It can be figured out (rectified). I've successfully done it for everyone in my family since they don't believe in astrology so I couldn't really ask for their birth times... plus most people don't know when they were born. And I wanted to know their charts.
It can take a while of going back and forth with your chart... fiddling around with it. To rectify, use https://alabe.com/freechart/ and not astro.com. Alabe lets you just click on the back button to change the time and then submit for a quick new chart. Astro.com takes too much time to change birth data, and when you have to go back and forth dozens of times, you'll want to save some time.
So to rectify... make the chart with your approx time of birth. Or just noon if not known at all. Look to see where the planets are, compare the info on planetary placements on Azazels astrology (or just your own knowledge, depends on your astro level).
