_Augusta.png) Modelled shape of Augusta from its lightcurve | |
| Discovery [1] | |
|---|---|
| Discovered by | J. Palisa |
| Discovery site | Vienna Obs. |
| Discovery date | 31 March 1886 |
| Designations | |
| (254) Augusta | |
| Pronunciation | /ɒˈɡʌstə/[2] |
Named after | Auguste von Littrow [3] |
| A886 FA | |
| Augusta · main-belt | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.04 yr (47498 d) |
| Aphelion | 2.4613 AU (368.21 Gm) |
| Perihelion | 1.9281 AU (288.44 Gm) |
| 2.1947 AU (328.32 Gm) | |
| Eccentricity | 0.12147 |
| 3.25 yr (1187.5 d) | |
Average orbital speed | 20.1 km/s[citation needed] |
| 340.92° | |
| 0° 18m 11.34s / day | |
| Inclination | 4.5131° |
| 28.473° | |
| 233.14° | |
| Earth MOID | 0.916708 AU (137.1376 Gm) |
| Jupiter MOID | 2.58938 AU (387.366 Gm) |
| TJupiter | 3.656 |
| Physical characteristics | |
| Dimensions | 12.11±1.1 km |
| 5.8949 h (0.24562 d) | |
| 0.1695±0.036 | |
| B–V = 0.845 U–B = 0.505 Tholen = S | |
| 12.13 | |
254 Augusta is a main-belt asteroid, discovered on 31 March 1886 by astronomer Johann Palisa at Vienna Observatory, Austria. The stony S-type asteroid measures about 12 kilometers in diameter.[1] It is the first-numbered member of the Augusta family, after which the small Asteroid family and subgroup of the main-belt has been named. Augusta was named after the German–Austrian writer Auguste von Littrow (1819–1890), widow of astronomer Carl Ludwig von Littrow, who was a former director of the Vienna Observatory.[3]