| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 29 December 1937 |
| Designations | |
| (1443) Ruppina | |
Named after | Ruppin(German city)[2] |
| 1937 YG · 1931 TX3 | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.20 yr (31,121 days) |
| Aphelion | 3.1266AU |
| Perihelion | 2.7496 AU |
| 2.9381 AU | |
| Eccentricity | 0.0642 |
| 5.04yr (1,840 days) | |
| 61.181° | |
| 0° 11m 44.52s / day | |
| Inclination | 1.9299° |
| 174.89° | |
| 163.11° | |
| Physical characteristics | |
| Dimensions | 16.467±0.127 km[4] 16.67±0.75 km[5] 16.713±0.173 km[6] 18±3 km[7] 32.18 km(derived)[3] |
| 5.880±0.001 h[8] 5.890±0.040 h[9] 5.9046±0.0347 h[10] | |
| 0.057(assumed)[3] 0.176±0.017[5] 0.20±0.07[7] 0.2128±0.0392[6] 0.218±0.035[4] | |
| C[3] | |
| 10.924±0.001(R)[10] · 10.970±0.120(R)[9] · 11.0[1] · 11.19±0.03[7] · 11.19[3][6] · 11.40[5] | |
1443 Ruppina, provisional designation1937 YG, is anasteroid from the outer region of theasteroid belt, approximately 17 kilometers in diameter. It was discovered on 29 December 1937, by German astronomerKarl Reinmuth atHeidelberg Observatory in southwest Germany.[11] It is named for the German cityRuppin.[2]
Ruppina asteroid orbits the Sun in theouter main-belt at a distance of 2.7–3.1 AU once every 5.04 years (1,840 days). Its orbit has aneccentricity of 0.06 and aninclination of 2° with respect to theecliptic.[1] In 1931,Ruppina was first identified as1931 TX3 atLowell Observatory, extending the body'sobservation arc by 6 years prior to its official discovery at Heidelberg.[11]
In November 2007, the first rotationallightcurve ofRuppina was obtained atWhitin Observatory in Massachusetts, United States. Lightcurve analysis gave a well-definedrotation period of 5.880 hours with a brightness variation of 0.35magnitude (U=3).[7] During the 2014-apparition ofRuppina, an identical period was obtained again at Whitin Observatory (U=3),[8] while photometric observations in the R-band at thePalomar Transient Factory in California, gave a period of 5.890 and 5.9046 hours with an amplitude of 0.27 and 0.28, respectively (U=2/2).[9][10]
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Ruppina measures approximately 16.5 kilometers in diameter and its surface has analbedo of 0.176 and 0.21, respectively.[4][5][6] Observations at the Whitin Observatory gave an albedo of 0.20 and a diameter of 18 kilometers,[7] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceousC-type asteroids of 0.057, and consequently derives a much larger diameter of 32.18 kilometers with anabsolute magnitude of 11.19.[3]
Thisminor planet is named for the German city ofRuppin, birthplace of astronomer Martin Ebell, who proposed the name and after whom the minor planet1205 Ebella is named.[2] The official naming citation was published inThe Names of the Minor Planets byPaul Herget in 1955 (H 130).[2]
