA1)" (2016-08-27 last obs.). Jet Propulsion Laboratory. Retrieved 3 July 2017.
    2. Schmadel, Lutz D. (2007). "(2296) Kugultinov". Dictionary of Minor Planet Names – (2296) Kugultinov. Springer Berlin Heidelberg. p. 187. doi:10.1007/978-3-540-29925-7_2297. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (2296) Kugultinov". Asteroid Lightcurve Database (LCDB). Retrieved 24 June 2016.
    4. Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 3 July 2017.
    5. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
    6. 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 24 June 2016.
    7. 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 7 December 2016.
    8. Hayes-Gehrke, Melissa N.; Chapin, Rebecca; Cromwell, Samuel; Castro, David; Spano, Francesca; Kyung, Justin; et al. (October 2015). "Rotation Period Determination for 2996 Kugultinov". The Minor Planet Bulletin. 42 (4): 241. Bibcode:2015MPBu...42Q.241H. ISSN 1052-8091. Retrieved 24 June 2016.
    9. Behrend, Raoul. "Asteroids and comets rotation curves – (2296) Kugultinov". Geneva Observatory. Retrieved 24 June 2016.
    10. Lang, Kim; Jacobsen, Jens (October 2015). "A New Synodic Period for 2296 Kugultinov". The Minor Planet Bulletin. 42 (4): 284–285. Bibcode:2015MPBu...42..284L. ISSN 1052-8091. Retrieved 24 June 2016.
    11. 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 24 June 2016.
    12. "2296 Kugultinov (1975 BA1)". Minor Planet Center. Retrieved 24 June 2016.
    13. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 June 2016.

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