The date defaults to the current day on your computer.

You need only an estimate of the seeing FWHM. Each target has a seeing threshold, and as your seeing estimate approaches the threshold, the priority for the target starts decreasing. If it exceeds the threshold the priority becomes zero.

The priority number (high number=high priority) tries to factor in previous observations, project completeness, project priority, conditions, and relative visibility from January through April. Monitoring projects once started have a priority driven by the necessary monitoring cadence. Objects with too low a priority are not listed. If you want to see a list of all the targets, change the DISPLAY button to "All Visible Targets" (still including the restrictions created by your seeing and conditions estimate) and then "Submit Request". The DISPLAY button will reset itself to "Prioritized Targets" automatically

If you want to look at only presently visible targets rather than the full night, switch the "Show Time Range" button to "Now Plus 2 Hours" rather than "All"

After an observation of a target, you should click on the "done" button. This updates the history lists and if you "submit request" again the target list and the priorities will be updated.

Clicking on the object name gives you information on the target and the observing plan. Please read this before carrying out the observation.

Last JD gives the last date on which the target was observed. The observability is given as a function of local time. Targets should be observed only during the black times. Red entries are produced if the sun is up ("sun"), if the target is down ("down"), if the target is too close to the Moon ("moon??" where ?? is the angle between the object and the Moon). Orange entries indicate that the airmass is too high. The decimal numbers give the airmass.