Table 4 Spectroscopic observations of asteroid Ryugu since its discovery in 2001. Spectral and compositional characteristics are listed
Reference | Spectral interval (μm) | Taxonomy type (T = Tholen; BD = Bus-De Meo) | Meteoritical counterpart | Spectral characteristics |
|---|---|---|---|---|
Binzel et al. 2001 | 0.4–0.9 | Cg (BD) | N.A. | UV drop-off: red (0.4–0.65 μm); flat (0.65–0.9 μm) |
Vilas 2008 | 0.42–0.93 | C (T) | CM2 | Band at 0.7 μm; flat with very weak band at 0.6 μm |
Abe et al. 2008 | 0.4–2.4 | C | N.A. | Flat and featureless spectral slope (0.85–2.2 μm) 0.89 ± 0.03%/1000 Å |
Lazzaro et al. 2013 | 0.4–0.85 | C | N.A. | Flat and featureless UV drop-off (< 0.45 μm) |
Pinilla-Alonso et al. 2013 | 0.85–2.2 | C | N.A. | Featureless spectral slope (0.85–2.2 μm) 0.37 ± 0.28%/1000 Å |
Sugita et al. 2013 | 0.47–0.8 | 163 Erigone family | CM (heated Murchison) | Flat and featureless |
Moskovitz et al. 2013 | 0.44–0.94 | C (BD) | CM (heated Murchison) CI (Y-86029) | Spectrally flat |
Perna et al. 2017 | 0.35–2.15 | C (BD) | heated Murchison CM unusual/heated CI | Featureless UV drop-off (< 0.45 μm); spectral slope (0.5–0.8 μm) |
Le Corre et al. 2018 | 0.8–2.4 | C | CM2 carbonaceous chondrites, Mighei (grain size < 40 μm) and ALH83100 (grain size < 100 μm) | Near-perfect match with NEA (85275) 1994 LY and Mars-crossing asteroid (316720) 1998 BE7 |