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Contains:  Great Nebula in Orion, M 42, M 43, NGC 1976, NGC 1980, NGC 1982, The star θ1Ori, The star θ2Ori, The star ιOri
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What if..., 



    
        

            Edoardo Luca Radi...
What if...
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What if...

Technical card

Imaging telescopes or lenses: TS Optics TS APO80Q

Imaging cameras: SBIG ST-2000XM

Mounts: 10 Micron GM1000 HPS

Software: Pixinsight  ·  APT - Astro Photography Tool

Filters: Baader Planetarium Ha 7nm  ·  Baader Planetarium OIII 8.5nm  ·  Baader Planetarium Hb 8.5 nm


Dates:Oct. 23, 2014

Frames:
Baader Planetarium Ha 7nm: 16x300" -20C bin 1x1
Baader Planetarium Hb 8.5 nm: 9x360" bin 1x1
Baader Planetarium OIII 8.5nm: 8x400" bin 1x1

Integration: 3.1 hours

Darks: ~50

Flats: ~10

Bias: ~100

Avg. Moon age: 29.13 days

Avg. Moon phase: 0.18%


Basic astrometry details

Astrometry.net job: 407269

RA center: 5h 34' 46"

DEC center: -5° 32' 16"

Pixel scale: 1.409 arcsec/pixel

Orientation: 166.686 degrees

Field radius: 0.658 degrees


Resolution: 2590x2145

Locations: Castenedolo, Castenedolo, Italy

Description

What if...
...we had HUGE pupils?

Our retina would be able to activate the photopic vision for celestial objects, and the elusive colors of nebulae would became obvious like in a sunset.

The bright nebulae emission derives mainly from ionized gas.
In this image, composed in narrow band, contributions of H alpha, H beta and OIII were summed with their characteristic colors:
H-alpha in red
H beta in blue
and OIII in blue-green.

After careful calibration taking into account the different exposure times, the transmissivity of the filters and the quantum efficiency of the CCD, image was composed to create this natural color image of the Great Orion Nebula.

Cosa succederebbe se...
...avessimo ENORMI pupille?

Allora la nostra retina sarebbe in grado di attivare la visione fotopica per gli oggetti celesti, e gli elusivi colori delle nebulose sarebbero evidenti come quelli di un tramonto.

L'emssione luminosa delle nebulose deriva pricipalmente dal gas ionizzato.
In questa immagine, composta in banda stretta, sono stati sommati i contributi di H alfa, H beta e OIII con i loro colori caratteristici:
H alfa nel rosso
H beta nell'azzurro
e OIII nel verde-azzurro.

Dopo un'attenta calibrazione che ha considerato i diversi tempi di posa, la trasmissività dei filtri e l'efficienza quantica del CCD l'immagine è stata composta in modo da generare questa immagine a colori naturali della Grande Nebulosa di Orione.

Comments

Author

astroedo
Edoardo Luca Radi...
License: Attribution-NonCommercial-NoDerivs Creative Commons
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