| Discovery[1] | |
|---|---|
| Discovered by | T. Urata |
| Discovery site | Nihondaira Obs. |
| Discovery date | 30 December 1992 |
| Designations | |
| (6025) Naotosato | |
Named after | Naoto Satō (Japanese astronomer)[2] |
| 1992 YA3 · 1954 SG1 1965 UO · 1977 BK 1983 EE1 · 1986 TL11 1987 YS2 · 1990 HF2 1991 RS29 | |
| main-belt · Eos[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.68 yr (22,895 days) |
| Aphelion | 3.2334AU |
| Perihelion | 2.8116 AU |
| 3.0225 AU | |
| Eccentricity | 0.0698 |
| 5.25yr (1,919 days) | |
| 276.73° | |
| 0° 11m 15.36s / day | |
| Inclination | 8.9985° |
| 280.24° | |
| 160.02° | |
| Physical characteristics | |
| Dimensions | 17.80 km(calculated)[3] 18.442±0.135[4] 19.90±0.91 km[5] 19.968±0.172 km[6] |
| 10h[7] | |
| 0.14(assumed)[3] 0.1475±0.0099[6] 0.162±0.016[5] 0.188±0.040[4] | |
| S[3] | |
| 11.2[5][6] · 11.5[1][3] · 11.70±0.28[8] | |
6025 Naotosato, provisional designation1992 YA3, is an Eoanasteroid from the outer region of theasteroid belt, approximately 19 kilometers in diameter. It was discovered on 30 December 1992, by Japanese astronomerTakeshi Urata at theNihondaira Observatory in Oohira, Japan.[9] The asteroid was named after Japanese amateur astronomerNaoto Satō.[2]
Naotosato is a member of theEos family (606), the largestasteroid family in theouter main belt, consisting of nearly 10,000 asteroids.
It orbits the Sun at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,919 days). Its orbit has aneccentricity of 0.07 and aninclination of 9° with respect to theecliptic.[1] The first observation was made atGoethe Link Observatory in 1954, extending the asteroid'sobservation arc by 38 years prior to its discovery.[9]
In September 2009, a rotationallightcurve ofNaotosato was obtained from photometric observations by French astronomerRené Roy. The fragmentary lightcurve gave a longer-than averagerotation period of 10 hours with a brightness amplitude of 0.20 inmagnitude (U=1).[7]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Naotosato measures between 18.4 and 20.0 kilometers in diameter and its surface has analbedo between 0.148 and 0.188,[4][5][6] while theCollaborative Asteroid Lightcurve Link assumes an albedo of 0.14 and calculates a diameter of 17.8 kilometers with anabsolute magnitude of 11.5.[3]
Thisminor planet was named after Japanese amateur astronomerNaoto Satō (born 1953), by profession a junior high school science teacher and a prolificdiscoverer of minor planets from his private Chichibu Observatory himself. He has also prediscoveredC/1989 Y2, aparabolic comet credited to McKenzie–Russell.[2] The official naming citation was published by theMinor Planet Center on 2 February 1999 (M.P.C. 33786).[10]
