right ascension and declination grid

[Rick Nungester]

Turn off all display layers and then turn on Stars, Right Ascension and Declination Grid, and Manual Mode.  Notice there are 19 Declination rings between the North Pole and South Pole, or 20 steps to get from one pole to the other.  1 ring represents 180/20 = 9 degrees.  It seems like every 10 degrees (17 rings between the poles) would be much more useful in reading the declination of an object.  Am I misunderstanding something, or is this a defect in the app?

[Rick Nungester]

And a related thought -- Right ascension is annotated on the equator line from "0h" to "22h" every 2 hours (very useful).  It would be equally useful to have declination annotated from -80 to +80 degrees, every 20 degrees skipping 0, on the right ascension = 0h and 12h lines.