Fig. 6

Brightness temperatures at Tycho crater in the nightside. The red points are the brightness temperatures at the latitude of 43.0°–43.5°S and longitude of 11.0°–11.5°E in Diviner GCP at channel 5. The blue and green points are the brightness temperatures at the center of Tycho crater in HSD at bands 11 and 14, respectively. The error bars are estimated from the background noise level in each image. The black dashed and dotted lines show surface temperature models of lunar rock and regolith at the latitude of 43°S, respectively. The yellow points are the best-fit regolith temperatures in our analysis