The main engine of the H-IIA rocket will burn for only about six and a half minutes, and the second stage's first firing will be complete after 11 minutes. Then the spacecraft coasts in orbit for about an hour and a half before firing again. An hour and 47 minutes after the launch (15:09 JST / 06:09 UT / 22:09 PT), Hayabusa2 will separate from the launcher and begin its journey to 1999 JU3. (I suspect that the asteroid will get a more colloquial name after a successful Hayabusa launch, as Itokawa did in 2003, but until then, it's just 1999 JU3.) After Hayabusa2 departs, three more mini-satellites will push off: Shin-en 2, ARTSAT2-DESPATCH, and PROCYON. One more mini-spacecraft, the MASCOT lander built by French and German space agencies CNES and DLR, will remain attached to Hayabusa2. Here is a detailed timeline of today's events:
Time Dec 2 PST
Time Dec 3 UTC
Time Dec 3 JST
Solid rocket burnout
Solid rocket separation
First stage main engine cutoff (MECO)
Second stage engine start
Second stage engine stop (SECO1)
Second stage engine 2nd start
Second stage engine 2nd cutoff (SECO2)
Shin-en 2 2 separation
Shin-en 2 is a student-built ultralight satellite carrying an amateur radio transponder; ARTSAT is a 3D-printed sculpture containing a computer that will generate and transmit poetry to Earth; and PROCYON is a microsatellite that will return to Earth for a gravity assist in 2015 that will send it on to a near-Earth asteroid flyby, the target of which has yet to be selected.
While we're tapping our feet through the two hours after launch, you might check out these cute Hayabusa2 manga from artist Go Miyazaki: "Departure" in English or Japanese, and "Hayabusa2 and MASCOT" in English or Japanese. (The English versions preserve the read order of the original Japanese manga format, which means you start with the upper right panel and read down, then shift left.) I printed these out and gave them to my daughters to color! Or you can watch this 12-minute video giving an overview of Hayabusa2 and how it differs from the first Hayabusa:
Go H-IIA! Go Hayabusa2! On Shin-en, on ARTSAT, on PROCYON and MASCOT! On Donner and Blitzen and....wait.