{"id":675,"date":"2021-08-31T02:05:24","date_gmt":"2021-08-31T02:05:24","guid":{"rendered":"http:\/\/www.skycaramba.com\/monthly\/?p=675"},"modified":"2021-08-31T02:05:24","modified_gmt":"2021-08-31T02:05:24","slug":"september-2021","status":"publish","type":"post","link":"https:\/\/www.skycaramba.com\/monthly\/september-2021\/","title":{"rendered":"September 2021"},"content":{"rendered":"\n

This\nmonth, Mars is retreating from the evening sky into the sun’s light.\nNorthern hemisphere sky watchers shouldn’t expect to see it. Southern\nhemisphere observers probably won’t see it either, but they have a\nslightly better chance.<\/p>\n\n\n\n

\"Venus<\/figure>\n\n\n\n

Mercury\nis moving into the evening sky for the first half of the month. A\nwaxing crescent moon passes somewhat nearby on the 9th<\/sup>.\nAfter greatest elongation at 26.8\u00b0 east of the sun on the 14th<\/sup>,\nthe messenger planet continues moving eastward against the background\nof stars (direct motion) toward Spica while its apparent separation\nfrom the sun shrinks. The planet settles into a position near Spica\nin the last few days of September.<\/p>\n\n\n\n

Venus,\nalso an evening object, starts the month near Spica and passes it on\nthe 6th<\/sup>.\nThe moon is close to Venus on the 10th<\/sup>.\nPassing near Zubenelgenubi around the 22nd<\/sup>,\nVenus enters the Libra diamond by the 26th<\/sup>.\nIt’s almost out of the diamond on the 30th<\/sup>.<\/p>\n\n\n\n

The\nbest views of these evening setters will be from the southern\nhemisphere, especially from around 20\u00b0 to 30\u00b0 south.<\/p>\n\n\n\n

\"Jupiter<\/figure>\n\n\n\n

Jupiter\nand Saturn are retrograde (going westward) in Capricornus this month.\nJupiter is near Deneb Algedi all month and moving fast enough to see\nits position has changed if you watch every few nights. Saturn is\nwest of Jupiter. The ringed planet’s motion slows down enough in the\nlast few days of September to be called stationary in almanacs that\nstill use the term. These two planets being in the constellation make\nSeptember a great month to learn about the stars of Capricornus. The\nnearly full moon passes Saturn on the 17th<\/sup>\nand Jupiter on the 18th<\/sup>.<\/p>\n\n\n\n

\"Wide<\/figure>\n\n\n\n
\"A<\/figure>\n\n\n\n

Neptune\nwill be at opposition this month. You need a telescope or binoculars\nto see it. You also have to know exactly where to look. To make sure\nyou’ve seen it, look several times this month and try to see that the\nfaint blue dot has moved. It’ll be nearest a star labeled HIP115953,\nwhich is brighter than Neptune and is about 154 light years away.\nThat star is actually at the limit of naked eye visibility for people\nwith very good eyes and very dark skies. The two will be just 1.5′\napart on the 23rd<\/sup>\nand 24th<\/sup>.\nNeptune’s distance from us this month is about 4.326 billion\nkilometers.<\/p>\n\n\n\n

Earth\nis at equinox on the 22nd<\/sup>\nat 19:22UT.<\/p>\n\n\n\n

Notable conjunctions in September:<\/p>\n\n\n\n

3rd<\/sup> Moon and Pollux\n3.0\u00b0<\/p>\n\n\n\n

5th<\/sup> Venus and Spica\n1.6\u00b0<\/p>\n\n\n\n

5th<\/sup> Moon and\nRegulus 4.5\u00b0<\/p>\n\n\n\n

7th<\/sup> Mars and moon\n3.8\u00b0<\/p>\n\n\n\n

9th<\/sup> Mercury and\nmoon 5.9\u00b0<\/p>\n\n\n\n

9th<\/sup> Moon and Spica\n5.3\u00b0<\/p>\n\n\n\n

10th<\/sup> Venus and moon\n3.7\u00b0<\/p>\n\n\n\n

12th<\/sup> Ceres and Aldebaran 0.9\u00b0<\/p>\n\n\n\n

13th<\/sup> Moon and\nAntares 4.1\u00b0<\/p>\n\n\n\n

17th<\/sup> Moon and\nSaturn 3.7\u00b0<\/p>\n\n\n\n

18th<\/sup> Moon and\nJupiter 3.7\u00b0<\/p>\n\n\n\n

20th<\/sup> Moon and\nNeptune 3.6\u00b0<\/p>\n\n\n\n

21st<\/sup> Mercury and\nSpica 1.4\u00b0<\/p>\n\n\n\n

24th<\/sup> Uranus and\nMoon 1.2\u00b0<\/p>\n\n\n\n

26th<\/sup> Moon and\nAldebaran 6.0\u00b0<\/p>\n\n\n\n

30th<\/sup> Moon and\nPollux 2.7\u00b0<\/p>\n\n\n\n

The\nmoon begins September in waning gibbous phase. It’s new on the 7th<\/sup>,\nfirst quarter on the 13th<\/sup>,\nfull on the 20th<\/sup>,\nand last quarter on the 29th<\/sup>.<\/p>\n\n\n\n

The\nmoon is at northern lunistice at 25.9\u00b0 on the 2nd<\/sup>,\ngoes south of the equator on the 8th<\/sup>,\nreaches its southernmost at 26.0\u00b0 on the 15th<\/sup>,\ncrosses the equator northbound again on the 21st<\/sup>,\nand reaches a second northern lunistice this month on the 29th<\/sup>\nat 26.1\u00b0.<\/p>\n\n\n\n

Lunar\nperigee is on the 11th<\/sup>\nat 368,500km. Apogee is on the 26th<\/sup>\nat 404,700km.<\/p>\n","protected":false},"excerpt":{"rendered":"

This month, Mars is retreating from the evening sky into the sun’s light. Northern hemisphere sky watchers shouldn’t expect to see it. Southern hemisphere observers probably won’t see it either, but they have a slightly better chance. Mercury is moving into the evening sky for the first half of the month. A waxing crescent moon […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[],"class_list":["post-675","post","type-post","status-publish","format-standard","hentry","category-60"],"_links":{"self":[{"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/posts\/675","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/comments?post=675"}],"version-history":[{"count":4,"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/posts\/675\/revisions"}],"predecessor-version":[{"id":683,"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/posts\/675\/revisions\/683"}],"wp:attachment":[{"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/media?parent=675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/categories?post=675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skycaramba.com\/monthly\/wp-json\/wp\/v2\/tags?post=675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}