_Planckia.png) Shape model ofPlanckia from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | M. F. Wolf |
| Discovery site | Heidelberg Obs. |
| Discovery date | 28 January 1927 |
| Designations | |
| (1069) Planckia | |
Named after | Max Planck[2] (German physicist) |
| 1927 BC · 1952 QY 1975 VG8 | |
| main-belt · (outer)[3] background[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 90.75 yr (33,147d) |
| Aphelion | 3.4721AU |
| Perihelion | 2.7809 AU |
| 3.1265 AU | |
| Eccentricity | 0.1105 |
| 5.53yr (2,019 days) | |
| 76.394° | |
| 0° 10m 41.88s / day | |
| Inclination | 13.563° |
| 142.38° | |
| 31.794° | |
| Physical characteristics | |
| Dimensions | 35.657±0.680 km[5] 39.17±1.40 km[6] 39.35 km(derived)[3] 39.50±2.1 km[7] 43.675±0.859 km[8] 44.34±1.28 km[9] |
| 8.643±0.05h[10] 8.655±0.001 h[11] 8.66±0.05 h[11] 8.665±0.005 h[12][a] 10.58±0.05 h[13] | |
| 0.1771±0.0206[8] 0.179±0.011[9] 0.1982(derived)[3] 0.2158±0.025[7] 0.219±0.037[6] | |
| SMASS =S[1][3] | |
| 9.30[6][7][8][9] · 9.4[1][3] | |
1069 Planckia, provisional designation1927 BC, is abackground asteroid from the outer regions of theasteroid belt, approximately 39 kilometers (24 miles) in diameter. It was discovered on 28 January 1927, by astronomerMax Wolf at theHeidelberg-Königstuhl State Observatory in Germany.[14] The asteroid was named after German physicistMax Planck.[2]
Planckia is a non-family asteroid from the main belt'sbackground population.[4] It orbits the Sun in theouter main-belt at a distance of 2.8–3.5 AU once every 5 years and 6 months (2,019 days;semi-major axis of 3.13 AU). Its orbit has aneccentricity of 0.11 and aninclination of 14° with respect to theecliptic.[1] The body'sobservation arc begins at Heidelberg in February 1927, or 10 days after its official discovery observation.[14]
Thisminor planet was named after noted German physicistMax Planck (1858–1947), on the commemoration of his 80th birthday. He was a professor of physics at Berlin University and the founder ofquantum mechanics. In 1918, he received theNobel prize in Physics. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 101). He is also honored by a lunar craterPlanck.[2]
In theSMASS classification,Planckia is a common, stonyS-type asteroid.[1][3]
Between 2000 and 2010, several rotationallightcurves ofPlanckia were obtained from photometric observations byBrian Warner, Jérôme Caron andRené Roy (U=2/3/3/2/2-).[10][11][12][13] Lightcurve analysis gave a consolidatedrotation period of 8.665 hours with a brightness amplitude between 0.14 and 0.42magnitude.[3][a]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Planckia measures between 35.657 and 44.34 kilometers in diameter and its surface has analbedo between 0.1771 and 0.219.[5][6][7][8][9]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1982 and a diameter of 39.35 kilometers based on anabsolute magnitude of 9.4.[3]
