283 Emma
| Discovery A | |
|---|---|
| Discoverer | Auguste Charlois |
| Discovery Date | February 8, 1889 |
| Alternate Designations | B |
| Category | Main belt (Eos) |
| Orbital Elements C Epoch 30 January, 2005 (JD 2453400.5) | |
| Eccentricity (e) | 0.153 |
| Semi-Major Axis (a) | 455.219 Gm (3.043 AU) |
| Perihelion (q) | 385.674 Gm (2.578 AU) |
| Aphelion (Q) | 524.763 Gm (3.508 AU) |
| Orbital Period (P) | 1938.796 d (5.31 a) |
| Mean Orbital Speed | 17.07 km/s |
| Inclination (i) | 7.991° |
| Longitude of the Ascending Node (Ω) | 304.506° |
| Argument of Perihelion (ω) | 54.031° |
| Mean Anomaly (M) | 67.855° |
| Physical Characteristics | |
| Dimensions | 148.0 km |
| Mass | unknown |
| Density | unknown |
| Surface Gravity | unknown |
| Escape Velocity | unknown |
| Rotation Period | unknown |
| Spectral Class | unknown |
| Absolute Magnitude | 8.72 |
| Albedo | unknown |
| Mean Surface Temperature | unknown |
283 Emma is a very large Main belt asteroid.
It was discovered by Auguste Charlois on February 8, 1889 in Nice.
A companion for Emma was detected on 14 July, 2003 by J. W. Merline et al. using the Keck II telescope. It is 12 km in diameter and was designated as S/2003 (283) 1. It probably orbits at a distance of 370 km from the primary. When the orbit is known well enough, the satellite will receive a permanent number and name.
... | Previous asteroid | 283 Emma | Next asteroid | ...
| The Minor Planets |
| Vulcanoids | Main belt | Groups and Families | Near-Earth objects | Jupiter Trojans |
| Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper belt | Oort cloud |
| (For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system) |
| (For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.) |
Categories: Asteroid stubs | Binary asteroids | Eos asteroids