Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1805  ·  Sh2-190
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Melotte 15 - Swan Lake, 



    
        

            Bogdan Borz
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Melotte 15 - Swan Lake

Getting plate-solving status, please wait...
Melotte 15 - Swan Lake, 



    
        

            Bogdan Borz
Powered byPixInsight

Melotte 15 - Swan Lake

Imaging telescopes or lenses: Teleskop Service ONTC 10" f4 Newton

Imaging cameras: ZWO 1600mm Cooled Pro

Mounts: Skywatcher AZEQ6

Guiding cameras: ZWO ASI 120 mini

Focal reducers: GPU Pal Gyulai GPU coma corrector

Software: Pleiades Astrophoto PixinsIght  ·  PhotoShop

Filters: Astrodon S2 3nm 36mm  ·  Astrodon O3 3nm 36mm  ·  Astrodon Ha 3nm 36mm

Accessory: ZWO EAF Electronic Auto Focuser


Dates:Nov. 21, 2020Nov. 22, 2020Nov. 23, 2020Nov. 25, 2020

Frames:
Astrodon Ha 3nm 36mm: 86x300" (7h 10') (gain: 139.00) -20C bin 1x1
Astrodon O3 3nm 36mm: 69x300" (5h 45') (gain: 139.00) -20C bin 1x1
Astrodon S2 3nm 36mm: 90x300" (7h 30') (gain: 139.00) -20C bin 1x1

Integration: 20h 25'

Darks: 50

Flats: 30

Flat darks: 30

Avg. Moon age: 8.33 days

Avg. Moon phase: 59.56%

Bortle Dark-Sky Scale: 8.00


RA center: 02h34m36s.102

DEC center: +61°1608.89

Pixel scale: 0.782 arcsec/pixel

Orientation: -85.136 degrees

Field radius: 0.616 degrees

More info:Open 


Resolution: 4528x3428

Locations: Backyard, Toulouse, Occitanie, France

Data source: Backyard

Description

One of the most beautiful nebulae in the Northern Hemisphere, in my opinion, Melotte 15 is situated 7500 ly away in Cassiopeia and contains a star cluster which is 1.5 million years old (Source: APOD). Melotte is a catalogue of star clusters, containing 245 such objects (and one galaxy M57). It was created by (no suprise) Melotte, Philibert Jacques for his friends.

The project was partly shot close to the full moon and I couldn't complete the O3 data due to delays in acquisitions during the night. They were caused by the autofocus process (it is totally incomprehensible how something that usually works flawlessly, now took a long time finding correct focus even when the first autofocus was successful). In spite of this, I think it is the best image I produced with the Newtonian so far. The nebula is full of smaller clouds visible through the transparency the oxygen layer, especially in full resolution. The contrast with the darker filaments is what fascinates me about this object and of course the swan - like clouds that arise from the ocean of oxygen.

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