| Discovery[1] | |
|---|---|
| Discovered by | M. Wolf F. Schwassmann |
| Discovery site | Heidelberg Obs. |
| Discovery date | 15 September 1900; 125 years ago (1900-09-15) |
| Designations | |
| (457) Alleghenia | |
| Pronunciation | /æləˈɡeɪniə/[2] |
Named after | Allegheny, Pennsylvania (John Brashear optics)[3] |
| 1900 FJ · 1938 SA | |
| main-belt · (outer)[4] | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 115.57 yr (42213 d) |
| Aphelion | 3.6339 AU (543.62 Gm) |
| Perihelion | 2.5553 AU (382.27 Gm) |
| 3.0946 AU (462.95 Gm) | |
| Eccentricity | 0.17427 |
| 5.44yr (1988.4d) | |
| 104.03° | |
| 0° 10m 51.78s / day | |
| Inclination | 12.919° |
| 249.70° | |
| 128.67° | |
| Earth MOID | 1.58071 AU (236.471 Gm) |
| Jupiter MOID | 1.92316 AU (287.701 Gm) |
| TJupiter | 3.162 |
| Physical characteristics | |
| Dimensions | 33.54 km(calculated)[4] |
| 21.953±0.001h[5] 21.953 h (0.9147 d)[1] | |
| 0.057(assumed)[4] | |
| C[4] | |
| 11.1[1] | |
457 Alleghenia, provisional designation 1900 FJ, is a carbonaceousasteroid from the outer region of theasteroid belt, about 34 kilometers in diameter. It was discovered on 15 September 1900, by German astronomersMax Wolf andFriedrich Schwassmann atHeidelberg Observatory in southern Germany.[6]
TheC-type asteroid orbits the Sun at a distance of 2.6–3.6 AU once every 5 years and 5 months (1,987 days). Its orbit istilted by 13 degrees to the plane of theecliptic and shows aneccentricity of 0.17. Based on assumptions made by theCollaborative Asteroid Lightcurve Link, the body has a lowalbedo of 0.06, a typical value for a carbonaceous asteroid.[4] In 2014, photometriclight-curve observations at the Los Algarrobos Observatory (OLASU,I38), Uruguay, has given arotation period of21.953±0.001 hours with a brightness amplitude of 0.20 inmagnitude. It was the last among the first 500 numbered asteroids to have its period measured for the first time(also see398 Admete).[5]
The minor planet was named by Max Wolf in honor and gratitude of U.S. opticianJohn Brashear atAllegheny in Pennsylvania, who equipped Wolf's new telescope with state of the art optics (lenses for the 16-inch photographic doublet). Some of the finest astronomy equipment of the early 20th century were produced at Allegheny by Brashear. The body was the first discovery Wolf made with his new instrument.[a] Wolf also expressed his gratitude by granting the naming of another of his discoveries to the American optician, who named it484 Pittsburghia, after his home city. Brashear is also honored bya Martian anda lunar crater.[3] The minor planet5502 Brashear was later directly named after the famous American astronomer and instrument builder.
_mathilde.jpg) | This article about an asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
