(1025) Riema
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Asteroid (1025) Riema |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 1.9791 AU |
| eccentricity | 0.0392 |
| Perihelion - aphelion | 1.9015 AU - 2.0568 AU |
| Inclination of the orbit plane | 26.862 ° |
| Sidereal period | 2,784 a |
| Mean orbital velocity | 21.17 km / s |
| Physical Properties | |
| Medium diameter | 5.5 km |
| Dimensions | ? kg |
| Albedo | 0.40 |
| Medium density | ? g / cm³ |
| Rotation period | 3.580 h |
| Absolute brightness | 12,347 mag |
| Spectral class | Xe |
| history | |
| Explorer | K. Reinmuth |
| Date of discovery | 1923 |
| Another name | 1923 NX, A923 QA |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(1025) Riema is an asteroid of the main belt that was discovered on August 12, 1923 by the German astronomer Karl Wilhelm Reinmuth , who worked at the observatory on the Königstuhl near Heidelberg .
The asteroid is named after the German astronomer Johannes Karl Richard Riem .
The orbit has a semi-major axis of 1.9791 astronomical units and an orbital eccentricity of 0.0392. Thus it moves at a distance of 1.9015 ( perihelion ) to 2.0568 ( aphelion ) astronomical units in 2.784 a around the sun . The orbit is inclined 26.862 ° to the ecliptic .
The asteroid has a diameter of 5.5 km and an albedo of 0.40. It rotates around its own axis in 3.580 hours.