{"id":8450,"date":"2019-10-29T14:27:31","date_gmt":"2019-10-29T13:27:31","guid":{"rendered":"http:\/\/outters.fr\/?p=8450"},"modified":"2025-07-15T17:04:07","modified_gmt":"2025-07-15T16:04:07","slug":"ngc7013","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=8450","title":{"rendered":"ngc7013"},"content":{"rendered":"

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ngc7013<\/strong>
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Image LRGB<\/h2><\/a><\/div><\/div><\/div>
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Image luminance invers\u00e9e<\/h2><\/a><\/div><\/div><\/div>
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Commentaires sur l’objet photographi\u00e9<\/span><\/p><\/h1><\/span>

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Donn\u00e9es techniques
\n<\/span><\/p><\/h2><\/span>

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Donn\u00e9es techniques de prise de vue<\/h2><\/div>
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Object : ngc7013
\nCommon name :
\nDate images Du 30 sept au 29 oct 2019
\nOptics : Rcos 12.5″
\nMount : Paramount ME Num\u00e9ro 3
\nLocation : Sirene observatory
\nSeeing : fwhm : 1.63 \u00e0 3 arc sec \/pixel
\nCcd : Apogee 16U
\nfilter wheel : Apogee
\nfilters : Astrodon
\nL rvb
\nFocuser :TIM
\nGuiding : Atik 314L+
\nTemp. out : T\u00b0
\nTemp ccd : -25\u00b0
\nResolution ………….. 0.647 arcsec\/px
\nRotation ……………. -93.426 deg
\nObservation date …….. 2019-09-28 19:50:18
\nGeodetic coordinates …. 5 29 13 E 44 00 00 N
\nFocal distance ………. 2870.22 mm
\nPixel size ………….. 9.00 um
\nField of view ……….. 44′ 9.2″ x 44′ 9.2″
\nImage center ………… RA: 21 03 19.036 Dec: +30 05 38.40
\nTotal exposure : 25.75 h
\ntout en binning 1×1
\nRouge 30 x 5′ \/ vert 30 x 5′ \/ bleu 30 x 5′
\nL : 64 x 10′<\/div><\/div><\/div>
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Donn\u00e9es scientifiques<\/h2><\/div>
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Une partie de NGC7013 au HST<\/a> ! pas non ?<\/p>\n

Source wikipedia<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Observation data (J2000<\/a> epoch<\/a>)<\/th>\n<\/tr>\n
Constellation<\/a><\/th>\nCygnus<\/a><\/td>\n<\/tr>\n
Right ascension<\/a><\/th>\n\u00a021h<\/sup>\u00a003m<\/sup>\u00a033.6s<\/sup>[1]<\/a><\/sup><\/td>\n<\/tr>\n
Declination<\/a><\/th>\n29\u00b0\u00a053\u2032\u00a051\u2033[1]<\/a><\/sup><\/td>\n<\/tr>\n
Redshift<\/a><\/th>\n0.002598\/779 km\/s[1]<\/a><\/sup><\/td>\n<\/tr>\n
Distance<\/a><\/th>\n37\/41.4 (estimated) Mly<\/a><\/td>\n<\/tr>\n
Apparent magnitude<\/a>\u00a0(V)<\/small><\/th>\n12.40[1]<\/a><\/sup><\/td>\n<\/tr>\n
Characteristics<\/th>\n<\/tr>\n
Type<\/a><\/th>\nSA(r)0\/a, LINER<\/a>[1]<\/a><\/sup><\/td>\n<\/tr>\n
Size<\/th>\n~43,680 ly (diameter)<\/td>\n<\/tr>\n
Apparent size<\/a>\u00a0(V)<\/small><\/th>\n4.0 \u00d7 1.4[1]<\/a><\/sup><\/td>\n<\/tr>\n
Other designations<\/th>\n<\/tr>\n
UGC<\/a> 11670, CGCG 491-2, IRAS 21014+2941, MCG 5-49-1, PGC<\/a> 66003[1]<\/a><\/sup><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/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

La galaxie NGC7013 est situ\u00e9e juste \u00e0 cot\u00e9 des c\u00e9b\u00e8bres dentelles du Cygne, bizarre que cette galaxie soit aussi peu photographi\u00e9e alors que l’ensemble avec cette n\u00e9buleuse diffuse qui emet uniquement en luminance, la souce HII est nulle !<\/p>\n

L’ensemble est magnifique et je n’ai pas trouv\u00e9 de nom \u00e0 cette n\u00e9buleuse diffuse autour de la galaxie.<\/p>\n

Voici une vue g\u00e9n\u00e9rale de la galaxie \u00e0 cot\u00e9 des dentelles.<\/p>\n

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source wikipedia<\/p>\n

NGC 7013<\/b> is a relatively nearby spiral<\/a> or lenticular galaxy<\/a>[2]<\/a><\/sup>[3]<\/a><\/sup> estimated to be around 37 to 41.4 million light-years<\/a> away from Earth[4]<\/a><\/sup>[5]<\/a><\/sup> in the constellation<\/a> of Cygnus<\/a>.[6]<\/a><\/sup> NGC 7013 was discovered by English astronomer William Herschel<\/a> on July 17, 1784 and was also observed by his son, astronomer John Herschel<\/a> on September 15, 1828.[7]<\/a><\/sup><\/p>\n

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Physical characteristics<\/span><\/h2>\n

NGC 7013 is tilted 90\u00b0 to the Earth’s line of sight,[8]<\/a><\/sup> allowing its structure\u00a0to be\u00a0seen. However, NGC 7013 is classified as either as a spiral galaxy<\/a> with tightly wound arms or as a lenticular galaxy<\/a>.[2]<\/a><\/sup>[9]<\/a><\/sup> NGC 7013 is also considered part of a class of galactic nuclei that is defined by their spectral line emissions<\/a>, called low-ionization nuclear emission-line region<\/a> galaxies or LINERs.[9]<\/a><\/sup>[10]<\/a><\/sup> The galaxy appears to have two rings in its structure. The inner ring appears to completely disconnect from the central bulge while the stars in the outer ring appear to have very little spiral pattern.[2]<\/a><\/sup> Optical images of NGC 7013 show that it has a small bulge[11]<\/a><\/sup> with a bright inner ring and a faint disk both crossed by dust lanes.[3]<\/a><\/sup> A longer exposure of the galaxy made by the Palomar Observatory-National Geographic Sky Survey<\/a> shows an extended disk around the bulge and the inner ring. The disk shows little structure except for a faint, thin spiral-like feature running through the galaxy.[3]<\/a><\/sup><\/p>\n

HI distribution<\/span><\/h3>\n

The neutral atomic hydrogen distribution in NGC 7013 is mostly located in the two rings. In between the two rings there is a very low concentration of interstellar medium. The low level of neutral atomic hydrogen in the disk of NGC 7013 and the reddish color of the galaxy suggests that the gas content of the galactic disc has fallen below the threshold at which star formation is likely to take place. The small bulge-to-disk ratio and the slow rotation velocity show that NGC 7013 is a low-mass, low-density galaxy unlike the more luminous, typical lenticular galaxies<\/a>. The galaxy may thus be a former late-type spiral galaxy which have exhausted most of its interstellar gas, either by star formation or by internal sweeping.[3]<\/a><\/sup><\/span><\/p>\n<\/div><\/div><\/div>

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