By: Steve Goldberg (Posted 3/18/2019)
This asterism is called “Greg’s 3” because it was discovered by Greg Parker. It is located inside a triangle with stars Regulas α Leo, Eta η Leo and the “center” star in Cancer, Delta δ.
Here is the asterism with the “3” drawn in.
Here is an article from 2013 in “Earth Science Picture of the Day” publication. Read the article here.