This is particularly handy for specifying the latitude and longitude of your observing site so that correct altitude and azimuth values are displayed in the ephemeris, but you can use it to preset any parameter given below, including specifying orbital elements to track a comet or asteroid.
If you're not happy with the result when you press "Update", come back to this page by pressing "Back" and adjust the parameters until you obtain the desired result, then save the request in your browser's hotlist or bookmark table.
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