Hemisphere:  Northern  ·  Contains:  NGC 6883
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Wolf-Rayet 134 Ring Nebula, 


            Ivaylo Stoynov
Wolf-Rayet 134 Ring Nebula
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Wolf-Rayet 134 Ring Nebula

Technical card

Imaging telescopes or lenses: Takahashi TOA-130

Imaging cameras: QHYCCD QHY 22

Mounts: Takahashi EM-200

Guiding telescopes or lenses: Takahashi TOA-130

Guiding cameras: QHY5L-II Mono

Focal reducers: Takahashi TOA Reducer at F/5.5

Software: PixInsight PixInsinght 1.8 RC7  ·  PHD guiding  ·  photoshop  ·  APT - Astro Photography Tool

Filters: Baader Planetarium Ha 7nm 2"  ·  Baader Planetarium OIII 8.5nm 2"

Accessory: Brightstar Quantum Electronic Filter Wheel 7x2"  ·  Brightstar Advanced OAG

Dates:July 28, 2017July 29, 2017July 30, 2017

Baader Planetarium Ha 7nm 2": 14x900" -25C bin 1x1
Baader Planetarium OIII 8.5nm 2": 15x900" -25C bin 1x1

Integration: 7.2 hours

Avg. Moon age: 6.32 days

Avg. Moon phase: 38.97%

Basic astrometry details

Astrometry.net job: 1767610

RA center: 20h 10' 14"

DEC center: +36° 10' 26"

Pixel scale: 1.772 arcsec/pixel

Orientation: 154.229 degrees

Field radius: 0.639 degrees

Resolution: 2043x1600

Locations: Nedelkovo, near Sofia, Bulgaria

Data source: Backyard


The star Wolf-Rayet 134 (the brightest star near the image center) is very hot star with temperature over 63,000 K and luminosity around 400,000 times than the Sun. Its radiation and very powerful winds are the reason to form the ring shaped nebula in the mix of stellar matter and surrounding gas. Wolf-Rayet stars loose huge part of their mass in stellar winds...

WR 134 is one of the first three stars with unusual emission lines in the spectrum which lead to creation of new stars class - Wolf-Rayet stars.



Ivaylo Stoynov
License: None (All rights reserved)

Sky plot

Sky plot


Wolf-Rayet 134 Ring Nebula, 


            Ivaylo Stoynov