Calendar
You can select start date, end date and number of days between
each calculation, and the time when position are calculated.
By default the calculus are from current date for five days at 0h UT.
Beware calculation time if to much date are selected.
Twilight :
This screen show you the morning and evening twilight time for each
date you select.
Nautical twilight is when Sun is 12 degrees below horizon. Brighter
stars are visible.
Astronomical twilight is when Sun is 18 degrees below horizon. Sky
is dark and all stars are visible.
Planets :
Show the position, magnitude, apparent diameter, illuminated fraction,
rise, culmination and set time for the planets, the Moon and the Sun for
each selected date.
Comets :
Show the position, magnitude, Sun elongation, phase, rise, culmination
and set time for the selected comets.
The elevation above horizon and azimuth at the twilight time are indicated
to help observing comets near the Sun. This indicate if the comet is best
on the morning or evening.
 
|