| Discovery[1] | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 25 July 1952 |
| Designations | |
| (1788) Kiess | |
Named after | Carl C. Kiess(astronomer)[2] |
| 1952 OZ · 1935 NE 1964 WP | |
| main-belt · Themis[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 64.78 yr (23,660 days) |
| Aphelion | 3.5961AU |
| Perihelion | 2.6381 AU |
| 3.1171 AU | |
| Eccentricity | 0.1537 |
| 5.50yr (2,010 days) | |
| 323.37° | |
| 0° 10m 44.76s / day | |
| Inclination | 0.6816° |
| 161.91° | |
| 143.60° | |
| Physical characteristics | |
| Dimensions | 19.59 km(calculated)[3] 20.993±0.271 km[4][5] |
| 11.0335±0.0071h[6] 12±2 h[7] | |
| 0.070±0.014[4][5] 0.08(assumed)[3] | |
| C[3] | |
| 11.801±0.002(R)[6] · 11.9[1][3][4] · 11.93±0.26[8] | |
1788 Kiess, provisional designation1952 OZ, is a carbonaceous Themistianasteroid from the outer region of theasteroid belt, approximately 20 kilometers in diameter. It was discovered on 25 July 1952, by theIndiana Asteroid Program at the U.S.Goethe Link Observatory near Brooklyn, Indiana, United States, and later named after astronomerCarl Kiess.[2][9]
TheC-type asteroid is a member of theThemis family, a dynamical family of outer-belt asteroids with nearly coplanarecliptical orbits. The asteroid orbits the Sun in theouter main-belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (2,010 days). Its orbit has aneccentricity of 0.15 and aninclination of 1° with respect to the ecliptic.[1]Kiess was first identified as1935 NE atAlgiers Observatory in 1935. Itsobservation arc begins with its official discovery observation.[9]
In 2010, two rotationallightcurves were obtained from photometric observations at thePalomar Transient Factory in California. Lightcurve analysis gave arotation period of 12 and 11.0335 hours with a brightness variation of 0.25 and 0.30magnitude, respectively (U=2-/2).[7][6]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Kiess measures 20.99 kilometers in diameter, and its surface has analbedo of 0.07.[4] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.08 and calculates a diameter of 19.59 kilometers with anabsolute magnitude of 11.9.[3]
Thisminor planet was named for American astronomerCarl C. Kiess (1887–1967), a graduate ofIndiana University, who made distinguished contributions both in astronomy andspectroscopy at theU.S. National Bureau of Standards where he worked for over 40 years.[2] The officialnaming citation was published by theMinor Planet Center on 15 June 1973 (M.P.C. 3508).[10] Kiess was also a member of severaleclipse expeditions. The lunar craterKiess was named in his honour.[2]
