Help Shape the Future of Space Exploration

Join The Planetary Society Now  arrow.png

Join our eNewsletter for updates & action alerts

    Please leave this field empty

Headshot of Emily Lakdawalla

How to watch Juno's orbit insertion

Posted by Emily Lakdawalla

01-07-2016 17:22 CDT

Topics: mission status, Juno

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, 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.

EventTime (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

If you're nervous about the orbit insertion (as I will be), consider downloading and coloring in this Juno coloring page from artist Go Miyazaki!

See other posts from July 2016


Or read more blog entries about: mission status, Juno


sepiae: 07/02/2016 07:49 CDT

Those lizardtail-kids rock !! Thanks for posting this. Meanwhile NASA's Eyes appears to be - down? I'll be nail-biting along... :)

Rick D'Haene: 07/02/2016 03:58 CDT

I attended the Mars Invasion! event at the Mount Baker Theater in Bellingham on June 27th and I wanted to thank you for your participation. I found it to be very informative and educational. I've enjoyed reading your posts over the past few days as well. I'm excited to be able to follow along with the happenings of a mission I learned about only a few days ago, thanks to this post in particular. Thank you for what you do.

Mark: 07/04/2016 02:21 CDT

The Juno real-time simulator is marvellous. Go and try it now ...

Leave a Comment:

You must be logged in to submit a comment. Log in now.
Facebook Twitter Email RSS AddThis

Blog Search

Planetary Defense

An asteroid or comet headed for Earth is the only large-scale natural disaster we can prevent. Working together to fund our Shoemaker NEO Grants for astronomers, we can help save the world.


Featured Images

LightSail 2 and Prox-1
Bill Nye at LightSail 2 pre-ship review
LightSail 2 pre-ship review team photo
Swirling maelstrom
More Images

Featured Video

Class 9: Saturn, Uranus, and Neptune

Watch Now

Space in Images

Pretty pictures and
awe-inspiring science.

See More

Join The Planetary Society

Let’s explore the cosmos together!

Become a Member

Connect With Us

Facebook, Twitter, YouTube and more…
Continue the conversation with our online community!