NASA\u2019s Juno spacecraft must complete a carefully-planned sequence of events as it closes in on Jupiter for a make-or-break orbit insertion burn July 4.<\/p>\n
The timeline posted below shows the schedule of major events in the weeks ahead of Juno\u2019s arrival at Jupiter, plus the minute-by-minute sequence of steps planned for July 4.<\/p>\n
Times below are listed in \u201cEarth Receive Time\u201d and Eastern Daylight Time (GMT-4) as confirmation of the Jupiter Orbit Insertion (JOI) events arrives on Earth. The one-way light travel time from Jupiter to Earth is approximately 48 minutes.<\/p>\n
\n<\/b>\nJune 20................Juno's main engine cover opened\nJune 27................Warm-up of Juno's helium pressurant tank\nJune 28................Pressurization of Juno's propulsion system\nJune 29 at 8:47 p.m....Juno's science instruments switched off\nJune 30................Final command sequence uplinked to Juno\nJuly 4 at 9:13 p.m.....Status tones start\nJuly 4 at 9:16 p.m.....Start initial precession to JOI attitude\nJuly 4 at 9:37 p.m.....End initial precession to JOI attitude\nJuly 4 at 10:28 p.m....Start fast precession to JOI attitude\nJuly 4 at 10:41 p.m....Switch to toroidal low-gain antenna\nJuly 4 at 10:45 p.m....Begin nutation damping\nJuly 4 at 10:50 p.m....Start final transition to JOI attitude\nJuly 4 at 10:53 p.m....Juno in JOI attitude\nJuly 4 at 10:56 p.m....Spin up from 2 to 5 rpm\nJuly 4 at 11:01 p.m....Juno spinning at 5 rpm\nJuly 4 at 11:18 p.m....Start JOI burn\nJuly 4 at 11:53 p.m....End JOI burn\nJuly 4 at 11:55 p.m....Begin spinning down from 5 to 2 rpm\nJuly 5 at 12:00 a.m....Juno spinning at 2 rpm\nJuly 5 at 12:07 a.m....Start precession from JOI to solar-pointing attitude\nJuly 5 at 12:11 a.m....Switch to medium-gain antenna; end status tones\nJuly 5 at 12:16 a.m....End precession to solar-pointing attitude\nJuly 5 at 12:36 a.m....Ground begins receiving detailed telemetry from Juno\nJuly 5.................Replay of high data-rate telemetry\nJuly 6.................Begin switch-on of Juno science payloads\nJuly 13................Post-JOI trajectory course correction (if necessary)\nAug. 27................First perijove (with science instruments activated)\nOct. 19................Period reduction maneuver (from 53.5-day to 14-day orbit)\nFeb. 20, 2018..........Nominal end of mission\n<\/pre>\nEmail the author.<\/i><\/b><\/p>\n
Follow Stephen Clark on Twitter: @StephenClark1.<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"
NASA\u2019s Juno spacecraft must complete a carefully-planned sequence of events as it closes in on Jupiter for a make-or-break orbit insertion burn July 4. The timeline posted below shows the schedule of major events in the weeks ahead of Juno\u2019s arrival at Jupiter, plus the minute-by-minute sequence of steps planned for July 4. Times below […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[1183,1929,1606,472,1561,2612],"class_list":["post-15423","post","type-post","status-publish","format-standard","hentry","category-news","tag-jet-propulsion-laboratory","tag-juno","tag-jupiter","tag-lockheed-martin","tag-planetary-science","tag-swri"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/15423"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=15423"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/15423\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=15423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=15423"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=15423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}