{"id":364,"date":"2021-12-15T14:49:56","date_gmt":"2021-12-15T05:49:56","guid":{"rendered":"https:\/\/astronote.ksgnet.org\/?p=364"},"modified":"2022-01-03T20:45:40","modified_gmt":"2022-01-03T11:45:40","slug":"m78-and-ldn1622","status":"publish","type":"post","link":"https:\/\/astronote.ksgnet.org\/index.php\/2021\/12\/15\/m78-and-ldn1622\/","title":{"rendered":"M78 and LDN1622"},"content":{"rendered":"\n

Messier 78<\/b>\u00a0or\u00a0M78<\/b>, also known as\u00a0NGC 2068<\/b>, is a\u00a0reflection nebula<\/a>\u00a0in the\u00a0constellation<\/a>\u00a0Orion<\/a>. It was discovered by\u00a0Pierre M\u00e9chain<\/a>\u00a0in 1780 and included by\u00a0Charles Messier<\/a>\u00a0in his catalog of\u00a0comet<\/a>-like objects that same year.[3]<\/a><\/sup><\/p>\n

M78 is the brightest diffuse reflection nebula of a group of nebulae that includes\u00a0NGC 2064<\/a>,\u00a0NGC 2067<\/a>\u00a0and\u00a0NGC 2071<\/a>. This group belongs to the\u00a0Orion B molecular cloud complex<\/a>\u00a0and is about 1,350\u00a0light-years<\/a>\u00a0distant from Earth.[2]<\/a><\/sup>\u00a0M78 is easily found in small\u00a0telescopes<\/a>\u00a0as a hazy patch and involves two stars of 10th and 11th\u00a0magnitude<\/a>. These two\u00a0B-type stars<\/a>,\u00a0HD 38563 A<\/i><\/span>\u00a0and\u00a0HD 38563 B<\/i><\/span>, are responsible for making the cloud of dust in M78 visible by reflecting their light.[4]<\/a><\/sup><\/p>\n

The M78 cloud contains a cluster of stars that is visible in the\u00a0infrared<\/a>.[2]<\/a><\/sup>\u00a0Due to gravity, the molecular gas in the nebula has fragmented into a hierarchy of clumps,[2]<\/a><\/sup>\u00a0the denser cores of which about to form stars with masses of up to\u00a05\u00a0M<\/i>\u2609<\/sub><\/a><\/span>.[5]<\/a><\/sup>\u00a0About 45\u00a0variable stars<\/a>\u00a0of the\u00a0T Tauri<\/i>\u00a0type,[6]<\/a><\/sup>\u00a0young stars still in the process of formation, are members as well. Similarly, 17\u00a0Herbig\u2013Haro objects<\/a>\u00a0are known in M78.[7]<\/a><\/sup><\/p>\n

(quote from Wikipedia)<\/p>\n

\n

>>>\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>\n\n

2021-Nov-28
2021-Dec-03,04,10,11
Fujigane Remote Observatory, Yamanashi, Japan<\/p>\n<\/td>\n<\/tr>\n

Scope<\/td>\nTakahashi Epsilon180ED + BetaSGR Focuser<\/td>\n<\/tr>\n
Mount<\/td>\nSkywatcher EQ8<\/td>\n<\/tr>\n
Camera<\/td>\nZWO ASI6200MM-Pro : -15[deg-c]<\/td>\n<\/tr>\n
Auto guiding<\/td>\nQHY mini guide scope + ZWO ASI120<\/td>\n<\/tr>\n
Filter<\/td>\n\n

Astrodon Tru-balance Gen.2 E-series LRGB Filter<\/p>\n<\/td>\n<\/tr>\n

Exposure<\/td>\nEpsilon180ED + ASI6200MM-Pro
L : 120×600[s], R : 22×600[s], G :21×600[s], B : 21×600[s]
Total :1,840[min] = 30.6[hr]<\/td>\n<\/tr>\n
Software<\/td>\n\n

Astroart8 with SHS Version 7.6 Build 89
PHD Guiding 2.6.10
Pixinsight 1.8.8-11
Photoshop CC 2022<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Messier 78\u00a0or\u00a0M78, also know…<\/p>\n","protected":false},"author":3,"featured_media":368,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"footnotes":""},"categories":[8,9],"tags":[51,16,61,17,60],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/posts\/364"}],"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\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/comments?post=364"}],"version-history":[{"count":2,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/posts\/364\/revisions"}],"predecessor-version":[{"id":367,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/posts\/364\/revisions\/367"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/media\/368"}],"wp:attachment":[{"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/media?parent=364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/categories?post=364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/astronote.ksgnet.org\/index.php\/wp-json\/wp\/v2\/tags?post=364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}