Hi all.
I am relatively new to planetary observing.
I have noticed there is a double transit of Jupiter’s moons (Io and Ganymede) on the evening Monday 30 December, but it happens before civil twilight begins in Eastern Australia. There are also double shadows before and during civil twilight, but the double act ends before nautical twilight begins.
Would it be worth looking at from an urban location, or would the amount of light in the sky make it too difficult to see?
I will be using a standard 8-inch Dobsonian telescope.
The AEDT times are:
- 7:08 Io transit ingress
- 7:43pm Io shadow ingress
- 9:20pm Io transit egress
- 9:55pm Io shadow egress
- 6:24pm Ganymede transit ingress
- 8:28pm Ganymede transit egress
- 8:37pm Ganymede shadow ingress
- 10:52pm Ganymede shadow egress
- 9:15pm civil twilight begins in Melbourne
- 9:54pm nautical twilight begins in Melbourne
- 10:38pm astronomical twilight begins in Melbourne
Thanks for your thoughts.