For tonight's "triple transit, here are the event times. Remember, these times are for
ARIZONA, mountain time.
Saturday, 3/27: 7:59 pm, Callisto, Egress from Transit (nothing exciting
here)
" , 3/27: 9:59 pm, Callisto, Shadow Ingress (first shadow
appears - then wait 2.5hrs until the second shadow appears)
" , 3/27: 10:44 pm, Ganymede, Ingress Transit
" , 3/27: 11:32 pm, Europa, Occultation Disappearance (goes
behind the planet)
" , 3/27: 11:59 pm, Io, Ingress Transit
Sunday, 3/28: 12:32 am, Io, Shadow Ingress (second shadow appears)
" , 3/28: 1:00 am, Ganymede, Shadow Ingress (Triple shadow transit
begins)
" , 3/28: 1:19 am, Callisto, Shadow Egress (and then there are
two)
" , 3/28: 2:05 am, Ganymede, Egress from Transit
" , 3/28: 2:14 am, Io, Egress from Transit
" , 3/28: 2:48 am, Io, Shadow Egress (and then there is one)
" , 3/28: 3:27 am, Europa, Eclipse Reappearance (becomes visible
after being behind the planet)
" , 3/28: 4:23 am, Ganymede, Shadow Egress (and then there are
none)
So the triple shadow event is visible from 1:00 am to 1:19 am. To have
three shadows transiting the planet at one time is rather rare. This is the
only occasion of it happening this year. Jupiter's Red Spot will be on the
central meridian of Jupiter at 4:48 am (3/28)
Go out if you get the chance, this doesn't happen often. It's Sunday, you can sleep-in.
