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Jones-Emberson 1 • Headphone Nebula in HOO, 


            Douglas J Struble
Jones-Emberson 1 • Headphone Nebula in HOO
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Jones-Emberson 1 • Headphone Nebula in HOO

Technical card

Dates:Feb. 16, 2020Feb. 22, 2020

Astrodon Ha 5nm: 836x120" (gain: 200.00) -20C bin 1x1
Astrodon OIII 3nm: 243x120" (gain: 200.00) -20C bin 1x1

Integration: 36.0 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 25.60 days

Avg. Moon phase: 22.60%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details job: 3307335

RA center: 7h 57' 53"

DEC center: +53° 25' 22"

Pixel scale: 0.650 arcsec/pixel

Orientation: 51.032 degrees

Field radius: 0.305 degrees

Resolution: 2641x2112

Locations: Backyard White Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


It's hard to finish anything during these winter months here in Michigan. We had an unusual four days in a row last week, and took the time to really pile on the Ha data. I wish I was able to capture a lot more interior structure, but was happy with the Ha being ejected outside the nebula I captured.

Jones-Emberson 1 (PK 164+31.1), also known as the Headphone Nebula, is a 14th magnitude planetary nebula in the constellation Lynx at a distance of 1600 light years. It is a larger planetary with low surface brightness. The 16.8-magnitude central star is a very blue white dwarf.

Discovered in 1939 by R. Jones and R. Emberson, its "PK" designation comes from the names of Czechoslovakian astronomers Luboš Perek and Luboš Kohoutek, who in 1967 created an extensive catalog of all of the planetary nebulae known in the Milky Way as of 1964. The numbers indicate the position of the object on the sky. ("PK 164+31.1" basically represents the planetary nebula that when using the galactic coordinate system has a galactic longitude of 164 degrees, a galactic latitude of +31 degrees, and is the first such object in the Perek-Kohoutek catalog to occupy that particular one square degree area of sky).



Douglas J Struble
License: None (All rights reserved)


  • Jones-Emberson 1 • Headphone Nebula in HOO, 


            Douglas J Struble
  • Final
    Jones-Emberson 1 • Headphone Nebula in HOO, 


            Douglas J Struble


Description: Did a little experimenting with the stars. I color shifted the HOO stars. While I did not capture RGB on the stars, I thought this looked a bit more natural.

Sky plot

Sky plot


Jones-Emberson 1 • Headphone Nebula in HOO, 


            Douglas J Struble