Table 1
Summary of Rosetta and Stardust classification.
| MIDAS | COSIMA | GIADA | OSIRIS | VIRTIS | Stardust | |
|---|---|---|---|---|---|---|
| Porous group | 1–50 μm | 14–300 μm | 0.1–0.8 mm | ~100 μm-1 m, | Dominating size | Particle creating |
| - Porosity 10–95% | on target; | dominant | distribution | track A with | ||
| - Aggregate | up to | scatterers | (diff. slope | multiple terminals | ||
| - Low strength | mm range | –2.5 to –3) | or track B | |||
| parents | 1–100 μm | |||||
| Fluffy group | fractal: 15–30 μm | No indication | 0.1–10 mm | Not dominant | Not excluded, | Particle creating bulbous |
| - Porosity >95% | Df = 1.7 ± 0.1 | Df < 1.9, | scatterers | consistent with | tracks (B for coupled, | |
| - Likely fractal | constituent | ~23% of GDS | moderate super- | A* or C for fluffy GIADA | ||
| - Very low strength | particles: | detections | heating in normal | detections), aluminum foil | ||
| <1.5 μm | activity | clusters. Up to 100 μm | ||||
| Solid group | 50–500 nm | CAI candidate | 0.15–0.5 mm | No indication | Outburst: | Particle creating |
| - Porosity <10% | fragments | and specular | ~4000 kg m−3 | temperature | track A with single | |
| - Consolidated | collected on tip | reflection | requires | or multiple terminals, | ||
| - High strength | 5–15 μm | 0.1 μm particles | tens of nm, 1–100 μm | |||
Notes. The table collects mostly sizes (all in diameter) for intercomparison and classifications into morphological groups following Sect. 2.2. A visual representation of this table is presented in Fig. 12. The terminology used in particular for Stardust is described in detail in Sect. 3.7 (see also Fig. 10).
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