((NGC objects:X-Y))
displays a ((navbox))
with links to all New General Catalogue objects from 7500 to 7840. For example:
((NGC objects:1-499))
displays links from NGC 1 to NGC 499((NGC objects:500-999))
displays links from NGC 500 to NGC 999((NGC objects:7500-7840))
displays links from NGC 7500 to NGC 7840