| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 31 January 1924 |
| Designations | |
| (1016) Anitra | |
| Pronunciation | /əˈniːtrə/ |
Named after | fictional character in dramaPeer Gynt[2] |
| 1924 QG · 1929 TE1 | |
| main-belt · (inner)[3] Flora[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 93.42 yr (34,123 days) |
| Aphelion | 2.5035AU |
| Perihelion | 1.9356 AU |
| 2.2196 AU | |
| Eccentricity | 0.1279 |
| 3.31yr (1,208 days) | |
| 176.01° | |
| 0° 17m 53.16s / day | |
| Inclination | 6.0352° |
| 8.8588° | |
| 53.320° | |
| Knownsatellites | 1[5][6] |
| Physical characteristics | |
| Dimensions | 9.539±0.078 km[7] 10.302±0.068 km[8] 12.97 km(calculated)[3] |
| 5.928±0.001h[9] 5.9288±0.0005 h[10] 5.929±0.001 h[11] 5.9295±0.0005 h[12] 5.92951 h[3] 5.9294±0.0001 h[6] 5.9300±0.0001 h[6] 5.930 h[13] 5.93 h[a] 5.9301±0.0003 h[14] | |
| 0.20(assumed)[3] 0.2728±0.0572[8] 0.308±0.048[7] | |
| SMASS =S[1] · S[3] | |
| 11.8[3] · 11.9[1] · 12.0[8] | |
1016 Anitra, provisional designation1924 QG, is a stony Florianasteroid and suspected asynchronousbinary system from the inner regions of theasteroid belt, approximately 10 kilometers in diameter.
It was discovered on 31 January 1924, by German astronomerKarl Reinmuth at theHeidelberg-Königstuhl State Observatory in southwest Germany.[15] The asteroid was likely named after the fictional character Anitra fromHenrik Ibsen's dramaPeer Gynt.[2]
Anitra is a member of theFlora family (402), a giantasteroid family and the largest family of stony asteroids in the main-belt.[4][16]: 23
It orbits the Sun in theinner main-belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,208 days). Its orbit has aneccentricity of 0.13 and aninclination of 6° with respect to theecliptic.[1] The asteroid'sobservation arc begins at Heidelberg, 12 days after to its official discovery observation.[15]
In theSMASS classification,Anitra is a common, stonyS-type asteroid.[1]
In November 2015, a rotationallightcurve ofAnitra was obtained from photometric observations by an international collaborations of astronomers who combined their observational results. Lightcurve analysis gave arotation period of 5.92951 hours with a brightness amplitude of 0.30magnitude (U=3).[6]
Anitra is a suspected asynchronousbinary asteroid, a system with a fairly large separation, for which tidal forces have been insufficient to synchronize the periods within the system's lifetime.[5][6] The likelyminor-planet moon has a rotation period of 2.609 hours and is thought to orbit its primary every 240 hours. The results, however, are still tentative.[3] More than 100known binaries from the asteroid belt have already been discovered.
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Anitra measures 9.539 and 10.302 kilometers in diameter and its surface has analbedo of 0.2728 and 0.308, respectively.[7][8]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for stony S-type asteroids of 0.20 and calculates a diameter of 12.97 kilometers based on anabsolute magnitude of 11.8.[3]
Thisminor planet was probably named after the Arabian dancer Anitra, daughter of a Bedouin chief inHenrik Ibsen's dramaPeer Gynt, a five-act play in verse. The music was composed byEdvard Grieg who named one piece "Anitra's Dance".[2] The minor planets(4872) and(5696) are named after Grieg and Ibsen, respectively.[2]
The official naming citation is based on research byLutz Schmadel and feedback from astronomers R. Bremer andI. van Houten-Groeneveld.[2]
{{cite journal}}: CS1 maint: numeric names: authors list (link)