File:Ic443 nf c shorgb 2218m+823m+666m+729m 2218m 37h.jpg
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[modifica]DescrizioneIc443 nf c shorgb 2218m+823m+666m+729m 2218m 37h.jpg |
English: Jellyfish nebulae also includes Eta Geminorum/Propus, Mu Geminorum/Tejat, and LDN1564-LDN1568.
Total integration: 2218 minutes/37 hours (137/19 x 300/420s or 13.7h for Ha + 94/28 x 300/420s or 11.1h for O3 + 94/35 x 300/420s or 12.2h for S2).
http://ram.org/ramblings/cosmos/ The Jellyfish nebula (IC443) is the name given to a galactic supernova remnant situated in the constellation Gemini about 5000 light years from Earth. The remains of a supernova that exploded prior to the dawn of the Julian and Gregorian calendars is coincidentally bookended by two bright stars in the frame, Eta Geminorum aka Propus/Praepus/Tejat Prior on the right and Mu Geminorum aka Tejat/Calx on the left side. The narrowfield framing shows the partial shell of supernova remnant (G189.0+03.0) with its distinctive Jellyfish shape in the bottom right quadrant interacting with the molecular clouds surrounding it above and to the left, seemingly as though it is striking them with bolts of lightning. The interactions of the remnant with its surroundings all around are what give rise to its eponymous shape. The four dark nebulae (LDN1565-156 towards the left in the top half are situated within Sh2-249, which also includes IC444 and LDN1564. The widefield framing (coming soon) showcases the full extended region of about 70 light years properly, also with Drizzle and LocalNormalization so that the banding goes away. I once again did what I did earlier, i.e., imaged the target with two scopes to get two different framings and then combined all the data together, which was collected over two years. One of the difficulties I had with this particular target was that the moon would also rise up along with nebula when it would begin to appear in the sky for me (late fall) so there were several hours worth of exposure that had to be thrown away. Given that it is a relatively bright object, I managed to collect enough signal to produce a decent image. |
Data | |
Fonte | Opera propria |
Autore | Ram samudrala |
Luogo dello scatto | 43° 16′ 19,57″ N, 79° 01′ 20,59″ W | Posizione di questa e altre immagini su: OpenStreetMap | 43.272102; -79.022387 |
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Questo file è stato caricato come parte di Wiki Science Competition 2021. |
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attuale | 10:53, 25 nov 2021 | 4 631 × 3 482 (12,65 MB) | Ram samudrala (discussione | contributi) | Uploaded own work with UploadWizard |
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Larghezza | 4 631 px |
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Altezza | 3 482 px |
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Meccanismo di compressione | Senza compressione |
Orientamento | Normale |
Numero delle componenti | 3 |
Risoluzione orizzontale | 72 punti per pollice (dpi) |
Risoluzione verticale | 72 punti per pollice (dpi) |
Disposizione dei dati | a blocchi (chunky) |
Software | PixInsight 1.8.8-6 / PCL 2.4.0 |
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43°16'19.567"N, 79°1'20.593"W
18 mar 2021
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