You didn't say what type of Star eggs you have, but I used to cool my Burmese Stars eggs at temps from 12C-15C (54F to 60F) for 4 weeks before incubating them. I don't think 9 hours at 77F will have any deleterious effect on your eggs, especially after only 5 days of incubation.Due to a power outage today, my star eggs in the incubator experience 9hours in 25c temps. Its just their 5th day inside. Will they be all right?