Waybread,
I'm including some links to further info on Ceres.
http://www.astrologyweekly.com/forum...ead.php?t=8259
There is no time documented for Ceres discovery (apparently, Piazzi didn't take good notes) so we're forced to use the sunrise chart for the day she was discovered. This is standard astrological practice.
There are some good discussions about Ceres and other asteroids in previous threads on this forum too.
http://en.mimi.hu/astrology/ceres.html
http://www.astrologicallyspeaking.com/ceres.htm
Cheers,
Lillyjgc