Asteroid (283) Emma
Orbital characteristics
| Epoch 1-Jul-2021 (2459396.5 JD) | |
| Apoapsis | 3.4899 AU |
| 5.2208×108 km | |
| Periapsis | 2.6095 AU |
| 3.9038×108 km | |
| Semi-major axis | 3.0497 AU |
| 4.5623×108 km | |
| Eccentricity | 0.1443398 |
| Inclination | 7.9892 ° |
| Longitude of asc. node | 303.90 ° |
| Argument of periapsis | 55.407 ° |
| Orbital period | 1945.28 days |
| 5.326 years | |
| Avg. orbital speed | 16.97 km/s |
Physical characteristics
| Mean diameter | 132.38 km |
| Mass | 1.38×1018 kg |
| Avg. density | 1.136 g/cm3 |
| Equatorial surface gravity | 0.021 m/s2 |
| 0.002 g | |
| Escape velocity | 0.053 km/s |
| Rotation period (sidereal) | 6.8952 hours |
| Albedo | 0.023 |
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Links
Shape model data sources
- Michalowski et al., Photometry and models of selected main-belt asteroids (III): 283 Emma, 665 Sabine, and 690 Wratislavia. Astron. Astrophys. 459, 2006 link
- Viikinkoski et al., Adaptive optics and lightcurve data of asteroids: twenty shape models and information content analysis. Astronomy & Astrophysics 607, A117, 2017 link
Downloads
Models
Models are given in Stanford Triangle Format (PLY) and Alias Waveform Format (OBJ) - you can use MeshLab or any other tool to convert them to other formats.
- Emma (Model 1) (PLY 39 KB) (OBJ 61 KB)
- Emma (Model 2) (PLY 38 KB) (OBJ 61 KB)
- Emma (Viikinkoski) (PLY 16 KB) (OBJ 35 KB)
Please note that the models are in planetocentric coordinate system, with Z axis passing through north pole. Actual rotational axis may differ from planetocentric poles, especially for small irregular bodies.
Surface Textures
This object does not have textures yet and is being displayed as a solid gray shape.