How to watch Juno's orbit insertion
Posted by Emily Lakdawalla
01-07-2016 17:22 CDT
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.
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.
|Event||Time (PDT)||Time (EDT)||Time (UTC)|
|Pre-orbit-insertion briefing||4 Jul 09:00||4 Jul 12:00||4 Jul 16:00|
|Begin transmitting tones; switch telecom to medium gain antenna||4 Jul 18:13||4 Jul 21:13||5 Jul 01:13|
|Begin slow, first turn of 15 degrees away from the Sun, toward orbit insertion attitude||4 Jul 18:16||4 Jul 21:16||5 Jul 01:16|
|Begin fast, large turn to orbit insertion attitude||4 Jul 19:28||4 Jul 22:28||5 Jul 02:28|
|NASA TV broadcast begins||4 Jul 19:30||4 Jul 22:30||5 Jul 02:30|
|Switch to toroidal low gain antenna||4 Jul 19:41||4 Jul 22:41||5 Jul 02:41|
|Begin nutation damping activity to remove remaining wobble||4 Jul 19:45||4 Jul 22:45||5 Jul 02:45|
|Begin fine-tune adjustment of the orbit insertion attitude||4 Jul 19:50||4 Jul 22:50||5 Jul 02:50|
|Begin approx. 5-minute spin-up from 2 to 5 rotations per minute||4 Jul 19:56||4 Jul 22:56||5 Jul 02:56|
|Jupiter orbit insertion burn begins||4 Jul 20:18||4 Jul 23:18||5 Jul 03:18|
|Start 35-minute main engine burn||4 Jul 20:18||4 Jul 23:18||5 Jul 03:18|
|Capture into Jupiter orbit achieved||4 Jul 20:38||4 Jul 23:38||5 Jul 03:38|
|Jupiter orbit insertion burn ends||4 Jul 20:53||4 Jul 23:53||5 Jul 03:53|
|Close propulsion pressurant valves, ending burn||4 Jul 20:53||4 Jul 23:53||5 Jul 03:53|
|Begin approx. 5-minute spin-down from 5 to 2 rotations per minute||4 Jul 20:55||4 Jul 23:55||5 Jul 03:55|
|Begin turn to sun-pointed attitude||4 Jul 21:07||5 Jul 00:07||5 Jul 04:07|
|Switch telecom to medium gain antenna||4 Jul 21:11||5 Jul 00:11||5 Jul 04:11|
|Begin transmitting telemetry (it could take 20 minutes or more to lock onto telemetry signal)||4 Jul 21:16||5 Jul 00:16||5 Jul 04:16|
|Post-orbit-insertion briefing||4 Jul 22:00||5 Jul 01:00||5 Jul 05:00|
|Capture Orbit Phase begins||4 Jul 22:48||5 Jul 01:48||5 Jul 05:48|