283 Emma
From Biocrawler, the free encyclopedia.
| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | Auguste Charlois |
| Discovery date | February 8, 1889 |
| Alternate designations | B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Main belt (Eos) |
| Orbital elements C (http://asteroid.lowell.edu/) 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.
 | This asteroid-related article is a stub. You can help Biocrawler by expanding it (http://www.biocrawler.com/w/index.php?title=283_Emma&action=edit). |
... | 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.) |
