Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
Latest Breaking News
General Discussion
The DU Lounge
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
Science
Related: About this forumTimeline of Juno Jupiter Orbit Insertion events
http://www.planetary.org/blogs/emily-lakdawalla/2016/06161235-timeline-of-juno-jupiter-orbit-insertion.html
Timeline of Juno Jupiter Orbit Insertion events
Posted by Emily Lakdawalla
2016/06/16 19:55 UTC
Topics: mission status, Juno
Today NASA held a press briefing and released a press kit for the impending orbit insertion of the Juno spacecraft. The 35-minute orbit insertion burn is scheduled to begin July 5 at 03:18 UTC (July 4 20:18, PDT). Juno gets one chance at a successful orbit insertion; if it overshoots Jupiter, it goes into an inclined solar orbit that likely won't ever return to the giant planet. At the briefing today, project manager Rick Nybakken said that it would take at least 20 minutes of rocket firing for Juno to enter orbit successfully, and 30 minutes for it to enter a good science orbit. If something happens during orbit insertion, the spacecraft has an auto-restart capability that will allow it to try to recover from an anomaly and continue firing the rocket within 500 seconds.
Following is a timeline of orbit-insertion-related events that I cobbled together from the JPL media schedule and the press kit. All times are Earth Received Time; the actual events unfold 48 minutes earlier than these times, according to the spacecraft clock. A live broadcast will take place on NASA TV during orbit insertion. I'll be reporting live (mostly on Twitter) from the Jet Propulsion Laboratory. Go Juno!
InfoView thread info, including edit history
TrashPut this thread in your Trash Can (My DU » Trash Can)
BookmarkAdd this thread to your Bookmarks (My DU » Bookmarks)
2 replies, 725 views
ShareGet links to this post and/or share on social media
AlertAlert this post for a rule violation
PowersThere are no powers you can use on this post
EditCannot edit other people's posts
ReplyReply to this post
EditCannot edit other people's posts
Rec (7)
ReplyReply to this post
2 replies
= new reply since forum marked as read
Highlight:
NoneDon't highlight anything
5 newestHighlight 5 most recent replies
Timeline of Juno Jupiter Orbit Insertion events (Original Post)
NeoGreen
Jun 2016
OP
Chichiri
(4,667 posts)1. Why will Juno be spinning at 5 rotations per minute during the burn?
Is that for stability?
localroger
(3,636 posts)2. Yes, spin stabilization is much simpler and more robust
New Horizons was also spin stabilized when it maneuvered. The good news is it makes for a simpler spacecraft with fewer parts to break and things to go wrong; the bad news is it can't communicate with Earth while it is in spin-to-burn mode. Older craft like Galileo and the Voyagers didn't spin but this requires the perfect function of a lot of gyroscopes, reaction wheels, and more thrusters than the spin system needs.