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SkyTools
Guided Tour Nightly
Events Planner
This
tool once again displays the familiar NightBar, but with a new
twist. As before the altitude of the object of interest
(in this case Jupiter) is drawn as a red dashed line. But
in addition, the time of each circumstance of an
event is marked. This
is a quick and easy way to see how visible the event will be
from your location.  In
the example above we selected the transit of Jupiter's moon
Europa (highlighted in blue). Looking at the NightBar we
see that ingress (when the satellite
first passes in front of the planet--marked as Tr. I on
the NightBar) occurs prior to the onset of twilight, while
Jupiter is still fairly low in the sky.
By
the time Europa is mid-way across the planet (Tr. M)
twilight has begun and Jupiter is fairly high in the sky,
offering an excellent view. Transit
egress (Tr. E) occurs after dawn. Next
Stop: Interactive
Atlas |
