NOTE: Ground-Based Observations of Cloud Features on Uranus
Baines, K. H.; Sromovsky, L. A.; Fry, P. M.; Spencer, J. R.
United States
Abstract
NSFCAM observations at 1.7 μm in 1998 and 1999 recorded the first discrete cloud features to appear in ground-based digital images of Uranus and the brightest such feature ever observed. The differential contributions of these northern hemisphere features to Uranus' disk-integrated brightness range from 0.8±0.2% and 0.11±0.3% for two 1998 features, to 4.9±0.7% for one 1999 feature, which is four times the value measured in 1998 NICMOS images at similar wavelengths.