_Kuta%25C3%25AFssi.png) Modelled shape ofKutaïssi from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | G. Neujmin |
| Discovery site | Simeiz Obs. |
| Discovery date | 19 August 1933 |
| Designations | |
| (1289) Kutaïssi | |
Named after | Kutaisi(city inGeorgia)[2] |
| 1933 QR · 1928 QD 1948 TJ2 · 1953 TO2 A893 GA · A919 UC | |
| main-belt · Koronis[3] | |
| Orbital characteristics[1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.24 yr (32,228 days) |
| Aphelion | 3.0411AU |
| Perihelion | 2.6783 AU |
| 2.8597 AU | |
| Eccentricity | 0.0634 |
| 4.84yr (1,766 days) | |
| 113.61° | |
| 0° 12m 13.68s / day | |
| Inclination | 1.6165° |
| 193.19° | |
| 117.39° | |
| Physical characteristics | |
| 19.20±0.45 km[4] 21.531±0.269 km[5] 22.610±0.158 km[6] 22.97±0.56 km[7] 25.53 km(derived)[3] 25.62±1.8 km(IRAS:4)[8] | |
| 3.60 h[9] | |
| 0.1216(derived)[3] 0.1374±0.021(IRAS:4)[8] 0.1567±0.0371[6] 0.172±0.009[7] 0.245±0.023[4] | |
| 10.70±0.03(R)[10] · 10.73[1][4][7][8] · 10.87[3][6][9] | |
1289 Kutaïssi (prov. designation:1933 QR) is a stonyKoronian asteroid from the outer region of theasteroid belt. Discovered byGrigory Neujmin atSimeiz Observatory in 1933, it was later named after the Georgian city ofKutaisi. TheS-type asteroid has arotation period of 3.6 hours and measures approximately 22 kilometers (14 miles) in diameter.
Kutaïssi was discovered on 19 August 1933, by Soviet astronomerGrigory Neujmin atSimeiz Observatory on the Crimean peninsula.[11] It was independently discovered a few days later byEugène Delporte at the BelgianUccle Observatory on 25 August, as well as byCyril Jackson at the South AfricanJohannesburg Observatory on 11 September 1933.[2] It was first observed asA893 GA atHeidelberg in 1893. The body'sobservation arc begins with its observation as1928 QD at Simeiz in 1928, or 5 years prior to its official discovery observation.[11]
Kutaïssi is a stony member of theKoronis family, a group consisting of about 200 known bodies, thought to have been formed at least two billion years ago in a catastrophic collision between two larger bodies. It orbits the Sun in theouter main-belt at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,766 days). Its orbit has aneccentricity of 0.06 and aninclination of 2° with respect to theecliptic.[1]
Thisminor planet was named after the city ofKutaisi, now the legislative capital ofGeorgia, and its second largest city, after the capital Tbilisi.[2] The official naming citation was first mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 118).[2]
Kutaïssi is a common stonyS-type asteroid in theTholen classification.[1]
The first rotationallight curve ofKutaïssi was obtained fromphotometric observations by American astronomerRichard Binzel in February 1984. It gave arotation period of 3.60 hours with a brightness variation of 0.40magnitude (U=3).[9] In 1987 and 2004, a group of American astronomers obtained concurring light curves with a period of3.624±0.001 and3.624±0.006 hours and an amplitude of 0.30 and 0.42 magnitude, respectively (U=2/3).[10][12]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Kutaïssi measures between 19.20 and 25.62 kilometers in diameter, and its surface has analbedo between 0.1374 and 0.245.[4][5][6][7][8] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1216 and a diameter of 25.53 kilometers based on anabsolute magnitude of 10.87.[3]
