Without a birthtime there’s no way to cast a chart with an accurate ascendant. Because of that there’s also no way to know where the house cusps are. The other consideration is the placement of the Moon. Since the Moon moves about 13 degrees in a day it can happen that you’re faced with two possibilities for the Moon sign. Because of this I first cast the chart with a birthtime of midnight on the morning of birth. That way I know where the possibilities start.
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Without a birthtime there’s no way to cast a chart with an accurate ascendant. Because of that there’s also no way to know where the house cusps are. The other consideration is the placement of the Moon. Since the Moon moves about 13 degrees in a day it can happen that you’re faced with two possibilities for the Moon sign. Because of this I first cast the chart with a birthtime of midnight on the morning of birth. That way I know where the possibilities start.