| Discovery[1] | |
|---|---|
| Discovered by | M. Itzigsohn |
| Discovery site | La Plata Obs. |
| Discovery date | 13 September 1950 |
| Designations | |
| (1589) Fanatica | |
Named after | Eva Perón (Argentine idol)[2] |
| 1950 RK · 1935 RD 1937 CF · 1946 OE 1950 TM3 · A924 WC | |
| main-belt · Vestian[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 92.30 yr (33,713 days) |
| Aphelion | 2.6415AU |
| Perihelion | 2.1918 AU |
| 2.4167 AU | |
| Eccentricity | 0.0930 |
| 3.76yr (1,372 days) | |
| 268.75° | |
| 0° 15m 44.28s / day | |
| Inclination | 5.2629° |
| 90.323° | |
| 289.75° | |
| Physical characteristics | |
| Dimensions | 9.31±0.40 km[4] 10.698±0.125 km[5] 11.446±0.086 km[6] 12.16±0.76 km[7] 12.39 km(calculated)[3] |
| 2.58±0.05h[8] 2.582±0.001 h[9] | |
| 0.189±0.025[7] 0.20(assumed)[3] 0.2609±0.0374[6] 0.294±0.012[5] 0.388±0.054[4] | |
| S[3] | |
| 11.8[4][6] · 11.9[1][3] · 12.00[7] | |
1589 Fanatica, provisional designation1950 RK, is a stony, Vestianasteroid from the inner regions of theasteroid belt, approximately 11 kilometers in diameter. It was discovered on 13 September 1950, by Argentine astronomerMiguel Itzigsohn atLa Plata Astronomical Observatory in La Plata, Argentina.[10] It was named afterEva Perón.[2]
Based on its orbital elements,Fanatica is aS-type member of theVesta family, which is named after4 Vesta, the third largest body in the main-belt after the dwarf planet1 Ceres and the minor planet2 Pallas.Fanatica orbits the Sun at a distance of 2.2–2.6 AU once every 3 years and 9 months (1,372 days). Its orbit has aneccentricity of 0.09 and aninclination of 5° with respect to theecliptic.[1] It was first identified asA924 WC atHeidelberg Observatory in 1924, extending the body'sobservation arc by 26 years prior to its official discovery observation at La Plata.[10]
In November 2003, a rotationallightcurve ofFanatica was obtained by astronomerBrian Warner at his Palmer Divide Observatory in Colorado. The light-curve analysis gave arotation period of 2.58 hours with a brightness variation of 0.16magnitude (U=3).[8] In August 2014, photometric observations by astronomerRobert Stephens gave a period of 2.582 hours and change in brightness of 0.18 magnitude (U=3).[9]
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Fanatica measures between 9.31 and 12.16 kilometers in diameter, and its surface has analbedo between 0.189 and 0.388.[4][5][6][7] TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 12.39 kilometers, using an absolute magnitude of 11.9.[3]
Thisminor planet was named in reference to Argentine legend,Eva Perón (1919–1952), also known as "Evita", wife of Argentine President Juan Perón, First Lady of Argentina and idolized by millions.[2] The asteroids1569 Evita,1581 Abanderada,1582 Martir and1588 Descamisada were also discovered by Itzigsohn, and were also given names in tribute to Perón. The officialnaming citation was published by theMinor Planet Center in April 1954 (M.P.C. 1069).[11]
