{"id":2876,"date":"2021-09-01T16:29:16","date_gmt":"2021-09-01T16:29:16","guid":{"rendered":"https:\/\/www.griffithmedia.org\/skyreport\/?p=2876"},"modified":"2021-09-01T16:29:16","modified_gmt":"2021-09-01T16:29:16","slug":"griffith-observatory-sky-report-through-september-30-2021","status":"publish","type":"post","link":"https:\/\/www.griffithmedia.org\/skyreport\/2021\/09\/01\/griffith-observatory-sky-report-through-september-30-2021\/","title":{"rendered":"Griffith Observatory Sky Report through September 30, 2021"},"content":{"rendered":"

\"Click<\/strong><\/a>LISTEN to this week\u2019s Sky Report<\/p>\nhttps:\/\/www.griffithmedia.org\/skyreport\/wp-content\/uploads\/2021\/09\/Sep2021_SR.mp3<\/a><\/audio>\n

This is the Griffith Observatory Sky Report for the period between September 1 and September 30, 2021. Here are the events happening in the sky of southern California.<\/p>\n

Mercury<\/strong> is in the evening sky. On September 1, the sun sets at 7:18 p.m., PDT, and Mercury sets at 8:15 p.m., PDT. By the 30th<\/sup>, the sun sets at 6:38 p.m., PDT, and Mercury sets at 7:04 p.m., PDT. Mercury reaches greatest eastern elongation on the 13th<\/sup>. On that date, the sun sets at 7:02 p.m., PDT, and Mercury sets at 7:58 p.m., PDT. Although Mercury then appears farthest from the sun, it sets soon after because it is in the southern part of the constellation of Virgo the Virgin and so is close to the southwest horizon. Never observe Mercury when the sun is in the sky, for the risk of damage to the eyes is great.<\/p>\n

Venus<\/strong> is in the evening sky. On the 1st<\/sup>, the planet sets at 9:00 p.m., PDT, and on the 30th<\/sup>, Venus sets at 8:35 p.m., PDT. Venus offers a small disk in gibbous phase when viewed through a telescope. The planet slowly increases in size from 15 arcseconds to 19 arcseconds, while at the same time the gibbous phase slowly gets thinner, from 73 percent to 62 percent.<\/p>\n

Mars<\/strong> is close to the sun and unobservable until mid-November, when it appears in the morning sky.<\/p>\n

Jupiter<\/strong> rises in the east at 6:39 p.m., PDT, on the 1st<\/sup> and at 4:37 p.m., PDT, on the 30th<\/sup>, and so it will be visible all evening. A telescope will reveal features on the disk and the four Galilean moons, which travel in a rough line east to west across and behind Jupiter.<\/p>\n

Saturn<\/strong> rises in the east at 5:44 p.m., PDT, on the 1st<\/sup>, and at 3:46 p.m., PDT on the 30th<\/sup>. The planet is well placed for observations in the evening sky. A telescope will reveal Saturn\u2019s disk, its rings, and perhaps its brightest and largest moon, Titan.<\/p>\n

Uranus<\/strong> rises at 10:12 p.m., PDT, on the 1st<\/sup> and at 8:16 p.m., PDT, on the 30th<\/sup>. On the 15th<\/sup>, Uranus is at Right Ascension 2h 47m 30s, Declination +15\u00b0 41\u02b9 54\u02ba. The disk of Uranus is only 3.7 arcseconds wide, and so a telescope of magnification 150x is needed to show it.<\/p>\n

Neptune<\/strong> rises at 7:47 p.m., PDT, on the 1st<\/sup> and at 5:51 p.m., PDT, on the 30th<\/sup>. On the 15th<\/sup>, Neptune is at Right Ascension 23h 30m 28s, Declination -4\u00b0 27\u02b9 48\u02ba. The disk of Neptune is only 2.4 arcseconds wide, and so a telescope with a magnification of 150x is needed to show it.<\/p>\n

New moon occurs on the 6th<\/sup>, first quarter on the 13th<\/sup>, full moon on the 20th<\/sup>, and last quarter on the 28th<\/sup>.<\/p>\n

SPECIAL EVENTS<\/strong><\/p>\n

Autumn begins<\/strong>, and summer ends, when the sun reaches the autumnal equinox on September 22 at 12:21 p.m., PDT. At this moment, the sun crosses the celestial equator from north to south on its journey along the ecliptic.\u00a0 The sun rises at 6:42 a.m., PDT, and sets at 6:49 p.m., PDT. The day is 12 hours seven minutes long. The days will continue to shorten, and the nights get longer, until the sun reaches the winter solstice on December 21.<\/p>\n

Follow\u00a0All Space Considered<\/a> and\u00a0Griffith Observatory<\/a> on Twitter for updates on astronomy and space-related events.<\/p>\n","protected":false},"excerpt":{"rendered":"

LISTEN to this week\u2019s Sky Report https:\/\/www.griffithmedia.org\/skyreport\/wp-content\/uploads\/2021\/09\/Sep2021_SR.mp3 This is the Griffith Observatory Sky Report for the period between September 1 and September 30, 2021. Here are the events happening in the sky of southern California. Mercury is in the evening … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-2876","post","type-post","status-publish","format-standard","hentry","category-skyreport"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/posts\/2876","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/comments?post=2876"}],"version-history":[{"count":1,"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/posts\/2876\/revisions"}],"predecessor-version":[{"id":2878,"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/posts\/2876\/revisions\/2878"}],"wp:attachment":[{"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/media?parent=2876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/categories?post=2876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.griffithmedia.org\/skyreport\/wp-json\/wp\/v2\/tags?post=2876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}