Questa è una Immagine presente. Click here for more information.

File:Heart Nebula (2020-08-11).jpg

Da Wikimedia Commons, l'archivio di file multimediali liberi
Vai alla navigazione Vai alla ricerca

File originale (4 637 × 3 495 pixel, dimensione del file: 9,58 MB, tipo MIME: image/jpeg)

Didascalie

Didascalie

Aggiungi una brevissima spiegazione di ciò che questo file rappresenta

Dettagli

[modifica]
Descrizione
English: Heart and Fishhead nebulae also includes: Cr30/Mel16/IC1824/NGC1027, IC1831, LBN646-48,50,55-57, and LDN1356,59-73.

Total integration: 43.75 hours/2625 minutes (136x7m = ~16h for Ha + 92x7m = ~11h for O3 + 147x7m = ~17h for S2).

Camera: QHY163M (16mp mono) CMOS cooled to -15 degrees C. Telescope: Stellarvue SV70T triplet apochromat refractor @ f/4.8. Reducer: SFFR70-APO Mount: Paramount MyT. Filters: Astrodon 5nm Ha, 3nm O3, 3nm S2. Software: TheSkyX Pro, SharpCap, PixInsight.

http://ram.org/ramblings/cosmos/
Data
Fonte Opera propria
Autore Ram samudrala
Author's comment about the photo:
InfoField
The Heart nebula region is about 7500 light years away from Earth in the constellation Cassiopeia. The 330 light year diametre complex contains the eponymous emission nebula (Ced7/Cr26/IC1805/LBN654/Mel15/Sh2-190) shaped correspondingly, along with a separate region labelled the Fishhead nebula (Ced6/IC1795/LBN645/NGC896), which was the first part to be discovered. The nebula's shape and distinct signal is due to a cluster of stars in the middle in an area that could appropriately be called the tendrils of creation.

One of the more striking aspects of this nebulosity is the number of dark nebulae (~15) contained within it (LDN1356 and LDN1359 through LDN1373) many of which I've tried to highlight especially on the Ha only image. There's also a small open cluster to the right (Cr30/Mel16/IC1824/NGC1027). One of the cooler features is the ring nebulosity in the centre which you can make out if you look closely, which is like a second (or more likely separate) shell of gases being pushed out.

This capture is part of my "make up for being a newbie" series, where usually once a year I revisit one of my very first images and redo it with the latest capturing and processing techniques that I've learnt. In this regard, the Heart nebula complex represented a lot of firsts for me: it was one of my very first astrophotography images, my first narrowband image, the first colour image with the SV70T scope, and it was done on my first mount. This version which I did back in 2017 had a total of integration of 4.7 hours, so this current version has almost ten times as much information going into it.

There's ~44 hours of captured data going in this version and I think even though the gains are incremental, I was able to bring out additional background nebulosity and details, as well as reduce noise, particularly in the Ha only image which I thought turned out really good: deconvolution actually worked like I thought it would for the first time and I was able to achieve a balance between sharpening and noise reduction. When I first started redoing this, the moon was half full so I decided to capture S2 data first and I was off a bit in my framing which I only corrected after my first session (there's a seam barely visible if you can spot it). I was able to use it but it is why I have the most amount of data using this filter since I wasn't sure if the first session would be useable in the end. Overall, I would have to say this is the first image where everything came together nicely in terms of processing. Take for example the ring nebulosity, it's missed in many images of this target or not pronounced (my previous image doesn't have it at all) but it shows up here nicely.
Luogo dello scatto43° 16′ 19,57″ N, 79° 01′ 20,59″ W Kartographer map based on OpenStreetMap.Posizione di questa e altre immagini su: OpenStreetMapinfo

Riconoscimenti

[modifica]

Immagine presente

Wikimedia CommonsWikipedia

Questa è una immagine in vetrina su Wikimedia Commons (Immagini in vetrina) dove è considerata una delle migliori immagini.
 Questa è una immagine in vetrina su Wikipedia in inglese (Featured pictures) dove è considerata una delle migliori immagini.

Se hai un'immagine della stessa qualità che può essere pubblicata con almeno una licenza accettabile, caricala, usa il tag di copyright appropriato e candidala.

Licenza

[modifica]
Io, detentore del copyright su quest'opera, dichiaro di pubblicarla con la seguente licenza:
w:it:Creative Commons
attribuzione
Questo file è disponibile in base alla licenza Creative Commons Attribuzione 4.0 Internazionale
Tu sei libero:
  • di condividere – di copiare, distribuire e trasmettere quest'opera
  • di modificare – di adattare l'opera
Alle seguenti condizioni:
  • attribuzione – Devi fornire i crediti appropriati, un collegamento alla licenza e indicare se sono state apportate modifiche. Puoi farlo in qualsiasi modo ragionevole, ma non in alcun modo che suggerisca che il licenziante approvi te o il tuo uso.

Cronologia del file

Fare clic su un gruppo data/ora per vedere il file come si presentava nel momento indicato.

Data/OraMiniaturaDimensioniUtenteCommento
attuale10:53, 25 nov 2021Miniatura della versione delle 10:53, 25 nov 20214 637 × 3 495 (9,58 MB)Ram samudrala (discussione | contributi)Uploaded own work with UploadWizard

Impossibile sovrascrivere questo file.

Utilizzo globale del file

Anche i seguenti wiki usano questo file:

Estratto da "https://commons.wikimedia.org/w/index.php?title=File:Heart_Nebula_(2020-08-11).jpg&oldid=894010681"