This scale allows you to graphically compare objects by declination coordinates.
To the left of the scale are objects with a southern declination, to the right - with a northern declination.
The scale is limited to 30 degrees. Almost all the main objects are in this range.
There is a red horizontal line on the scale indicating the maximum declination of the Sun - 23°26'. It helps to quickly visually identify the so-called "Out-of-bounds" planets.
It is possible to exclude lots from the objects taking part in the calculation. This can be done from the context menu.