_Hanskya.png) Shape model ofHanskya from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | S. Belyavskyj N. Ivanov |
| Discovery site | Simeiz Obs. |
| Discovery date | 29 August 1927 |
| Designations | |
| (1118) Hanskya | |
Named after | Alexis Hansky (Russian astronomer)[2] |
| 1927 QD · 1930 DK 1935 BM | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 89.83 yr (32,810 days) |
| Aphelion | 3.3560AU |
| Perihelion | 3.0694 AU |
| 3.2127 AU | |
| Eccentricity | 0.0446 |
| 5.76yr (2,103 days) | |
| 306.45° | |
| 0° 10m 16.32s / day | |
| Inclination | 13.952° |
| 318.76° | |
| 335.05° | |
| Physical characteristics | |
| 70.954±0.220km[6] 75.495±1.037 km[7] 77.03 km(derived)[8] 77.20±1.7 km[9] 79.80±1.04 km[10] 82.14±23.50 km[11] 82.70±28.83 km[12] 90.29±0.59 km[13] | |
| 15.61±0.01 h[14] | |
| 0.029±0.005[13] 0.03±0.06[12] 0.0358(derived)[8] 0.04±0.02[11] 0.045±0.001[10] 0.0470±0.002[9] 0.0491±0.0084[7] 0.056±0.003[6] | |
| C[8] | |
| 9.5[7][9][10] · 9.70[13] · 9.710±0.002(R)[15] · 9.80[8][11] · 9.9[1] · 9.97[12] | |
1118 Hanskya (prov. designation:1927 QD) is a largebackground asteroid, approximately 77 kilometers (48 miles) in diameter, located in the outer regions of theasteroid belt. Discovered bySergey Belyavsky andNikolaj Ivanov in 1927, it was named after Russian astronomerAleksey Hansky. The presumed darkC-type asteroid has arotation period of 15.6 hours.
Hanskya was discovered on 29 August 1927, by Russian astronomersSergey Belyavsky andNikolaj Ivanov at theSimeiz Observatory on the Crimean peninsula.[3] The asteroid was independently discovered by two other prolific astronomers in the field, namelyKarl Reinmuth at the GermanHeidelberg Observatory – who observed the body only one day later and announced it first – and by Belgian astronomerEugène Delporte atUccle Observatory on 17 September.[2]
Hanskya is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[4][5] It orbits the Sun in theouter asteroid belt at a distance of 3.1–3.4 AU once every 5 years and 9 months (2,103 days). Its orbit has aneccentricity of 0.04 and aninclination of 14° with respect to theecliptic.[1]
The body'sobservation arc begins at Heidelberg or Simeiz one night after its official discovery observation.[3]
Thisminor planet was named on the 25th anniversary of the death of RussianAleksey Hansky (1870–1908), whose initiative lead to the construction of the discovering Simeiz Observatory.[2]
Hanskya is an assumed carbonaceousC-type asteroid.[8]
In October 21010, a rotationallightcurve ofHanskya was obtained from photometric observations at theSunflower Observatory in Kansas, United States (739). Lightcurve analysis gave arotation period of 15.61 hours with a brightness amplitude of 0.18magnitude (U=2).[14]
More recent observations at thePalomar Transient Factory and by French amateur astronomerRené 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).[16][15]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Hanskya measures between 70.954 and 90.29 kilometers in diameter and its surface has analbedo between 0.029 and 0.056.[6][7][9][10][11][12][13]
TheCollaborative Asteroid Lightcurve Link derives a low albedo of 0.0358 and a diameter of 77.03 kilometers based on anabsolute magnitude of 9.8.[8]
