{"id":62,"date":"2015-05-15T19:00:02","date_gmt":"2015-05-15T10:00:02","guid":{"rendered":"http:\/\/astro.ksgnet.org\/?p=62"},"modified":"2020-06-06T21:29:52","modified_gmt":"2020-06-06T12:29:52","slug":"ic4603-and-ic4604","status":"publish","type":"post","link":"https:\/\/astronote.ksgnet.org\/index.php\/2015\/05\/15\/ic4603-and-ic4604\/","title":{"rendered":"IC4603 and IC4604"},"content":{"rendered":"

IC 4604 is a large diffuse nebula of 5th magnitude located in the southwestern corner of the constellation Ophiuchus, surrounding the bright triple star Rho Ophiuchi. Several regions of bright and dark nebulosity surround this area, which takes its name from \u03c1 Oph.<\/p>\n

Highlighted by the bright star Antares, the region provides an impressive spectacle of colorful glowing gases, juxtaposed with converging dark rivers of thick dust. Other areas of nebulosity within the region include IC 4603, centered around the star SAO 184376; and IC 4605, around 22 Scorpii. The nebulosity around Antares itself (\u03b1 Sco) is designated IC 4606. Dark nebulae Barnard 45 and Barnard 42 separate the reflection nebulosity near \u03c1 Oph (IC 4603 and IC 4604) from the nebulosity closer to 22 Sco and Antares (IC 4605 and IC 4606). Barnard 44 lies to the east.<\/p>\n

At a distance of some 540 light-years, IC 4604 is one of the nearest star-forming regions to the Sun. The colorful clouds surrounding Rho Ophiuchi represent the visible counterpart of a much larger but invisible molecular cloud permeating the region. This Ophiuchus cloud lies well above the plane of the galaxy, near the border of the Scorpius-Centaurus OB association. About 1.5 million years ago, a massive star in upper Scorpius exploded as a supernova, sending a powerful shock wave through the Ophiuchus cloud about 1 million years ago, triggering star formation that is still continuing today.<\/p>\n

\uff08quote from SkySafari\uff09<\/p>\n

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>>>>>\u00a0Show full size photograph on the new tab.<\/a>\u00a0<<<<<<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Date and Place<\/td>\n2015-05-13 Oborotaki, Fukushima<\/td>\n<\/tr>\n
Scope<\/td>\nTakahashi Epsilon180ED + BetaSGR Focuser<\/td>\n<\/tr>\n
Mount<\/td>\nCelestron CGEM<\/td>\n<\/tr>\n
Camera<\/td>\nAtik383L+
\n-15[deg-c]<\/td>\n<\/tr>\n
Auto guiding<\/td>\nOff-axis Superstar + GPUSB<\/td>\n<\/tr>\n
Filter<\/td>\nAstrodon Tru-balance Gen.2 LRGB Filter 36[mm] Unmounted<\/td>\n<\/tr>\n
Exposure<\/td>\nL : 18x 600[s]
\nR : 4x 420[s], G : 4x 420[s], B : 9x 420[s]
\nTotal : 271[min]<\/td>\n<\/tr>\n
Software<\/td>\nAstroart5 SP3 with SHS Version 4.0 beta 1
\nPHD Guiding 2.3.1
\nSky Safari Pro 4.0.5
\nStella Image 6Photoshop<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u3053\u306e\u4f5c\u54c1\u64ae\u5f71\u6642\u306e\u30d6\u30ed\u30b0\u306f\u3042\u308a\u307e\u305b\u3093<\/p>\n","protected":false},"excerpt":{"rendered":"

IC 4604 is a large diffuse n…<\/p>\n","protected":false},"author":1,"featured_media":54,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"footnotes":""},"categories":[8,9],"tags":[14,13,24,16,22,23,17],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/posts\/62"}],"collection":[{"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/comments?post=62"}],"version-history":[{"count":5,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":276,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/posts\/62\/revisions\/276"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/media\/54"}],"wp:attachment":[{"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/media?parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/categories?post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/tags?post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}