| Discovery[1] | |
|---|---|
| Discovered by | A. Mrkos |
| Discovery site | Kleť Obs. |
| Discovery date | 21 April 1985 |
| Designations | |
| (5318) Dientzenhofer | |
Named after | Christoph Dientzenhofer Kilian Ignaz Dientzenhofer (German Baroque architects) |
| 1985 HG1 · 1983 UL1 1985 JZ · 1988 CX2 | |
| main-belt[1][2] · (inner) background[3] · Flora[4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 46.48yr (16,975 d) |
| Aphelion | 2.5941AU |
| Perihelion | 1.9861 AU |
| 2.2901 AU | |
| Eccentricity | 0.1327 |
| 3.47 yr (1,266 d) | |
| 222.61° | |
| 0° 17m 3.84s / day | |
| Inclination | 3.3096° |
| 107.64° | |
| 54.418° | |
| Physical characteristics | |
| 5.41 km(calculated)[4] 6.267±0.116 km[5][6] | |
| 8.062±0.001 h[7] 8.062±0.002 h[8] | |
| 0.215±0.063[5][6] 0.24(assumed)[4] | |
| SMASS =Sk[2][3] | |
| 13.29±0.23[9] 13.3[6] 13.5[2][4] | |
5318 Dientzenhofer, provisional designation1985 HG1, is a stony backgroundasteroid from the inner regions of theasteroid belt, approximately 6 kilometers (3.7 miles) in diameter. It was discovered on 21 April 1985, by Czech astronomerAntonín Mrkos at theKleť Observatory in Bohemia, Czech Republic.[1] The transitionalS-type asteroid has arotation period of 8.06 hours.[4] It was named after the German Baroque architectsChristoph andKilian Ignaz Dientzenhofer.[1]
Dientzenhofer is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[3] Based on osculating Keplerianorbital elements, the asteroid has also been classified as a member of theFlora family (402), a giantasteroid family and the largest family of stony asteroids in the main-belt.[4]
The asteroid orbits the Sun in theinner main-belt at a distance of 2.0–2.6 AU once every 3 years and 6 months (1,266 days;semi-major axis of 2.29 AU). Its orbit has aneccentricity of 0.13 and aninclination of 3° with respect to theecliptic.[2] The body'sobservation arc begins with aprecovery taken atPalomar Observatory in May 1971, or 14 years prior to its official discovery observation at Klet.[1]
In the Bus–BinzelSMASS classification,Dientzenhofer is an Sk-subtype, that transitions from the stonyS-type to the uncommonK-type asteroids.[2][3]
In 2016, two rotationallightcurves ofDientzenhofer were obtained fromphotometric observations by Italian astronomers at the Eurac Observatory (C62), Astronomical Observatory University of Siena (K54) and Carpione Observatory (K49). Lightcurve analysis gave an identicalrotation period of 8.062 hours with a brightness amplitude of 0.70 and 0.84magnitude, respectively (U=3-/3), indicative of a non-spheroidal shape.[4][7][8]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Dientzenhofer measures 6.267 kilometers in diameter and its surface has analbedo of 0.215,[5][6] while theCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from8 Flora, the parent body of the Flora family – and calculates a diameter of 5.41 kilometers based on anabsolute magnitude of 13.5.[4]
Thisminor planet was named afterChristoph Dientzenhofer (1655–1722) and his sonKilian Ignaz Dientzenhofer (1689–1751), members of theDientzenhofer family of architects. Christoph and Kilian Ignaz are known for the churches and monasteries built in Prague during the 17th and 18th century in theBohemian Baroque architecture style.[1] The official naming citation was published by theMinor Planet Center on 9 January 2001 (M.P.C. 41934).[10]
