When it is at 3 it is at lower culmination, and the star spica is on the meridian.
"A Text-Book of Astronomy"
George C. Comstock
This may be found from the Great Bear; for if the line joining the two stars a and g in that constellation be prolonged with a slight curve, it will conduct the eye to spica.
"The Story of the Heavens"
Robert Stawell Ball
Again, in the system of spica we have two great suns swinging round each other in only four days, at a distance equal to that between Saturn and his sixth satellite.
"The Story of the Heavens"
Robert Stawell Ball