The big day is almost here. Juno begins firing its main engine at 20:18 PT / 23:18 ET / 03:18 UT on July 4/5, and the maneuver should be over 35 minutes later at 20:53 / 23:53 / 03:53. Here's how you can follow the mission through its most hazardous event since launch.

NASA TV will begin broadcasting live beginning 19:30 PT / 22:30 ET / 02:30 UT. You can watch NASA TV online here, or via UStream.

There are two real-time simulators you can watch to get a sense of Juno's position, already available. They are NASA's Eyes on the Solar System, which has added a lot of content relevant to the orbit insertion, and a neat amateur-produced visualization at lizard-tail.com, made by Isana Kashiwai and Go Miyazaki. It'll also be fun to watch Juno making constant contact with different Deep Space Network antennae via DSN Now.

Twitter will be a fantastic place to watch. I'll be at the Jet Propulsion Laboratory all day on Monday, tweeting events as I witness them, and working myself up to a fever pitch of anticipation.

Here's a timeline of the events remaining until orbit insertion. All spacecraft events are Earth Received Time -- what time we will learn of these events happening back here on Earth, factoring in the 48 minutes it takes for radio signals from Juno to reach us.