| Discovery[1] | |
|---|---|
| Discovered by | A. Kopff |
| Discovery site | Heidelberg Obs. |
| Discovery date | 12 September 1906 |
| Designations | |
| (1780) Kippes | |
Named after | Otto Kippes[2] (priest and astronomer)[2] |
| A906 RA · 1935 CC 1938 UC1 · 1943 TL 1943 VD · 1947 NB 1951 ED2 · 1953 SA 1957 LD · 1962 JU 1969 RB2 · 1975 VL6 A911 QE | |
| main-belt · (outer) Eos[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.38 yr (40,315 days) |
| Aphelion | 3.1792AU |
| Perihelion | 2.8538 AU |
| 3.0165 AU | |
| Eccentricity | 0.0539 |
| 5.24yr (1,914 days) | |
| 147.84° | |
| 0° 11m 17.16s / day | |
| Inclination | 9.0022° |
| 290.98° | |
| 340.31° | |
| Physical characteristics | |
| Dimensions | 25.77±0.80 km[5] 27.92±1.8 km[6] 28.164±0.241 km[7] 29.16±0.38 km[8] 31.262±0.341 km[9] |
| 18.0h[10] | |
| 0.0966±0.0173[9] 0.111±0.014[8] 0.1212±0.017[6] 0.126±0.013[7] 0.143±0.010[5] | |
| S [3] | |
| 10.68[1][3][5][6][8][9][10] · 10.72±0.26[11] | |
1780 Kippes, provisional designationA906 RA, is an Eoanasteroid from the outer regions of theasteroid belt, approximately 28 kilometers in diameter. It was discovered on 12 September 1906, by astronomerAugust Kopff at theHeidelberg-Königstuhl State Observatory in southwest Germany.[12] The asteroid was named after German Catholic priest and amateur astronomerOtto Kippes.[2]
Kippes is a member theEos family (606), the largestasteroid family of theouter main belt consisting of nearly 10,000 asteroids.[3][4][13]: 23 It orbits the Sun in theouter main-belt at a distance of 2.9–3.2 AU once every 5 years and 3 months (1,914 days). Its orbit has aneccentricity of 0.05 and aninclination of 9° with respect to theecliptic.[1]
The body'sobservation arc begins at Heidelberg in 1906, one week after its official discovery observation.[12]
Kippes is an assumedS-type asteroid,[3] while the overallspectral type of the Eos family is that of aK-type.[13]: 23
In July 1984, a rotationallightcurve ofKippes was obtained from photometric observations by astronomerRichard P. Binzel at theCTIO andMcDonald Observatory. Lightcurve analysis gave arotation period of 18.0 hours with a brightness amplitude of 0.23magnitude (U=2).[10]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Kippes measures between 25.77 and 31.262 kilometers in diameter and its surface has analbedo between 0.0966 and 0.143.[5][6][7][8][9]
TheCollaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1212 and a diameter of 27.92 kilometers based on anabsolute magnitude of 10.68.[3][6]
Thisminor planet was named after German Catholic priest and amateur astronomerOtto Kippes (1905–1994). He was a precise observer, acknowledged for his orbit calculations and identifications of hundreds of minor planets in widely separated oppositions.[2][14] The officialnaming citation was published by theMinor Planet Center on 15 June 1973 (M.P.C. 3508).[15]
