Hemisphere:  Northern  ·  Contains:  LBN 445  ·  LBN 446  ·  LBN 449  ·  LBN 453  ·  Sh2-129  ·  VdB140
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Sh2-129 Flying Bat & Ou4 Squid Nebula - RGB Ha Oiii, 



    
        

            Jerry Macon
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Sh2-129 Flying Bat & Ou4 Squid Nebula - RGB Ha Oiii

Getting plate-solving status, please wait...
Sh2-129 Flying Bat & Ou4 Squid Nebula - RGB Ha Oiii, 



    
        

            Jerry Macon
Powered byPixInsight

Sh2-129 Flying Bat & Ou4 Squid Nebula - RGB Ha Oiii

Acquisition details

Dates:
Sept. 17, 2021 ·  Sept. 25, 2021 ·  Oct. 7, 2021
Frames:
Antlia 3nm Oiii 50mm Pro: 182×300(15h 10′) (gain: 100.00) -15°C bin 1×1
Antlia RGB 50mm: 176×60(2h 56′) (gain: 100.00) -15°C bin 1×1
Chroma 5nm Ha 50mm: 131×200(7h 16′ 40″) (gain: 100.00) -15°C bin 1×1
Integration:
25h 22′ 40″
Avg. Moon age:
10.45 days
Avg. Moon phase:
56.46%
Bortle Dark-Sky Scale:
3.00
Temperature:
12.00

RA center: 21h11m59s.83

DEC center: +59°5556.3

Pixel scale: 1.140 arcsec/pixel

Orientation: 90.426 degrees

Field radius: 1.742 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 9064x6244

File size: 6.8 MB

Locations: Dark Star Observatory, Taos, New Mexico, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

This image uses my new set of Antlia 50mm Pro 3nm Unmounted filters.  All except the Ha which is a Chroma Ha 5nm 50mm Unmounted.  All filters are 3mm thick, so close to par-focal.  I would have used an Antlia Ha 5nm if they made one, but they don't.  I wanted a 5nm Ha to pick up the Nii emission which is very close to the Ha.

The Ha emission region SH2-129, commonly called the Flying Bat Nebula, contains the Squid Nebula, designated Ou4, a mysterious, squid-like apparition. This nebula is very faint Oiii emission, but also very large in planet Earth's sky. It spans some 2 full moons toward the constellation Cepheus. This image presents the Squid in its true teal colors, a mixture of green and blue.

Ou4 was recently discovered in 2011 by French astro-imager Nicolas Outters, the remarkable nebula's bipolar shape and emission are consistent with it being a planetary nebula, the gaseous shroud of a dying sun-like star, but its actual distance and origin are unknown. A new investigation suggests Ou4 really lies within the Ha emission region SH2-129 some 2,300 light-years away.

Consistent with that scenario, the cosmic squid would represent a spectacular outflow of material driven by a triple system of hot, massive stars, cataloged as HR8119, seen near the center of the nebula. If so, this truly giant squid nebula would physically be nearly 50 light-years across.

My Collections:
Abell Planetary Nebulae (Complete)
Planetary Nebulae
Galaxies
Sharpless 2 Objects

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Sh2-129 Flying Bat & Ou4 Squid Nebula - RGB Ha Oiii, 



    
        

            Jerry Macon