Asteroid (243) Ida
Orbital characteristics
| Epoch 1-Jul-2021 (2459396.5 JD) | |
| Apoapsis | 2.9870 AU |
| 4.4685×108 km | |
| Periapsis | 2.7371 AU |
| 4.0946×108 km | |
| Semi-major axis | 2.8620 AU |
| 4.2816×108 km | |
| Eccentricity | 0.0436694 |
| Inclination | 1.1302 ° |
| Longitude of asc. node | 323.63 ° |
| Argument of periapsis | 113.94 ° |
| Orbital period | 1768.53 days |
| 4.842 years | |
| Avg. orbital speed | 17.60 km/s |
Physical characteristics
| Mean diameter | 32.000 km |
| Extent | 59.8x25.4x18.6 km |
| Mass | 4.121×1016 kg |
| Avg. density | 2.402 g/cm3 |
| Equatorial surface gravity | 0.011 m/s2 |
| 0.001 g | |
| Escape velocity | 0.019 km/s |
| Rotation period (sidereal) | 4.6336 hours |
| Albedo | 0.262 |
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Links
Shape model data sources
- Stooke, P., Small Body Shape Models. EAR-A-5-DDR-STOOKE-SHAPE-MODELS-V1.0. NASA Planetary Data System, 2002 link
- Small Body Optical Shape Models link
- Hanuš et al., An anisotropic distribution of spin vectors in asteroid families. Astronomy and Astrophysics 559, A134, 2013 link
Texture sources
- Stooke. P., Stooke Small Bodies Maps V2.0. MULTI-SA-MULTI-6-STOOKEMAPS-V2.0. NASA Planetary Data System, 2012. 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.
- Ida (Stooke) (PLY 94 KB) (OBJ 161 KB)
- Ida (Thomas) (PLY 595 KB) (OBJ 1.1 MB)
- Ida (Lightcurve 1) (PLY 38 KB) (OBJ 61 KB)
- Ida (Lightcurve 2) (PLY 38 KB) (OBJ 61 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
Textures are simple cylindrical projections with prime meridian at the middle, provided at the highest resolution available.
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Ida (Mosaic)
(JPEG, 2048×1024px, 129 KB)
