Asteroid positions are calculated using full planetary perturbations. All positions are plotted at equinox J2000.0. A 5-minute time limit has been placed on this service in order to be fair to other server requests. Users should be aware that a large field of view is computationally intensive as is a date more than 30 days in the past. If a user's request is not satisfied within 5 minutes, another request should be made with a significant decrease in the size of the field of view.
Users can sometime gain performance by making requests during hours when the server is least busy.
However, we cannot now predict when the server will be most available. The current UTC time is automatically supplied. You may change the time as you wish, but please use the same format as the default values. The location is specified as RA and Decl in sexagesimal. Shortcuts will not work.