| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 24 January 1930 |
| Designations | |
| (1142) Aetolia | |
| Pronunciation | /iːˈtoʊliə/[2] |
Named after | Aetolia(Greek region)[3] |
| 1930 BC · 1931 LC 1937 LN · 1937 LU 1942 GF · 1942 GS 1943 PF · 1948 JS 1948 KG · 1954 KJ 1954 MU · 1958 BB A902 GB · A907 CB A908 GB | |
| main-belt · (outer)[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 115.24 yr (42,093 days) |
| Aphelion | 3.4423AU |
| Perihelion | 2.9265 AU |
| 3.1844 AU | |
| Eccentricity | 0.0810 |
| 5.68yr (2,076 days) | |
| 90.209° | |
| 0° 10m 24.24s / day | |
| Inclination | 2.1096° |
| 139.34° | |
| 96.492° | |
| Physical characteristics | |
| Dimensions | 22.135±0.133 km[5] 23.764±0.124 km[6] 24.92±1.57 km[7] 27.10 km(calculated)[4] |
| 7.68±0.12 h[8] 10.730±0.005 h[9] 10.74±0.02h[10] | |
| 0.20(assumed)[4] 0.216±0.029[7] 0.2439±0.0610[6] 0.273±0.034[5] | |
| S[4][11] | |
| 9.95±0.07(R)[8] · 10.2[1][4] · 10.30[6][7] · 10.35±0.29[11] | |
1142 Aetolia, provisional designation1930 BC, is a stony backgroundasteroid from the outer region of theasteroid belt, approximately 24 kilometers in diameter. It was discovered on 24 January 1930, by German astronomerKarl Reinmuth at theHeidelberg-Königstuhl State Observatory and named for the Greek regionAetolia.[3][12]
Aetolia has not been associated with any knownasteroid family. It orbits the Sun in theouter main-belt at a distance of 2.9–3.4 AU once every 5 years and 8 months (2,076 days). Its orbit has aneccentricity of 0.08 and aninclination of 2° with respect to theecliptic.[1]
The asteroid was first identified asA902 GB at Heidelberg in April 1902. The body'sobservation arc begins at theUSNO in May 1908, or 22 years prior to its official discovery observation.[12]
Aetolia has been characterized as a common stonyS-type asteroid byPan-STARRS photometric survey.[11]
In May 2010, two rotationallightcurves ofAetolia were independently obtained from photometric observations by French amateur astronomerRené Roy and by Russell Durkee at the S.O.S. Observatory (H39) near Minneapolis, United States. Lightcurve analysis gave arotation period of 10.730 and 10.74 hours with a brightness variation of 0.20 and 0.22 inmagnitude, respectively (U=3-/3-).[9][10] A more recent and lower-rated observation gave a divergent period of 7.68 hours (U=2).[8]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Aetolia measures between 22.135 and 24.92 kilometers in diameter and its surface has analbedo between 0.216 and 0.273.[5][6][7]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 27.10 kilometers based on anabsolute magnitude of 10.2.[4]
Thisminor planet was named after the Greek regionAetolia, north of theGulf of Patras. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 107).[3]
