Hemisphere:  Southern  ·  Constellation: Canis Major (CMa)  ·  Contains:  IC468  ·  NGC 2359  ·  NGC2359  ·  Sh2-298
Getting plate-solving status, please wait...
Thor’s Helmet (NGC 2359), 



    
        

            Gary Lopez
Powered byPixInsight

Thor’s Helmet (NGC 2359)

Imaging telescopes or lenses: William Optics FLT 132 Triplet APO f/7

Imaging cameras: ZWO ASI1600MM Cooled PRO

Mounts: Orion Atlas EQ-G

Guiding telescopes or lenses: Orion 50mm Guide Scope with helical focusing

Guiding cameras: Lacerta M-Gen II Autoguider

Focal reducers: William Optics Flattener 68III

Software: Adobe Lightroom CC  ·  Photoshop CC  ·  Main Sequence Software Sequence Generator Pro, v3.0  ·  Pleaides PixInsight Core 1.8

Filters: Astrodon OIII 3nm-31mm  ·  Astrodon Ha 3nm-31mm


Dates:Dec. 22, 2020Jan. 6, 2021Feb. 5, 2021Feb. 10, 2021Feb. 21, 2021

Frames:
Astrodon Ha 3nm-31mm: 110x180" (gain: 200.00) -15C bin 1x1
Astrodon OIII 3nm-31mm: 148x180" (gain: 200.00) -15C bin 1x1

Integration: 12.9 hours

Darks: ~30

Bias: ~50

Avg. Moon age: 18.04 days

Avg. Moon phase: 42.65%

Bortle Dark-Sky Scale: 4.00


Astrometry.net job: 4301131

RA center: 7h 18' 30"

DEC center: -13° 12' 48"

Pixel scale: 0.863 arcsec/pixel

Orientation: -120.190 degrees

Field radius: 0.418 degrees


Resolution: 2102x2780

Locations: Monterey Pines Observatory, Monterey, California, United States

Data source: Backyard

Description

About 12,000 light years away, in the constellation Canis Major, is an emission nebula popularly known as Thor’s Helmet. The center of the nebula is roughly spherical, with extending filamentous structures of gas and dust that may have been the result of interaction with a nearby molecular cloud. In the middle of the object is the Wolf-Raynet star, WR7, a very hot star that may be nearing supernova.

It was a slog to gather enough data to make this image. Frequent overcast, fog, and poor seeing, coupled with this object’s location low on the horizon, resulted in many short (2-3 hours) unproductive data gathering sessions. All together I was only able to collected about 30 hours of data over a two month stretch. Of those data, I used about 13 hours (with HFR <3.0) for color mapping, and 8.4 hours of better quality data (HFR <2.6) to create a master luminance. Version F is an HOO rendition where I used a color palette that better reveals the gradients in OIII and Ha mixtures. The second rendition, Version B, use a more traditional HOO color palette.

Comments

Revisions

    Thor’s Helmet (NGC 2359), 



    
        

            Gary Lopez
    Original
    Thor’s Helmet (NGC 2359), 



    
        

            Gary Lopez
    B
    Thor’s Helmet (NGC 2359), 



    
        

            Gary Lopez
    C
    Thor’s Helmet (NGC 2359), 



    
        

            Gary Lopez
    D
    Thor’s Helmet (NGC 2359), 



    
        

            Gary Lopez
    E
  • Final
    Thor’s Helmet (NGC 2359), 



    
        

            Gary Lopez
    F

B

Description: Traditional HOO color palette

Uploaded: ...

C

Description: Bit of tweaking of star color

Uploaded: ...

D

Description: Yet another star tweak.

Uploaded: ...

E

Description: Adjusted the stretch to improve contrast and color density

Uploaded: ...

F

Description: Yet another tweak of the star color (perceptible to absolutely nobody but me).

Uploaded: ...

Sky plot

Sky plot

Histogram

Thor’s Helmet (NGC 2359), 



    
        

            Gary Lopez