| Discovery[1] | |
|---|---|
| Discovered by | G. van Biesbroeck |
| Discovery site | Yerkes Obs. |
| Discovery date | 19 November 1924 |
| Designations | |
| (1045) Michela | |
Named after | Micheline van Biesbroeck[2] (discoverer's daughter) |
| 1924 TR · 1953 VB2 1964 XJ · 1976 AL | |
| main-belt[1][3] · (inner) Massalia[4] | |
| Orbital characteristics[3] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.64yr (23,246 d) |
| Aphelion | 2.7348AU |
| Perihelion | 1.9811 AU |
| 2.3580 AU | |
| Eccentricity | 0.1598 |
| 3.62 yr (1,323 d) | |
| 259.96° | |
| 0° 16m 19.92s / day | |
| Inclination | 0.2648° |
| 267.71° | |
| 166.97° | |
| Physical characteristics | |
| 6.104±0.265 km[5] | |
| 0.328±0.077[5] | |
| SMASS =S[3] | |
| 13.0[3] | |
1045 Michela, provisional designation1924 TR, is an stony Massalianasteroid from the inner regions of theasteroid belt, approximately 6 kilometers (4 miles) kilometers in diameter. It was discovered on 19 November 1924, by Belgian–American astronomerGeorge Van Biesbroeck at theYerkes Observatory in Williams Bay, Wisconsin, United States.[1] TheS-type asteroid was named after the discoverer's daughter, Micheline van Biesbroeck.[2]
Michela is a member of theMassalia family (404),[4] a very large inner beltasteroid family consisting ofstony asteroids.[6] It orbits the Sun in theinner main-belt at a distance of 2.0–2.7 AU once every 3 years and 7 months (1,323 days;semi-major axis of 2.36 AU). Its orbit has aneccentricity of 0.16 and aninclination of 0° with respect to theecliptic.[3]
The asteroid'sobservation arc begins with its observation as1953 VB2 at theGoethe Link Observatory in November 1953, or 29 years after to its official discovery observation.[1]
In theSMASS classification,Michela is a common, stonyS-type asteroid,[3] which is also the overallspectral type for Massalian asteroids.[6]: 23
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Michela measures 6.104 kilometers in diameter and its surface has analbedo of 0.328.[5]
As of 2018, no rotationallightcurve ofMichela has been obtained from photometric observations. The body'srotation period,poles and shape remain unknown.[3]
Thisminor planet was named after Micheline van Biesbroeck, daughter of the discovererGeorge Van Biesbroeck. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 99).[2]
