| Discovery[1] | |
|---|---|
| Discovered by | R. M. West |
| Discovery site | La Silla Obs. |
| Discovery date | 24 October 1976 |
| Designations | |
| (2052) Tamriko | |
Named after | Tamara West (discoverer's wife)[2] |
| 1976 UN · 1928 TD 1939 YA · 1942 JE 1949 UV · 1951 CP1 1952 FL · 1952 HL2 1954 TS · 1975 WB2 A902 UB | |
| main-belt · (outer) Eos[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 114.10 yr (41,676 days) |
| Aphelion | 3.2627AU |
| Perihelion | 2.7529 AU |
| 3.0078 AU | |
| Eccentricity | 0.0848 |
| 5.22yr (1,905 days) | |
| 340.25° | |
| 0° 11m 20.04s / day | |
| Inclination | 9.5008° |
| 213.86° | |
| 204.82° | |
| Physical characteristics | |
| Dimensions | 26.799±0.156 km[5] 27.51±0.50 km[6] 27.574±0.238 km[7] 29.11±5.31 km[8] 30.45±2.2 km(IRAS:3)[9] |
| 7.462±0.003h[10] 7.470±0.002 h[11][a] 7.4702±0.0004 h[12] 7.471±0.001 h[12] | |
| 0.1225±0.020(IRAS:3)[9] 0.144±0.190[8] 0.150±0.006[6] 0.1508±0.0467[7] 0.158±0.025[5] | |
| Tholen =S[1] · S[3] B–V = 0.825[1] U–B = 0.433[1] | |
| 10.40[8] · 10.48[1][3][6][7][9] · 10.57±0.18[13] | |
2052 Tamriko, provisional designation1976 UN, is a stony Eoanasteroid from the outer regions of theasteroid belt, approximately 27 kilometers in diameter. It was discovered on 24 October 1976, byRichard Martin West atESO'sLa Silla Observatory in northern Chile.[14] The asteroid was named after the discoverer's wife Tamara West.[2]
Tamriko is a member of theEos family (606), the largestasteroid family in theouter main belt consisting of nearly 10,000 asteroids.[4][15]: 23 It orbits the Sun in theouter main-belt at a distance of 2.8–3.3 AU once every 5 years and 3 months (1,905 days). Its orbit has aneccentricity of 0.08 and aninclination of 10° with respect to theecliptic.[1]
The asteroid was first identified asA902 UB atHeidelberg Observatory in October 1902. Itsobservation arc begins 24 years prior to the official discovery observation, with its identification1952 FL atGoethe Link Observatory in March 1952.[14]
In theTholen classification,Tamriko is a stonyS-type asteroid.[1]
Between 2001 and 2011, four rotationallightcurve ofTamriko were obtained from photometric observations byEdwin Sheridan,Pierre Antonini,Laurent Bernasconi andBrian Warner. Lightcurve analysis gave arotation period between 7.462 and 7.471 hours with a brightness variation between 0.11 and 0.15magnitude (U=2/2/2/2).[10][11][12][a]
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,Tamriko measures between 26.799 and 30.45 kilometers in diameter and its surface has analbedo between 0.1225 and 0.158.[5][6][7][8][9]
TheCollaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, a standard albedo of 0.1225 and a diameter of 30.45 kilometers with anabsolute magnitude of 10.48.[3]
Thisminor planet was named for Tamara West, wife of the discovererRichard Martin West.[2] The officialnaming citation was published by theMinor Planet Center on 1 July 1979 (M.P.C. 4786).[16]
