Extended Data Table 1 Estimation of TD2c water-ice content

From: The Philae lander reveals low-strength primitive ice inside cometary boulders

  1. This table shows the estimation of the water-ice content of the bright spot observed at the crevice of the skull boulder from three separate observations by the OSIRIS instrument in mid-June 2016. Columns (left to right) show acquisition time of data; Δ, the distance between the spacecraft and the comet surface; α, the phase angle; Area, the estimated area of the bright spot; and ρ, the water-ice fraction at both 30 μm and 100 μm. The 14 June 2016 10:30:32 image provides the highest value, as the illumination into the crevice and the viewing conditions were both the best at that time.
Back to article page