{"id":11202,"date":"2026-04-12T09:16:21","date_gmt":"2026-04-12T13:16:21","guid":{"rendered":"https:\/\/starlightcascade.ca\/blog\/?p=11202"},"modified":"2026-04-12T09:16:21","modified_gmt":"2026-04-12T13:16:21","slug":"jupiter-20260411","status":"publish","type":"post","link":"https:\/\/starlightcascade.ca\/blog\/2026\/04\/jupiter-20260411\/","title":{"rendered":"Jupiter 20260411"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Saturday evening was my 12th imaging session of the year… and cold enough that my sinuses were not happy this morning!<\/p>\n

Last night was a special event.. the moon Callisto eclipsed by Jupiter and it came out from behind Jupiter at approx 00:27UTC. Jupiter is now about 37 arcseconds in diameter.<\/p>\n

Standard equipment: skywatcher AZ-EQ6GT mount, Celestron C9.25 schmidt cass OTA, x1.5 barlow, moonlight remote focuser, UV\/IR cut filter, ZWO ASI 585MC camera. A front plate heater and a short dew shield are also part of the setup.<\/p>\n

Tracking continues to be an issue, with 3 or 4 manual corrections needed each 120sec run. The ROI and cutout field of view is approx 60-70 arcseconds square.<\/p>\n

Seeing was poor 2\/10, transparency was poor 3\/10. Jupiter was61 degrees altitude but its azimuth is already 220degrees and getting worse.. closer to the sun. It was actually still in dusk when I started the imaging session. Temps were a little cool, around +1C with a slight wind and no moon.<\/p>\n

I have experimentally added my first line annotations, pointing out Callisto.<\/p>\n

This was the best 5% of 13K frames at 4ms each. Interestingly, something happened in the middle of the session that affected one imaging run (120 sec with a 60 sec pause between each). I have attached the results of that as well. My best guess is an aircraft contrail, as there were not a lot of clouds in the sky at the time. Additionally the swamp peeper frogs were out loudly proclaiming their presence, as was some coyotes in the distance.<\/p>\n","protected":false},"excerpt":{"rendered":"

Saturday evening was my 12th imaging session of the year… and cold enough that my sinuses were not happy this morning! Last night was a special event.. the moon Callisto eclipsed by Jupiter and it came out from behind Jupiter at approx 00:27UTC. Jupiter is now about 37 arcseconds in diameter. Standard equipment: skywatcher AZ-EQ6GT […]<\/p>\n","protected":false},"author":3,"featured_media":11203,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-11202","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomy"],"_links":{"self":[{"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/posts\/11202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/comments?post=11202"}],"version-history":[{"count":1,"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/posts\/11202\/revisions"}],"predecessor-version":[{"id":11204,"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/posts\/11202\/revisions\/11204"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/media\/11203"}],"wp:attachment":[{"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/media?parent=11202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/categories?post=11202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starlightcascade.ca\/blog\/wp-json\/wp\/v2\/tags?post=11202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}