Graphic Timetable - Moving Object

  This type of timetable is for solar system objects, typically comets or minor planets. There are separate options for the major planets. The example below shows how different the timetable is from a fixed object, particularly if the object comes relatively close to the Earth. In this case the comet is not well placed in early December, the grey bars show how the moon dominates in late December. By the dark of the moon in early January it is much higher in the sky and by early February is almost overhead at dusk.

 
   
 
For comets the timetable can be very useful for working out when it will be in a dark sky, this makes a considerable difference to the amount of detail that can be seen. You still need good weather and the comet has to be bright enough to be visible of course.

Moving objects need orbital elements which can be entered using the Edit, Moving objects option. There are also tools for importing elements from other published sources.
 

   Richard Fleet 2004

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