| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 31 August 1935 |
| Designations | |
| (1372) Haremari | |
Named after | all female staff members ofARI[2] |
| 1935 QK · 1928 DX 1937 BD · 1944 QK 1951 EW1 · 1953 OM 1953 PZ | |
| main-belt · (middle) Watsonia[3] · Ceres trojan[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 89.18 yr (32,574 days) |
| Aphelion | 3.1761AU |
| Perihelion | 2.3557 AU |
| 2.7659 AU | |
| Eccentricity | 0.1483 |
| 4.60yr (1,680 days) | |
| 243.89° | |
| 0° 12m 51.48s / day | |
| Inclination | 16.450° |
| 327.45° | |
| 88.484° | |
| Physical characteristics | |
| Dimensions | 21.96±0.72 km[5] 23.90±0.53 km[6] 24.18 km(derived)[7] 26.491±0.292 km[8] 27.724±0.158 km[9] 31.17±8.52 km[10] |
| 15.25±0.03h[11] | |
| 0.0303±0.0021[9] 0.039±0.012[8] 0.09±0.03[10] 0.1097(derived)[7] 0.126±0.006[6] 0.146±0.027[5] | |
| SMASS =L[1][7] | |
| 11.00[5][6][10] · 11.1[1][7] · 12.2[9] | |
1372 Haremari, provisional designation1935 QK, is a rare-type Watsonianasteroid and a suspectedtrojan ofCeres from the central regions of theasteroid belt, approximately 26 kilometers in diameter. It was discovered on 31 August 1935, by astronomerKarl Reinmuth at theHeidelberg-Königstuhl State Observatory in southwest Germany.[12] The asteroid was named for all female staff members of theAstronomical Calculation Institute.[2]
Haremari is a member of the very smallWatsonia family (537), named after its parent body, namesake and largest member,729 Watsonia.[3][13]: 23
It orbits the Sun in thecentral main-belt at a distance of 2.4–3.2 AU once every 4 years and 7 months (1,680 days). Its orbit has aneccentricity of 0.15 and aninclination of 16° with respect to theecliptic.[1] The body'sobservation arc begins with its first observation at Heidelberg in February 1928, more than seven years prior to its official discovery observation.[12]
Long-term numerical integrations suggest that Haremari is atrojan ofCeres, staying a 1:1orbital resonance with the onlydwarf planet of the asteroid belt. It is thought that Haremari is currently transiting from atadpole to ahorseshoe orbit. Other suspected co-orbitals are the asteroids855 Newcombia,4608 Wodehouse, and8877 Rentaro.[4][14]
In theSMASS classification, Haremari is a rareL-type asteroid with a moderatealbedo.[1][7] This type corresponds with the overallspectral type of theWatsonia family.[13]: 23
In November 2009, a rotationallightcurve of Haremari was obtained from photometric observations by Richard Durkee at the Shed of Science Observatory (H39). Lightcurve analysis gave arotation period of 15.25 hours with a brightness amplitude of 0.12magnitude (U=2).[11]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer, Haremari measures between 21.96 and 31.17 kilometers in diameter and its surface has analbedo between 0.0303 and 0.146.[5][6][8][9][10]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1097 and a diameter of 24.18 kilometers based on anabsolute magnitude of 11.1.[7]
Thisminor planet jointly honors all the female staff members of theAstronomical Calculation Institute (Heidelberg University) (German:Astronomisches Rechen-Institut), commonly known as ARI. In often published versions, "Haremari" is a composed name and means "the harem of A.R.I.".[2]
According toIngrid van Houten-Groeneveld, who worked as a young astronomer at Heidelberg, Reinmuth had often been asked by his colleges at ARI to name some of his discoveries after their female friends, as well as after popular actresses (and not just the female staff at ARI). He then compiled all these proposals to the name "Haremari". However, as Groeneveld recorded, "Reinmuth did not want to publish the original meaning and he, therefore, devised the interpretation of the first sentence in 1948".[2]
