Sometimes the star constellations are named after kings and queens of gods.
In this case you should also look at the drawing and do a google image seach with just star constellations and try to spot the correct one.
This is the low-spoiler guide for "Mythical royalty" puzzle in Chinatown Detective Agency. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.