Hemisphere:  Southern  ·  Constellation: Vela (Vel)
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Vela Spiral Flame + Gum 18/19/20, 



    
        

            Gary Imm
Vela Spiral Flame + Gum 18/19/20, 



    
        

            Gary Imm

Vela Spiral Flame + Gum 18/19/20

Getting plate-solving status, please wait...
Vela Spiral Flame + Gum 18/19/20, 



    
        

            Gary Imm
Vela Spiral Flame + Gum 18/19/20, 



    
        

            Gary Imm

Vela Spiral Flame + Gum 18/19/20

Imaging telescopes or lenses: Takahashi TOA-130NFB

Imaging cameras: ZWO ASI 6200 MM Pro

Mounts: Astro-Physics Mach1GTO

Guiding cameras: ZWO ASI 174 MM Mini

Software: Main Sequence Software Sequence Generator Pro  ·  Pixinsight  ·  Stark Labs PHD2 2.6.3

Filters: Chroma OIII 3nm  ·  Chroma Red 2" unmounted  ·  Chroma Ha 3nm  ·  Chroma Blue 2" unmounted  ·  Chroma Green 2" unmounted

Accessory: ZWO M68 OAG  ·  ZWO EFW 2″X7  ·  Takahashi Flattener TOA-67  ·  Feathertouch Focuser Boss II Electronic Focusing Control


Dates:March 1, 2021March 2, 2021March 3, 2021

Frames:
Chroma Blue 2" unmounted: 30x120" (gain: 0.00) -20C bin 1x1
Chroma Green 2" unmounted: 30x120" (gain: 0.00) -20C bin 1x1
Chroma Ha 3nm: 24x300" (gain: 100.00) -20C bin 1x1
Chroma OIII 3nm: 24x300" (gain: 100.00) -20C bin 1x1
Chroma Red 2" unmounted: 30x120" (gain: 0.00) -20C bin 1x1

Integration: 7.0 hours

Avg. Moon age: 18.25 days

Avg. Moon phase: 86.22%


Astrometry.net job: 4294698

RA center: 8h 56' 45"

DEC center: -43° 39' 8"

Pixel scale: 0.775 arcsec/pixel

Orientation: 0.678 degrees

Field radius: 1.205 degrees


Resolution: 9342x6154

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard

Description

This image captures a supernova remnant (SNR) and 3 emission regions located in the constellation of Vela at a declination of -44 degrees.

The filamentary object is a part of the Vela supernova remnant, located 800 light years away in the southern constellation of Vela. It is estimated that the supernova exploded approximately 12,000 years ago. The Vela SNR is one of the closest supernova remnants to earth. The region captured in this image shows a spiraling helical length of twisting OIII filaments. My favorite part of the image are the faint reddish Ha wisps which follow some of the leading arcs of the greenish OIII filaments. The weak strength of these emissions, combined with the low declination of the target from my viewing site, makes this a tough object for me to capture.

It is interesting to compare this SNR with the Cygnus Loop, which is similar in actual diameter. The Vela SNR is much closer and much younger, yet much fainter.

Gum 19, also known as RCW 34, is the bright red emission region at the top of the image. It is located 22,000 light years away, is 3 arc-minutes long, and has a size of 20 light years. It is ionized by the huge, hot star V391 Velorum, barely visible as the small white dot inside of the nebula. I like the sharp edge of the top of the nebula.

Gum 20 is the bright red emission region on the left. This object is located 2300 light years away and is also known as RCW 36. It is 17 arc-minutes long and is smaller in actual size than Gum 19, at a size of 11 light years. Gum 20 is ionized by a large 350 member star cluster which is hidden behind the dust. Its bright red patches remind me of a smaller version of the Cat’s Paw Nebula (Gum 61-64).

Gum 18 is the red emission feature to the right of the Spiral Flame.

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    Vela Spiral Flame + Gum 18/19/20, 



    
        

            Gary Imm
    Original
  • Vela Spiral Flame + Gum 18/19/20, 



    
        

            Gary Imm
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Vela Spiral Flame + Gum 18/19/20, 



    
        

            Gary Imm