1118 Hanskya

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1118 Hanskya
Discovery [1]
Discovered by S. Belyavskyj
N. Ivanov
Discovery site Simeiz Obs.
Discovery date 29 August 1927
MPC designation (1118) Hanskya
Named after
Alexis Hansky
(Russian astronomer)[2]
1927 QD · 1930 DK
1935 BM
main-belt · (outer)[1]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 89.83 yr (32,810 days)
Aphelion 3.3560 AU
Perihelion 3.0694 AU
3.2127 AU
Eccentricity 0.0446
5.76 yr (2,103 days)
0° 10m 16.32s / day
Inclination 13.952°
Physical characteristics
Dimensions 70.954±0.220 km[3]
75.495±1.037 km[4]
77.03 km (derived)[5]
77.20±1.7 km[6]
79.80±1.04 km[7]
82.14±23.50 km[8]
82.70±28.83 km[9]
90.29±0.59 km[10]
15.61±0.01 h[11]
25.31±0.05 h[12]
25.3481±0.0598 h[13]
0.0358 (derived)[5]
9.5[4][6][7] · 9.70[10] · 9.710±0.002 (R)[13] · 9.80[5][8] · 9.9[1] · 9.97[9]

1118 Hanskya, provisional designation 1927 QD, is a dark background asteroid from the outer regions of the asteroid belt, approximately 77 kilometers in diameter. Discovered by Sergey Belyavsky and Nikolaj Ivanov in 1927, it was named after Russian astronomer Aleksey Hansky.


Hanskya was discovered on 29 August 1927, by Russian astronomers Sergey Belyavsky and Nikolaj Ivanov at the Simeiz Observatory on the Crimean peninsula.[14] The asteroid was independently discovered by two other prolific astronomers in the field, namely Karl Reinmuth at the German Heidelberg Observatory – who observed the body only one day later and announced it first – and by Belgian astronomer Eugène Delporte at Uccle Observatory on 17 September.[2]

Orbit and classification[edit]

The asteroid has not been identified as a member of any known asteroid family. It orbits the Sun in the outer main belt at a distance of 3.1–3.4 AU once every 5 years and 9 months (2,103 days). Its orbit has an eccentricity of 0.04 and an inclination of 14° with respect to the ecliptic.[1]

The body's observation arc begins at Heidelberg or Simeiz one night after its official discovery observation.[14]

Physical characteristics[edit]

Hanskya is an assumed carbonaceous C-type asteroid.[5]

Rotation period[edit]

In October 21010, a rotational lightcurve of Hanskya was obtained from photometric observations at the Sunflower Observatory in Kansas, United States (739). Lightcurve analysis gave a rotation period of 15.61 hours with a brightness amplitude of 0.18 magnitude (U=2).[11]

More recent observations at the Palomar Transient Factory and by French amateur astronomer René Roy gave a longer period of 25.31 and 25.3481 hours and an amplitude of 0.38 and 0.25, respectively (U=2/2).[12][13]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Hanskya measures between 70.954 and 90.29 kilometers in diameter and its surface has an albedo between 0.029 and 0.056.[3][4][6][7][8][9][10]

The Collaborative Asteroid Lightcurve Link derives a low albedo of 0.0358 and a diameter of 77.03 kilometers based on an absolute magnitude of 9.8.[5]


This minor planet was named on the 25th anniversary of the death of Russian Aleksey Hansky (1870–1908), whose initiative lead to the construction of the discovering Simeiz Observatory.[2]


  1. ^ a b c d e "JPL Small-Body Database Browser: 1118 Hanskya (1927 QD)" (2017-06-28 last obs.). Jet Propulsion Laboratory. Retrieved 17 August 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1118) Hanskya. Springer Berlin Heidelberg. p. 95. ISBN 978-3-540-00238-3. Retrieved 14 September 2016. 
  3. ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 14 September 2016. 
  4. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 14 September 2016. 
  5. ^ a b c d e f "LCDB Data for (1118) Hanskya". Asteroid Lightcurve Database (LCDB). Retrieved 14 September 2016. 
  6. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 14 September 2016. 
  7. ^ a b c d 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 14 September 2016. 
  8. ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522Freely accessible. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 29 August 2017. 
  9. ^ a b c d 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:1606.08923Freely accessible. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 29 August 2017. 
  10. ^ a b c d 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 14 September 2016. 
  11. ^ a b Robinson, L. E. (June 2002). "Lightcurve Photometry of 551 Ortrud, 1118 Hanskya, and 1916 Boreas from Sunflower Observatory". The Minor Planet Bulletin. 29: 37–38. Bibcode:2002MPBu...29...37R. Retrieved 14 September 2016. 
  12. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1118) Hanskya". Geneva Observatory. Retrieved 14 September 2016. 
  13. ^ a b c 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 14 September 2016. 
  14. ^ a b "1118 Hanskya (1927 QD)". Minor Planet Center. Retrieved 29 August 2017. 

External links[edit]