| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 22 February 1928 |
| Designations | |
| (1156) Kira | |
Named after | unknown[2] |
| 1928 DA · 1935 FY 1938 DA · 1953 RC1 1955 FW1 · 1973 QC2 | |
| main-belt · (inner)[3] background[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.76 yr (32,418 days) |
| Aphelion | 2.3414AU |
| Perihelion | 2.1329 AU |
| 2.2372 AU | |
| Eccentricity | 0.0466 |
| 3.35yr (1,222 days) | |
| 326.67° | |
| 0° 17m 40.2s / day | |
| Inclination | 1.3976° |
| 91.131° | |
| 353.76° | |
| Physical characteristics | |
| Dimensions | 6.83±0.21 km[5] 6.831±0.211 km[5] 8.79±1.97 km[6] 8.856±0.105 km[7] 9.00±2.24 km[8] 10.30 km(calculated)[3] 10.83±0.76 km[9] |
| 2.7910±0.0005h[a] 2.79103±0.00004 h[10] 2.79105±0.00003 h[10] 2.79113±0.00004 h[10] | |
| 0.165±0.024[9] 0.181±0.052[11] 0.20(assumed)[3] 0.2490±0.0585[7] 0.26±0.14[6] 0.29±0.12[8] 0.455±0.066[5] | |
| S[3] | |
| 12.30[1][3][5][8] · 12.40[7][9] · 12.48±0.35[12] · 12.72[6] | |
1156 Kira, provisional designation1928 DA, is a stony backgroundasteroid from the inner regions of theasteroid belt, approximately 9 kilometers in diameter. It was discovered on 22 February 1928, by German astronomerKarl Reinmuth atHeidelberg Observatory in southwest Germany.[13] Any reference of its name to a person or occurrence is unknown.[2]
Kira is not a member of any knownasteroid family and belongs to the main belt'sbackground population.[4] At the present epoch, however, it orbits within the region of theFlora family.[10]
This asteroid orbits the Sun in theinner main-belt at a distance of 2.1–2.3 AU once every 3 years and 4 months (1,222 days). 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 Heidelberg.[13]
Kira is an assumed stonyS-type asteroid.[3]
Several rotationallightcurves ofKira have been obtained from photometric observations since 2007. Lightcurve analysis gave arotation period between 2.7910 and 2.79113 hours with a brightness variation of 0.20 to 0.26magnitude (U=3/3/3/2+).[10][a]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Kira measures between 6.83 and 10.83 kilometers in diameter and its surface has analbedo between 0.165 and 0.455.[5][6][7][8][9][11]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 10.30 kilometers based on anabsolute magnitude of 12.3.[3]
Thisminor planet was named by astronomerMax Mündler, staff member at Heidelberg Observatory. Any reference of its name to a person or occurrence is unknown.[2]
Among the many thousands ofnamed minor planets,Kira is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between164 Eva and1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomersAuguste Charlois,Johann Palisa,Max Wolf andKarl Reinmuth.[14]
