(1025) Riema
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.