Jones-Emberson 1

Jones-Emberson 1
Planetary Nebula Jones-Emberson 1 (PK164+31.1).
Observation data (Epoch J2000)
Right ascension	07^h 57^m 51.628^s[1]
Declination	+53° 25′ 16.96″[1]
Distance	1600 ly
Apparent magnitude (V)	14
Apparent dimensions (V)	{{{size_v}}}
Constellation	Lynx
Physical characteristics
Other designations	PK164+31.1, Headphone Nebula

Jones-Emberson 1 (PK 164+31.1) 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.

Historic data

Discovered in 1939 by R. Jones and R. Emberson, it's "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).

See also

• List of planetary nebulae

External links

• Catalogue of Galactic Planetary Nebulae - The PK Astronomical Catalog

References

1. "SIMBAD Astronomical Database". Results for PK 164+31.1. Retrieved 2009-12-07.