| Discovery[1] | |
|---|---|
| Discovered by | L. G. Karachkina |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 6 October 1986 |
| Designations | |
| (4997) Ksana | |
Named after | Kseniya A. Nessler (Russian chemist)[2] |
| 1986 TM | |
| main-belt · (outer)[3] Pallas[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 30.57 yr (11,165 days) |
| Aphelion | 3.8162AU |
| Perihelion | 1.9285 AU |
| 2.8723 AU | |
| Eccentricity | 0.3286 |
| 4.87yr (1,778 days) | |
| 97.646° | |
| 0° 12m 9s / day | |
| Inclination | 32.828° |
| 10.897° | |
| 57.447° | |
| Physical characteristics | |
| Dimensions | 7.36±2.79 km[5] 9.860±0.160 km[6][7] 9.97±0.33 km[8] 10±1 km[9] 14.64 km(calculated)[3] |
| 3.4342±0.0003h[10] | |
| 0.057(assumed)[3] 0.16±0.03[9] 0.271±0.206[5] 0.312±0.022[8] 0.3157±0.0548[7] 0.316±0.055[6] | |
| SMASS =B[1] · B[3] | |
| 11.9[3][7][8] · 12.70[5][9] · 12.79±0.30[11] · 13.0[1] | |
4997 Ksana, provisional designation1986 TM, is a carbonaceous Palladianasteroid from the outer region of theasteroid belt, approximately 10 kilometers in diameter. It was discovered on 6 October 1986, by Russian astronomerLyudmila Karachkina atCrimean Astrophysical Observatory on the Crimean peninsula.[12] The asteroid was named for Russian chemistKseniya Nessler.[2]
Ksana is a small member of thePallas family (801), a smallasteroid family of carbonaceous B-type asteroids.[4][13]: 23 It orbits the Sun in theouter main-belt at a distance of 1.9–3.8 AU once every 4 years and 10 months (1,778 days). Its orbit has aneccentricity of 0.33 and aninclination of 33° with respect to theecliptic.[1]As noprecoveries were taken, the asteroid'sobservation arc begins with its discovery observation in 1986.[12]
On theSMASS taxonomic scheme,Ksana is aB-type asteroid, which are primitive, volatile-rich asteroids.[1] This also agrees with the overallspectral type of the Pallas family.[13]: 23
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Ksana measures between 7.36 and10±1 kilometers in diameter and its surface has analbedo between 0.16 and 0.316.[5][6][7][8][9]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a larger diameter of 14.64 kilometers with anabsolute magnitude of 12.9.[3]
In February 2007, a rotationallightcurve ofKsana was obtained from photometric observations by Italian astronomer Federico Manzini at the SAS observatory in Novara, Italy. It gave it arotation period of3.4342±0.0003 hours with a brightness variation of 0.21 inmagnitude (U=2).[10]
Thisminor planet was named by the discoverer for his friend, the Russian chemist Kseniya Andreevna Nessler, who has been an advocate against environmental pollution. The asteroid's name "Ksana" is a variation of Kseniya (Ксения), the equivalent to the romanizedXenia.[2] The official naming citation was published by theMinor Planet Center on 1 September 1993 (M.P.C. 22505 and 22609).[14]
