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File:Elephant trunk nebula.jpg

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Summary

Description
English: Photo of ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. The entire region is ionized by the massive star nearby (HD 206267), except for dense globules that can protect themselves from the star's ultraviolet rays. The combined action of the light from the massive star ionizing and compressing the rim of the cloud, and the wind from the young stars shifting gas from the center outward lead to very high compression in the Elephant's Trunk Nebula. This pressure has triggered the current generation of protostars.

Subframes for the photo was taken from Estonia. Stacked image is post-processed in so called HOO palette, where different wavelenghts has been assined different colors. Photo processing technique know as drizzle (2x) has been used to increase the resolution of the original image.

Technical details:

  • Telescope - SharpStar 61EDPH III
  • Mount - SkyWatcher EQ6R-PRO
  • Guider - Starlight Xpress Lodestar
  • Filter - Optolong L-eNhance
  • Camera - ASI071MC PRO
  • Software for acquisition and processing - PHD2, N.I.N.A, PixInsight, Photoshop
  • Total exposure - about 6 hours (+dark, flat and flat dark frames)
  • RA center - 21h39m49s.4
  • DEC center - +57°30′10″
  • Pixel scale - 3.256 arcsec/pixel
  • Orientation - 83.918 degrees
  • Field radius - 2.722 degrees
Eesti: Elevandi Londi udukogu asub meist umbes 2400 valgusaasta kaugusel ning koosneb suurest ligi sadakond valgusaastat laiast gaasi- ja tolmupilvest, mis on täis ohtralt pisemaid tähetekke piirkondi. Terve udu paneb helendama udukogu keskel asuv sinine ülihiidtäht (tegelikult kolmiktäht) tähisega HD 206267, mille tähetuule kiiruseks on mõõdetud rekordilised 3225 kilomeetrit sekundis. Fotol udu vasakus servas iseloomulikus ringikujulises halos paistab täht nimega Mu Cephei või Hercheli Garneti täht. Tegemist on punase hüperhiiuga, mille mõõtmeid Päikesesüsteemis võib võrrelda Saturni orbiidi ulatusega. Päikese heledust ületab see 38 000 korda. Nii nagu Orioni tähtkujus asuv Betelgeus on ka Garnet jõudnud oma elu viimasesse etappi ning plahvatab kosmilises ajaskaalas varsti supernoovana. Kuigi udukogu heledus on kaugel silmaga nähtavusest (isegi teleskoobiga märkamiseks läheb vaja üsna kogukat tehnikat) mahuks taevas vaadates selle sisse mitu täiskuu ketast.

Foto jaoks vajalikud kaadrid on tehtud Eestist Tõrva linna taevast ning foto on töödeldud võltsvärvidesse (HOO). Foto resolutsiooni on suurendatud läbi nii-nimetatud drizzle (2x) tehnika.

Kasutatud tehnika:

  • Teleskoop: Sharpstar edph61 III
  • Monteering: EQ6R-PRO
  • Kaamera: ASI071MC Pro
  • Filter: Optolong L-eNhance
  • Säriaeg: 70x300sekundit (+50 tasavälja, 50 tumedat tasavälja, 50 tumedat)
  • Tarkvara: PHD2, N.I.N.A, PixInsight, Photoshop
English: Astrophotography image of Elephant Trunk Nebula (IC 1396) in Cepheus
Date
Source Own work
Author Nielander

Licensing

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The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.


Captions

Elephant Trunk Nebula (IC 1396) in Cepheus

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5 September 2023

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Date/TimeThumbnailDimensionsUserComment
current20:28, 5 December 2023Thumbnail for version as of 20:28, 5 December 20238,970 × 5,979 (14.32 MB)NielanderUploaded own work with UploadWizard

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