283 Emma
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| Discovery | |
|---|---|
| Discovered by: | Auguste Charlois |
| Discovery date: | February 8, 1889 |
| Orbital characteristics | |
| Epoch 30 January, 2005 (JD 2453400.5) | |
| Aphelion | 524.763 Gm (3.508 AU) |
| Perihelion: | 385.674 Gm (2.578 AU) |
| Semi-major axis: | 455.219 Gm (3.043 AU) |
| Eccentricity: | 0.153 |
| Orbital period: | 1938.796 d (5.31 a) |
| Mean anomaly: | 67.855° |
| Inclination: | 7.991° |
| Longitude of ascending node: | 304.506° |
| Argument of perihelion: | 54.031° |
| Physical characteristics | |
| Dimensions: | 148.0 km |
| Mass: | unknown |
| Mean density: | unknown |
| Escape velocity: | unknown |
| Rotation period: | unknown |
| Albedo: | 0.0262 (Dark) |
283 Emma is a big main belt asteroid.
It was found by Auguste Charlois on February 8, 1889 in Nice.
A companion for Emma was noticed on 14 July, 2003 by W. J. Merline et al. using the Keck II telescope. It is 12 km in diameter and is designated S/2003 (283) 1. The announcement is contained in the International Astronomical Union Circular (IAUC) 8165. [1] It probably orbits at a distance of 370 km from Emma. When the orbit is known well enough, the moon will get a permanent number and name.
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282 Clorinde | 283 Emma | 284 Amalia
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| Near-Earth asteroids · Main belt · Jupiter Trojans · Neptune Trojans · Comets · Kuiper belt · Oort cloud |
