Cathy, I have the Edmund mag 5 star atlas(stars to 5.1, deep-sky to about 8. 0), The Philips' Color star atlas(stars to 6.75, deep sky to 11.0), and the Burhams' handbooks(objects listed to 15?). My coordinates are within 5 degrees, maybe within 3. It dosen't help when a tree is between the nearest bright star and your suspect. Jonathan