Hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  B75
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Barnard 75, 



    
        

            Gary Imm
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Barnard 75

Getting plate-solving status, please wait...
Barnard 75, 



    
        

            Gary Imm
Powered byPixInsight

Barnard 75

Imaging telescopes or lenses: Takahashi TOA-130NFB

Imaging cameras: ZWO ASI 1600MM Cooled Pro

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: Orion 60mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider Pro Mono

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

Filters: Astrodon Green 31mm Gen2 I-Series  ·  Astrodon Blue 31mm Gen2 I-Series  ·  Astrodon Lum 31mm Gen2 I-Series  ·  Astrodon Red 31mm Gen2 I-Series

Accessory: ZWO EFW  ·  Takahashi Flattener TOA-67  ·  Feathertouch Focuser Boss II Electronic Focusing Control


Dates:June 27, 2019June 28, 2019

Frames:
Astrodon Blue 31mm Gen2 I-Series: 60x60" (1h) (gain: 139.00) -15C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 60x60" (1h) (gain: 139.00) -15C bin 1x1
Astrodon Lum 31mm Gen2 I-Series: 140x60" (2h 20') (gain: 139.00) -15C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 60x60" (1h) (gain: 139.00) -15C bin 1x1

Integration: 5h 20'

Avg. Moon age: 24.55 days

Avg. Moon phase: 25.64%


Astrometry.net job: 2777401

RA center: 17h 25' 23"

DEC center: -22° 9' 11"

Pixel scale: 0.782 arcsec/pixel

Orientation: -109.815 degrees

Field radius: 0.486 degrees


Resolution: 3507x2781

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

Data source: Backyard

Description

This object is a uniquely shaped dark nebula located in the dust and star filled constellation of Ophiuchus at a latitude of -22 degrees. Unfortunately, typical for dark nebulae, not much has been written about this object. The nebula spans about 40 arc-minutes in the sky. I could not find a distance estimate for this object, but similar dark nebula in this region typically lie about 500 light years away. If that is true for this object, its true diameter would be about 6 light years.

I find the shape of this dark concentration of dust and molecular gas to be very interesting - a rough half-circle, with spurs around the inner circumference.

Comments

Sky plot

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Histogram

Barnard 75, 



    
        

            Gary Imm