{"id":8539,"date":"2020-02-24T02:15:00","date_gmt":"2020-02-24T01:15:00","guid":{"rendered":"http:\/\/outters.fr\/?p=8539"},"modified":"2025-07-15T17:04:06","modified_gmt":"2025-07-15T16:04:06","slug":"sharpless-240-haoiii-rgb","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=8539","title":{"rendered":"Sharpless 240 HaOIII-rgb"},"content":{"rendered":"

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Sharpless 240 HaOIII-rgb<\/span><\/span><\/p><\/h2><\/span>

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Image Har-rgb<\/h2><\/a><\/div><\/div><\/div>
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Image HaOIII luminance invers\u00e9e<\/h2><\/a><\/div><\/div><\/div>
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Image RGB<\/h2><\/a><\/div><\/div><\/div>
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Donn\u00e9es techniques
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Donn\u00e9es techniques de prise de vue<\/h2><\/div>
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Object :Sharpless 240
\nCommon name :
\nDate : du 25 dec 2019 au 25 fev 2020
\nOptics : Newton SV400 16″
\nMount : Paramount ME Num\u00e9ro 2
\nLocation : Orange observatory
\nSeeing FWHM :2.22 \u00e0 4
\nCcd : FLI Proline 16803
\nfilter wheel : FLI
\nfilters : Astrodon HaOIIIRVB
\nFocuser :Atlas
\nGuiding : Atik 414L+
\nTemp. out : T\u00b0 de 3 \u00e0 13 \u00b0
\nTemp ccd : -35\u00b0
\nResolution …………… 1.154 arcsec\/px
\nRotation …………….. 177.514 deg
\nObservation start time … 2019-12-30 20:22:01 UTC
\nFocal distance ……….. 1609.32 mm
\nPixel size …………… 9.00 um
\nField of view ………… 1d 18′ 44.8″ x 1d 18′ 44.8″
\nImage center …………. RA: 5 42 10.922 Dec: +28 53 53.97
\nTotal exposure 33.40 h
\ntout en binning 1×1
\nHa 77 x 10mn
\nOIII 56 x 10mn
\n45R 45V 45B x 5mn<\/div><\/div><\/div>
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Commentaires sur l’objet photographi\u00e9<\/span><\/p><\/h1><\/span>

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\"outters-nicolas\"<\/p>\n

Source Wikipedia<\/strong><\/em><\/p>\n

SNR G180.8-02.2, aussi catalogu\u00e9 sous SIM 147, S147 et GRS 180.00 -01.70 ou encore Simeis 147, Sh 2-240 et n\u00e9buleuse du (ou des) Spaghetti(s), est un r\u00e9manent de supernova situ\u00e9 \u00e0 approximativement entre 1 000 et 3 000 ann\u00e9es-lumi\u00e8re de la Terre en direction des constellations du Taureau et du Cocher2. Il fait partie des r\u00e9manents de supernova auxquels est associ\u00e9 un pulsar, en l’occurrence PSR J0538+2817. Dot\u00e9 d’un diam\u00e8tre angulaire \u00e9lev\u00e9e, la d\u00e9termination de son centre est longtemps rest\u00e9e impr\u00e9cise, ce qui valut \u00e0 l’objet d’\u00eatre un temps catalogu\u00e9 sous le nom de SNR G180.0-01.7.<\/p>\n

Caract\u00e9ristiques physiques<\/p>\n

\"\"<\/a>

L’image pr\u00e9sent\u00e9e n’est qu’une petite partie du r\u00e9manent<\/p><\/div>\n

SNR G180.8-02.2 a \u00e9t\u00e9 d\u00e9couvert relativement t\u00f4t, en 1952, la premi\u00e8re mention de son assimilation avec un r\u00e9manent de supernova remontant \u00e0 19683. Sa contrepartie optique fut observ\u00e9e la premi\u00e8re fois 5 ans apr\u00e8s, r\u00e9v\u00e9lant une coquille plus grande qu’en radio (195\u00d7200 minutes d’arc contre 175 minutes de diam\u00e8tre en radio)4.<\/p>\n

Le r\u00e9manent a connu un regain d’int\u00e9r\u00eat \u00e0 partir de 1996, date \u00e0 laquelle fut identifi\u00e9 un pulsar \u00e0 proximit\u00e9 du centre du r\u00e9manent, et soup\u00e7onn\u00e9 d’\u00eatre physiquement li\u00e9 \u00e0 celui-ci5 (\u00e0 l’\u00e9poque seulement une quinzaine de pulsars sur les plus de 700 connus \u00e9taient associ\u00e9s \u00e0 un r\u00e9manent). D\u00e9cal\u00e9 de 40 minutes d’arc du centre du r\u00e9manent, ce pulsar, PSR J0538+2817, est vraisemblablement anim\u00e9 d’un mouvement relatif par rapport \u00e0 celui-ci, du fait d’une asym\u00e9trie dans l’explosion de la supernova qui lui a donn\u00e9 naissance. Le pulsar, dot\u00e9 d’un \u00e2ge caract\u00e9ristique notablement sup\u00e9rieur \u00e0 l’\u00e2ge estim\u00e9 du r\u00e9manent (600 000 ans contre 80 000 \u00e0 200 000 ans, voire moins6) a vu son mouvement propre mis en \u00e9vidence en 2003, confirmant son d\u00e9placement \u00e0 l’oppos\u00e9 du centre du r\u00e9manent dont il est vraisemblablement issu7.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":8536,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"footnotes":""},"categories":[102,114,122,126,152,367,416],"tags":[421],"class_list":["post-8539","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-nebuleuse","category-sharpless","category-haoiii-rvb","category-observatoire-dorange","category-toutes-categories","category-telescope-newton-16-skyvision","category-saison-2020","tag-sharpless-240","post_format-post-format-image"],"_links":{"self":[{"href":"https:\/\/www.outters.fr\/index.php?rest_route=\/wp\/v2\/posts\/8539","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.outters.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.outters.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.outters.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.outters.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8539"}],"version-history":[{"count":3,"href":"https:\/\/www.outters.fr\/index.php?rest_route=\/wp\/v2\/posts\/8539\/revisions"}],"predecessor-version":[{"id":8544,"href":"https:\/\/www.outters.fr\/index.php?rest_route=\/wp\/v2\/posts\/8539\/revisions\/8544"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.outters.fr\/index.php?rest_route=\/wp\/v2\/media\/8536"}],"wp:attachment":[{"href":"https:\/\/www.outters.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8539"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.outters.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8539"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.outters.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}