Asteroid (7) Iris
Orbital characteristics
| Epoch 1-Jul-2021 (2459396.5 JD) | |
| Apoapsis | 2.9336 AU |
| 4.3886×108 km | |
| Periapsis | 1.8388 AU |
| 2.7508×108 km | |
| Semi-major axis | 2.3862 AU |
| 3.5697×108 km | |
| Eccentricity | 0.2294021 |
| Inclination | 5.5181 ° |
| Longitude of asc. node | 259.53 ° |
| Argument of periapsis | 145.31 ° |
| Orbital period | 1346.35 days |
| 3.686 years | |
| Avg. orbital speed | 19.03 km/s |
Physical characteristics
| Mean diameter | 199.83 km |
| Rotation period (sidereal) | 7.1388 hours |
| Albedo | 0.277 |
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Links
Shape model data sources
- Hanuš et al., The shape of (7) Iris as evidence of an ancient large impact? Astronomy & Astrophysics 624, A121 (2019) link
- Viikinkoski et al., Adaptive optics and lightcurve data of asteroids: twenty shape models and information content analysis. Astronomy & Astrophysics 607, A117, 2017 link
- Kaasalainen et al., Models of twenty asteroids from photometric data. Icarus 159, 2002 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.
- Iris (Hanuš 2019) (PLY 193 KB) (OBJ 306 KB)
- Iris (Viikinkoski) (PLY 16 KB) (OBJ 35 KB)
- Iris (Kaasalainen, Model 1) (PLY 39 KB) (OBJ 65 KB)
- Iris (Kaasalainen, Model 1) (PLY 39 KB) (OBJ 65 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.