Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  PK064+05.1
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Campbell's Hydrogen Star, Gary Imm
Campbell's Hydrogen Star, Gary Imm
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Campbell's Hydrogen Star

Getting plate-solving status, please wait...
Campbell's Hydrogen Star, Gary Imm
Campbell's Hydrogen Star, Gary Imm
Powered byPixInsight

Campbell's Hydrogen Star

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Description

This small PN, also known as PK 64+5.1, is located 10,000 light years away in the constellation of Cygnus at a declination of +31 degrees in a rich Milky Way star field.  It spans 10 arc-seconds in our apparent view, which is a bit smaller than the current size of Venus.  It has a diameter of 0.7 light year.

The 10th magnitude star at the center of this PN is a WC star with a spectral type of WC9.  This central star, known as HD 184738, is unusual in that it has a very strong hydrogen spectrum, a nearly missing oxygen spectrum, and a very small planetary nebula surrounding it consisting by plumes of hydrogen and nitrogen gas.

This object was discovered in 1893 by the American astronomer William Campbell at Lick Observatory and is known as Campbell's Hydrogen Star.     A Hubble image of this object is shown here.

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