| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 3 March 1924 |
| Designations | |
| (1018) Arnolda | |
Named after | Arnold Berliner (German physicist)[2] |
| 1924 QM · 1926 VK 1952 BV1 | |
| main-belt · (central)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 93.34 yr (34,092 days) |
| Aphelion | 3.1649AU |
| Perihelion | 1.9180 AU |
| 2.5414 AU | |
| Eccentricity | 0.2453 |
| 4.05yr (1,480 days) | |
| 204.40° | |
| 0° 14m 35.88s / day | |
| Inclination | 7.6444° |
| 359.70° | |
| 342.97° | |
| Physical characteristics | |
| Dimensions | 13.68±2.45 km[4] 15.29±0.53 km[5] 16.387±0.100 km[6] 16.42±1.5 km[7] 16.44 km(derived)[3] 16.557±0.224 km[8] |
| 10h(unrated)[9] 11.97 h(dated)[10] 12.18±0.01 h[9] 14.57±0.01 h[a] 14.617±0.004 h[11] | |
| 0.29±0.13[4] 0.3701±0.079[7] 0.371±0.037[8] 0.3760(derived)[3] 0.3857±0.0329[6] 0.439±0.034[5] | |
| S[3] | |
| 10.60[3][6][10] · 10.62[1][5][7] · 11.30[4] · 11.45±0.25[12] | |
1018 Arnolda, provisional designation1924 QM, is a stonyasteroid from the central regions of theasteroid belt, approximately 16 kilometers in diameter. It was discovered on 3 March 1924, by German astronomerKarl Reinmuth at theHeidelberg-Königstuhl State Observatory in southwest Germany.[13] The asteroid was named after physicistArnold Berliner.[2]
Arnolda is not a member of any knownasteroid family. It orbits the Sun in thecentral main belt at a distance of 1.9–3.2 AU once every 4 years and 1 month (1,480 days). Its orbit has aneccentricity of 0.25 and aninclination of 8° with respect to theecliptic.[1] The body'sobservation arc begins nine days prior to its official discovery observation at Heidelberg.[13]
Arnolda is an assumed stonyS-type asteroid, a very common type in the inner and in parts of the central asteroid belt.[3]
In May 2005, the best-rated rotationallightcurve ofArnolda was obtained from photometric observations by Australian astronomers at the Oakley Southern Sky Observatory (E09). Lightcurve analysis gave arotation period of 14.617 hours with a brightness variation of 0.33magnitude (U=3).[11] Several other astronomers obtained number of lesser-rated lightcurves with a shorter period (U=n.a./1/2/3-).[9][10][a]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Arnolda measures between 13.68 and 16.557 kilometers in diameter and its surface has analbedo between 0.29 and 0.439.[4][5][6][7][8]
TheCollaborative Asteroid Lightcurve Link derives a high albedo of 0.3760 and a diameter of 16.44 kilometers based on anabsolute magnitude of 10.60.[3]
Thisminor planet was named after physicistArnold Berliner (1862–1942), on the occasion of his 70th birthday in 1933. Berliner was the editor of the prominent Germanperiodical scientific magazineNaturwissenschaften (AN 247).[2]
