Table 3
Water-ice content estimates for the bright and spectrally flat features observed in 25 June 2016 images.
Time | ROI | Spectral slope | Ice content (%) |
---|---|---|---|
[%/100 nm] | |||
2016-01-27T18h36 | New scarp | 10.3 | 11.3 |
2016-06-25T01h37 | Circle | 20.3 | 0, DT |
2016-06-25T01h37 | Red star | 9.7 | – |
2016-06-25T01h37 | Blue star (new scarp) | 2.1 | 26.5 |
2016-06-25T01h37 | Green triangle | 20.3 | – |
2016-06-25T01h37 | Magenta square | −2.4 | 11.0 |
2016-06-25T11h50 | Circle | 17.9 | 0, DT |
2016-06-25T11h50 | Red star | 7.2 | – |
2016-06-25T11h50 | Blue star (new scarp) | 2.1 | 29.5 |
2016-06-25T11h50 | green triangle | 7.15 | 7.5 |
2016-06-25T11h50 | Magenta square | −0.4 | 38.0 |
Notes. Symbols refer to the ROIs represented in Fig. 13. The water-ice abundance was estimated using a linear mixing model of water ice and cometary dark terrain. For completeness, we also report the estimate of the water-ice abundance at the base of the new scarp from a color sequence acquired on 27 January 2016, shortly after the new structure formed. These values should be compared with those indicated by the blue star, which correspond to the same location at the base of the new scarp. For the frost pointed out by the red star, we only report the spectral slope because the normal albedo cannot be estimated as the frost lies in shadow. Errors in the spectral slope are on the order of 0.5%/100 nm.
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