| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 21 May 1928 |
| Designations | |
| (1304) Arosa | |
Named after | Arosa(Swiss village)[2] |
| 1928 KC · 1929 RY 1934 JL · 1934 LE 1974 OW · A908 YC | |
| main-belt · (outer)[3] background[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.22 yr (39,526 days) |
| Aphelion | 3.5731AU |
| Perihelion | 2.8226 AU |
| 3.1978 AU | |
| Eccentricity | 0.1173 |
| 5.72yr (2,089 days) | |
| 207.15° | |
| 0° 10m 20.64s / day | |
| Inclination | 18.991° |
| 86.580° | |
| 148.26° | |
| Physical characteristics | |
| Dimensions | 31.47±3.06 km[5] 41.67 km(derived)[3] 42.94±1.9 km[6] 43.613±0.241 km[7] 48.35±0.81 km[8] 57.443±1.462 km[9] |
| 7.74 h[10] 7.7478±0.0001 h[11][12] 7.77±0.04h[11] | |
| 0.1961±0.0279[9] 0.2125(derived)[3] 0.279±0.011[8] 0.337±0.031[7] 0.3480±0.033[6] 0.409±0.084[5] | |
| SMASS =X[1][3] · M[9] | |
| 8.6[6][8][9][13] · 9.03±0.27[14] · 9.10[5] · 9.2[1][3] | |
1304 Arosa, provisional designation1928 KC, is a metallicasteroid from the outer region of theasteroid belt, approximately 40 kilometers in diameter. It was discovered on 21 May 1928, by German astronomerKarl Reinmuth atHeidelberg Observatory in southwest Germany.[15] It was named after the Swiss mountain village ofArosa.[2]
Arosa is a non-family asteroid from the main belt'sbackground population.[4] It orbits the Sun in theouter asteroid belt at a distance of 2.8–3.6 AU once every 5 years and 9 months (2,089 days;semi-major axis of 3.20 AU). Its orbit has aneccentricity of 0.12 and aninclination of 19° with respect to theecliptic.[1] It was first identified asA908 YC at the discovering observatory in 1908, extending the body'sobservation arc by 20 years prior to its official discovery.[15]
In theSMASS taxonomy,Arosa is classified as a genericX-type asteroid. TheWide-field Infrared Survey Explorer (WISE) groups it into the metallicM-type asteroid subcategory.[1][9]
Several rotationallightcurves were obtained from photometric observations between 2002 and 2006. Lightcurve analysis gave a well-definedrotation period of 7.74 hours with a brightness amplitude between 0.32 and 0.38magnitude (U=3/3/3/2).[10][11][12]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA's WISE space telescope with itsNEOWISE mission,Arosa measures between 31.47 and 57.443 kilometers in diameter, and its surface has analbedo between 0.1961 and 0.409.[5][6][7][8][9] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.2125 and a diameter of 41.67 kilometers, using anabsolute magnitude of 9.2.[3]
Thisminor planet was named for the Swiss mountain village ofArosa, a summer and a winter tourist resort in theSwiss Alps. The official naming citation was also mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 119).[2]
{{cite web}}:|archive-url= is malformed: timestamp (help)CS1 maint: url-status (link)