Sun Jul 24 12:22:38 1994
Re antipodal features: Based on the timing provided by Spencer
et al., the dark feature they report appears to correspond to a
dark wave-like structure along the south edge of the North
Tropical Zone. It was prominent in our pre-impact images.
It is probably not related to the impacts.
Re evolution: Features are clearly being rapidly sheared and spread by Jovian winds. Looks like "one heck of a mess." :-)
Re large rings: We still see no evidence for large rings in Hubble imaging at any wavelength (aside from the ejecta veils, which are more visible when near the limbs of the planet). However, we do not have continuous temporal sampling. More careful timings from those who have reported them would help us to verify their existence.
Other notes: Q2 and N sites are so small that they are difficult to detect in our Wide Field images (0.1 arcsec/pixel).
Heidi Hammel, for the Hubble Space Telescope Comet Team