Jones-Emberson 1 (PK 164+31.1), also known as the Headphone Nebula, is a 14th magnitude
planetary nebula
A planetary nebula (PN, plural PNe) is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives.
The term "planetary nebula" is a misnomer because they are unrelate ...
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
A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to the Sun's, while its volume is comparable to the Earth's. A white dwarf's faint luminosity comes ...
.
Historic data
Discovered in 1939 by
Rebecca Jones and Richard M. Emberson, its "PK" designation comes from the names of Czechoslovakian astronomers
Luboš Perek and
Luboš Kohoutek
Luboš Kohoutek (, born 29 January 1935) is a Czech astronomer and a discoverer of minor planets and comets, including Comet Kohoutek which was visible to the naked eye in 1973.
He also discovered a large number of planetary nebulae.
Biography ...
, who in 1967 created an extensive catalog of all of the planetary nebulae known in the
Milky Way
The Milky Way is the galaxy that includes our Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye. ...
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
The galactic coordinate system is a celestial coordinate system in spherical coordinates, with the Sun as its center, the primary direction aligned with the approximate center of the Milky Way Galaxy, and the fundamental plane parallel to an a ...
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).
Gallery
Jones1 Mark Johnston.png, Amateur astronomer photo of Jones-Emberson 1
Headphones Nebula .jpg, Planetary nebula Jones-Emberson 1 (PK164+31.1) shot in HOO
See also
*
List of planetary nebulae
The following is an incomplete list of known planetary nebulae.
See also
* Lists of astronomical objects
* Lists of planets
* Lists of exoplanets
These are lists of exoplanets. Most of these were discovered by the Kepler space telescop ...
External links
Catalogue of Galactic Planetary Nebulae - The PK Astronomical Catalog
References
Astronomical objects discovered in 1939
Planetary nebulae
Lynx (constellation)
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