| Discovery[1] | |
|---|---|
| Discovered by | G. van Biesbroeck |
| Discovery site | Yerkes Obs. |
| Discovery date | 14 January 1927 |
| Designations | |
| (1079) Mimosa | |
| Pronunciation | /mɪˈmoʊzə,-sə/[2] |
Named after | Mimosa(flowering plant)[3] |
| 1927 AD · 1961 AM | |
| main-belt · (outer) Koronis[4] · Karin[5] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 90.80 yr (33,165 days) |
| Aphelion | 3.0127AU |
| Perihelion | 2.7332 AU |
| 2.8729 AU | |
| Eccentricity | 0.0486 |
| 4.87yr (1,779 days) | |
| 253.25° | |
| 0° 12m 8.64s / day | |
| Inclination | 1.1764° |
| 329.37° | |
| 106.35° | |
| Physical characteristics | |
| Dimensions | 19.01±1.20 km[6] 20.67 km(derived)[4] 20.69±2.7 km[1][5] |
| 7.3h[7] 24 h[8] 64.6±0.5 h[9] | |
| 0.1332(derived)[4] 0.1367±0.044[1] 0.174±0.025[6] | |
| Tholen =S[1][4] · S[10] B–V = 0.800[1] U–B = 0.393[1] | |
| 11.1[1] · 11.18±0.02[9] · 11.20[6] · 11.23[4][7] · 11.30±0.26[10] | |
1079 Mimosa, provisional designation1927 AD, is a stony Karin or Koronianasteroid from the outer regions of theasteroid belt, approximately 20 kilometers in diameter. It was discovered on 14 January 1927, by Belgian–American astronomerGeorge Van Biesbroeck at theYerkes Observatory in Williams Bay, Wisconsin.[11] The asteroid was named after the flowering plantMimosa.[3]
Based on theHierarchical Clustering Method, which uses the object'sproper orbital elements,Mimosa is a member of the stonyKarin family (610),[5] a mid-sized asteroid family named after its parent body832 Karin.[12]: 23 The asteroid has also been grouped into the much largerKoronis family (605).[4][5]
Mimosa orbits the Sun in theouter asteroid belt at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,779 days;semi-major axis of 2.87 AU). Its orbit has aneccentricity of 0.05 and aninclination of 1° with respect to theecliptic.[1] The body'sobservation arc begins with its official discovery observation at Williams Bay in January 1927.[11]
In theTholen classification,Mimosa is a stonyS-type asteroid, which matches the overallspectral type of both the Karin and Koronis family.[1][4]Pan-STARRS' photometric survey also characterized the asteroid as a common S-type.[10]
Several fragmentary rotationallightcurves ofMimosa have been obtained from photometric observations since 1983.[7][8][9] Lightcurve analysis gave a consolidatedrotation period of 64.6 hours with a brightness amplitude between 0.07 and 0.13magnitude (U=2-).[4] While not being aslow rotator, this is a notably longer-than average period as most asteroids take less than 20 hours to complete a full rotation. However, the period is based on a fragmentary lightcurve and still may change significantly. As of 2017, no secure period has been obtained.[4]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS (PDS IMPS) and the JapaneseAkari satellite,Mimosa measures between 19.01 and 20.69 kilometers in diameter and its surface has analbedo between 0.1367 and 0.174.[1][5][6] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1332 and a diameter of 20.67 kilometers based on anabsolute magnitude of 11.23.[4]
Thisminor planet was named after the flowering plantMimosa, a genus of herbs and shrubs of the legume familyFabaceae(also see list of minor planets named after animals and plants). The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 102).[3]
